JP2003302960A - Image display device, image display method, and computer program - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an apparatus and a method for realizing image display that prevents illegal copy generation by re-shooting an image. Kind Code: A1 A display process in which a display mode is changed on a time axis or a space, specifically, for example, RGB and RGBY
The configuration is such that display switching is performed. When the image subjected to the display processing is taken by a video camera and reproduced, if the image has been subjected to the switching processing on the time axis, a flicker in which different colors are alternately displayed occurs.
Further, in the case of an image that has been subjected to switching processing in a space (display area), color unevenness occurs, and the image is difficult to watch. The color change is hardly recognized in the normal visual observation state, but is surely reflected in the image captured by the camera, causing the quality of the reproduced image of the captured image to deteriorate, and effectively duplicating and redistributing the image data. Can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, an image display method, and a computer program, and in particular, it is possible to effectively prevent illegal copying of image information displayed on a screen or a display. The present invention relates to an image display device, an image display method, and a computer program.

[0002]

2. Description of the Related Art With the progress of digital technology, digital recording / reproducing apparatuses have been popularized which are free from image quality deterioration and sound quality deterioration caused by repetitive execution of recording / reproducing processing.
Digital Tater content such as various images and music is DVD,
It has become available for distribution and distribution through media such as CDs or networks.

Unlike analog recording / reproduction, digital recording / reproduction does not cause data deterioration even if recording / reproduction processing is repeatedly executed, and therefore the same quality as original data is maintained. The widespread use of such digital recording / reproducing technology results in a flood of illegal copies, which is a major problem from the viewpoint of copyright protection.

Further, a network, CD, DV
In addition to illegal copying of content via a storage medium such as D, an image presented to many users in a movie theater or the like or an image displayed on a display is closely captured by a video camera, and the captured image is There is also a problem that copyright infringement occurs by re-displaying it without permission of the copyright owner or by secondary distribution.

As a countermeasure against such a copyright problem, there is a so-called copy guard system for preventing unauthorized duplication of moving images in, for example, a video tape recorder device or a satellite broadcasting system. For example, Macrovision Corporation The AGC pulse system is known.

The AGC pulse system is an AGC (Automatic Gain Control) installed in a video tape recorder device.
Is a technique that prevents normal recording of the output source by causing the erroneous operation. The AGC is a circuit for automatically adjusting the gain of an input signal to maintain appropriate sensitivity, and is widely installed in consumer video tape recorder devices.

Generally, video signals mutually input and output by consumer video equipment are composed of a luminance signal, a color signal, a synchronizing signal for scanning, a color burst signal and the like. In the video signal, a luminance signal and a color difference signal for one scanning are divided at a few intervals called horizontal blanking on the time axis, and a horizontal synchronizing signal and a color burst signal are stored in this horizontal blanking. . Also, the video signal is
A vertical synchronizing signal is stored in the vertical blanking provided for each field forming a moving image. In general consumer video equipment, the scanning timing of the image is adjusted using the horizontal synchronizing signal and the vertical synchronizing signal, and the color signal is demodulated using the color burst signal.

In the AGC pulse system, the luminance signal and the color difference signal are not changed, and an erroneous signal is mixed in the blanking portion to synchronize the AGC mounted on the video tape recorder. It causes a malfunction. That is, in the AGC pulse method, the video signal is prevented from being illegally copied by erroneously operating the AGC.

As described above, in the AGC pulse system,
Incorrect copying is prevented by mixing an erroneous signal in the blanking portion of the video signal. Therefore, for example, there is a problem in that it is possible to perform illegal duplication simply by exchanging the synchronizing signals of the blanking portion when duplicating the video.

In recent years, for example, DVD (Digita)
Information recording media such as Versatile Discs) that record images and sounds in a digital system are becoming widespread. DVD
Then, when recording image information and audio information, ISO / IE
An encoding method defined by C11172 (MPEG-1) or ISO / IEC13818 (MPEG-2) is often used. Conventionally, a dedicated recording / reproducing device (hereinafter referred to as a DVD player) has been used to record / reproduce images, sounds, etc. on such a DVD, but in recent years, a so-called personal computer device has been used. Even if it is used, recording and reproduction can be freely performed. Further, it is also practiced to copy images and sounds recorded on a DVD to a hard disk device (HDD) mounted on a personal computer device.

As described above, when recording or copying an image or a sound by using a personal computer device, since the blanking portion of the video signal is not used, an illegal duplication depending on the conventionally used AGC pulse method is performed. There was a problem that could not be prevented.

When a video signal is digitally reproduced by using, for example, a DVD player or a personal computer, a CPRM (Content Protec) is used.
Unauthorized copying can be prevented by technologies such as tion for Recordable Media). However, for example R
When the signal is converted into an analog signal via the GB output and then converted into a digital signal again for recording, there is a problem that it is impossible to prevent illegal duplication by using the CPRM technique or the like.

A digital watermark (watermark) is an advantageous configuration in terms of eliminating such a problem. Watermarks are difficult to see or perceive in the playback state of normal contents (image data or audio data), and the detection and embedding of digital watermarks can only be performed by executing specific algorithms or processing by specific devices. It will be possible. By detecting a digital watermark (watermark (WM)) at the time of content processing in a receiver, a recording / reproducing device, and the like, and performing control according to the digital watermark, more reliable control is possible.

One aspect of a copyright protection method using a digital watermark (watermark (WM)) for contents relates to copyright due to a minute signal level that does not affect reproduction of a video signal, an audio signal, or the like. There is one in which a data modulation signal or the like is recorded by being superimposed on a video signal, an audio signal, or the like. In the age of digital networks, where various digital contents such as images, sounds, and data may be copied or distributed without deterioration, digital watermark technology protects copyright by embedding information in the content itself. This is a powerful technology that can

Digital watermark (watermark (WM))
The information embedded in the content is not limited to the copy control information, but various information such as content copyright information, content processing information, content configuration information, content processing information, content editing information, or content reproduction processing method is embedded. It is possible.

US Pat. No. 6,018,374 is available as a technique for making it possible to verify re-photographed image data in an image presentation mode for an unspecified person such as a movie. In this US patent, an infrared light projector for projecting information such as a data source is provided separately from an image projector for projecting a data image of a movie, etc. Is also projected, and information such as a data source is left in the re-photographed image. Since infrared light cannot be recognized in a normal visual state, it does not make viewers who are watching a movie feel uncomfortable, but a trace remains on a video image.
It is possible to confirm that the image is a re-photographed image based on the image data.

[0017]

However, the technique described in US Pat. No. 6,018,374 is one in which information such as a data source is projected by an infrared light projector, and an infrared light cut filter is used as a video camera. It is possible to exclude information such as a data source due to infrared light from the captured image by attaching to. Also, when the infrared light projector for projecting information such as the data source is deactivated, it is possible to display the image data excluding the information such as the data source, and when the image presenter conspires. Causes a problem that the copyright is not effectively protected.

The present invention has been made in view of the above problems, and ensures protection of image data provided to an unspecified viewer such as image data of a movie displayed on a screen or a display. An image display device, an image display method, and a computer program capable of effectively preventing duplication of these image data and realizing enhanced copyright protection. The purpose is to provide.

[0019]

The first aspect of the present invention is as follows.
An image display device for displaying an image, comprising a plurality of wavelength light output means for outputting a plurality of different wavelength light components forming an image, and a first combination of the plurality of wavelength light output means. One image display mode and a second image display mode by a second combination of the plurality of wavelength light output units different from the first combination, and a control unit for executing switching control. The wavelength light output means of No. 1 has a configuration for executing switching display output of the first image display mode and the second image display mode on a time axis or in space under the control of the control means. And the image display device.

Further, in an embodiment of the image display device of the present invention, the wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), Y (yellow), and the first image display mode is R (red), G (green), B It is an image display mode by the three-wavelength light output means of (blue), and the second image display mode is four wavelength light of R (red), G (green), B (blue), and Y (yellow). It is characterized in that it is an image display mode by the output means.

Further, in one embodiment of the image display device of the present invention, the wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), C (cyan), and the first image display mode is R (red), G (green), B It is an image display mode by the three-wavelength light output means of (blue), and the second image display mode is four wavelength light of R (red), G (green), B (blue), and C (cyan). It is characterized in that it is an image display mode by the output means.

Further, in one embodiment of the image display device of the present invention, the wavelength light output means is R (red) or G.
(Green), B (blue), and 650 nm (nanometer)
Outputs long-wavelength red light having a wavelength of ~ 700 nm 4
The first image display mode has three wavelength light output units, and the first image display mode is an image display mode using three wavelength light output units of R (red), G (green), and B (blue). The image display mode is an image display mode by four wavelength light output means of R (red), G (green), B (blue), and the output means of the long wavelength red light.

Further, in an embodiment of the image display device of the present invention, the wavelength light output means is R (red), G
(Green), B (blue), and four wavelength light output means for outputting short-wavelength blue light having a wavelength of 400 to 430 nm, and the first image display mode is R (red), G
(Green), B (blue) is an image display mode by three wavelength light output means, the second image display mode is R (red),
It is characterized in that it is an image display mode by four wavelength light output means of G (green), B (blue), and the output means of the short wavelength blue light.

Further, in an embodiment of the image display device of the present invention, the image display device is based on electronic watermark information, and the electronic watermark pattern according to the first image display mode and the second image display mode. Is generated, and switching display output of the first image display mode and the second image display mode is executed on the time axis or in space according to the generated digital watermark pattern.

Further, in an embodiment of the image display device of the present invention, the control means includes the first image display mode and the second image display mode for each frame forming a moving image. Is set for each fine area of each frame, and M
It is characterized in that the display mode switching area setting processing control is executed at a level that hinders motion vector detection based on frame correlation in PEG compression.

Further, in an embodiment of the image display device of the present invention, the image display device has a conversion table applied to the conversion process of the display mode for the input image data, and the control means stores the conversion table in the conversion table. It is characterized in that it is configured to execute switching processing between the first image display mode and the second image display mode based on the above.

Further, a second aspect of the present invention is an image display method for displaying an image, which is a first set of a plurality of wavelength light output means for outputting a plurality of different wavelength lights forming an image. A first image display mode by combination, and the first
Control step for executing switching control between the second image display mode by the second combination of the plurality of wavelength light output means different from the combination, and the plurality of wavelength light output means according to the control in the control step. According to the first image display mode and the second image display mode on the time axis or space.
And a switching display step of performing switching display output of the image display mode.

Further, in one embodiment of the image display method of the present invention, the wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), Y (yellow), and the first image display mode is R (red), G (green), B It is an image display mode by the three-wavelength light output means of (blue), and the second image display mode is four wavelength light of R (red), G (green), B (blue), and Y (yellow). It is characterized in that it is an image display mode by the output means.

Further, in an embodiment of the image display method of the present invention, the wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), C (cyan), and the first image display mode is R (red), G (green), B It is an image display mode by the three-wavelength light output means of (blue), and the second image display mode is four wavelength light of R (red), G (green), B (blue), and C (cyan). It is characterized in that it is an image display mode by the output means.

Further, in one embodiment of the image display method of the present invention, the wavelength light output means is R (red), G
(Green), B (blue), and 650 nm (nanometer)
Outputs long-wavelength red light having a wavelength of ~ 700 nm 4
The first image display mode has three wavelength light output units, and the first image display mode is an image display mode using three wavelength light output units of R (red), G (green), and B (blue). The image display mode is an image display mode by four wavelength light output means of R (red), G (green), B (blue), and the output means of the long wavelength red light.

Further, in one embodiment of the image display method of the present invention, the wavelength light output means is R (red), G
(Green), B (blue), and four wavelength light output means for outputting short-wavelength blue light having a wavelength of 400 to 430 nm, and the first image display mode is R (red), G
(Green), B (blue) is an image display mode by three wavelength light output means, the second image display mode is R (red),
It is characterized in that it is an image display mode by four wavelength light output means of G (green), B (blue), and the output means of the short wavelength blue light.

Furthermore, in one embodiment of the image display method of the present invention, the image display method further comprises the first image display mode and the second image display mode based on electronic watermark information.
A step of generating a digital watermark pattern according to the image display mode of, and the switching display step according to the generated digital watermark pattern, on the time axis or in space, the first image display mode and the second image. The present invention is characterized in that it is a step of executing display output for switching display modes.

Further, in an embodiment of the image display method of the present invention, the control step includes the first image display mode and the second image display mode for each frame forming a moving image. Is set for each fine area of each frame, and display mode switching area setting processing control is performed at a level that hinders motion vector detection based on frame correlation in MPEG compression.

Further, in one embodiment of the image display method of the present invention, the control step is based on the conversion table applied to the conversion processing of the display mode for the input image data, and the first image display mode and the first image display mode. It is characterized in that it is a step of executing a switching process to the image display mode of No. 2.

Further, a third aspect of the present invention is a computer program as an image display processing execution program, wherein the computer program outputs a plurality of light beams having different wavelengths forming an image. Switching between a first image display mode by a first combination of wavelength light output means and a second image display mode by a second combination of the plurality of wavelength light output means different from the first combination. A control step of executing control, and a switching display of the first image display mode and the second image display mode on the time axis or space by the plurality of wavelength light output means according to the control in the control step. And a switching display step for executing output, and a computer program.

[0036]

According to the present invention, display processing in which display modes are changed on the time axis or on the space, specifically, for example, RGB and R are performed.
The configuration is such that switching display such as GBY display is executed, and when an image on which this display processing has been executed is captured and played back by a video camera, different colors are alternated if the image has been switched on the time axis. In the case of an image in which a flicker is displayed, and a switching process in a space (display area) is performed, color unevenness occurs, and the image becomes unbearable for viewing. In this way, it is possible to reliably reflect the change in color in the image captured by the video camera and take the image, causing the quality of the reproduced image of the captured image to deteriorate.
It is possible to effectively prevent illegal copying and redistribution of image data. Further, according to the image display device and the image display method of the present invention, it is possible to reliably reflect a data change that is hardly recognized in a normal macroscopic observation state in an image captured by a video camera and capture the captured image.

Further, in the image display device and the image display method of the present invention, the display processing in which the display mode is changed on the time axis or the space, for example, the switching display of RGB and RGBY display is applied as the electronic watermark information. Depending on the configuration, it is possible to embed various information such as copy control information, content copyright information, content processing information, content configuration information, content processing information, content editing information, or content reproduction processing method into image data.

Further, according to the image display device and the image display method of the present invention, display processing in which the display mode is changed in the area of the image frame, for example, switching display of RGB and RGBY display is performed, and this is displayed on the two-dimensional plane. When applied as high-frequency noise of, the effect of reducing inter-frame correlation can be brought about, and the efficiency of MPEG compression for performing compression by motion vector detection based on frame correlation can be hindered. As a result, it is possible to increase the amount of data in the MPEG stream after encoding.
It is possible to effectively prevent image duplication to which G compression is applied.

The computer program of the present invention is, for example, a storage medium or communication medium provided in a computer-readable format for a general-purpose computer system capable of executing various program codes, such as a CD or FD. , MO, etc., or a computer program that can be provided by a communication medium such as a network. By providing such a program in a computer-readable format, processing according to the program is realized on the computer system.

Still other objects, features and advantages of the present invention are as follows.
It will be clarified by a more detailed description based on embodiments of the present invention described below and the accompanying drawings. In this specification, the system is a logical set configuration of a plurality of devices, and is not limited to a device in which each configuration is provided in the same housing.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION An image display apparatus and an image display method of the present invention will be described in detail below with reference to the drawings.

The configuration of an embodiment of the image display device of the present invention will be described with reference to FIG. FIG. 1 shows a configuration for displaying a color image on an image display means such as a screen or a display screen such as a CRT.
(A) is a color image display device configuration using a conventional RGB three primary color projector or electron gun. An image display surface 104 such as a screen or a display screen such as a CRT has an R projector (or R electron gun) 101 for red light emission, a G projector (or G electron gun) 102 for green light emission, and a B for blue light emission. The projector (or B electron gun) 103 emits light of wavelengths corresponding to the respective colors, and a color image is presented to a viewer who observes the image display surface 104.

In the following description, the image display surface 104 is the screen 104, and a color image is displayed on the screen 104 by using a projector of each color. However, the present invention can be similarly applied to color image display on a display screen such as a CRT.

The R projector 101 for red light emission outputs light of a wavelength of about 650 nm (nanometer), the G projector 102 for green light emission outputs light of a wavelength of about 546 nm (nanometer), and the B projector for blue light emission. Projector 1
03 outputs light with a wavelength of about 435 nm (nanometer). These lights will be observed by being fused with the eyes of the viewer, and as a result, they will be observed as a color image in the visible light region of approximately 400 to 700 nm.

FIG. 1 (b) shows a structure according to an embodiment of the image display device of the present invention, and like FIG. 1 (a), it is a structure for displaying a color image on an image display means such as a screen. Yes, in addition to the conventional RGB three-primary-color projector, a Y projector 1 for yellow emission as a fourth light source
14 is a color image display device configuration having 14. The R projector 111 for red light emission outputs light with a wavelength of about 650 nm (nanometer), the G projector 112 for green light emission outputs light with a wavelength of about 546 nm (nanometer), and the B projector for blue light emission. 113 is about 43
The Y projector 115 for emitting yellow light emits light having a wavelength of 5 nm (nanometer), and is about 580 nm (nanometer).
The light of the wavelength is output. These lights will be fused and observed by the viewer's eyes, resulting in almost 400
It is observed as a color image in the visible light range of ˜700 nm.

The image display device of the present invention is provided with an R for red light emission.
Projector 111, G projector 11 for green light emission
2. The B projector 113 for blue light emission and the Y projector 114 for yellow light emission are selectively used.

The modes of selective use are (A) RGB color display (B) RGBY color display, and these two modes (A) and (B) are switched on the time axis. Processing such as use or switching in space, that is, dividing the image display area and displaying in different display modes for each division, is performed. Details of these will be described later.

The difference between the above two display modes of (A) RGB color display and (B) RGBY color display will be described. Figure 2
Is an xy chromaticity diagram developed by the CIE in 1931.
The xy axes in the figure are the parameters x defined by CIE,
It is the value of y.

Here, a point 201 on the chromaticity diagram shown in FIG.
It is assumed that the color of (star) is displayed. The color of point 201 (star) corresponds to yellow at 580 nm. This 580
There are two processing methods for displaying the nm color.

The first method is (A) R (650 nm) and G (5) as processing corresponding to color display by RGB.
The second method is a process of irradiating light only from Y (580 nm) as a process corresponding to (B) RGBY color display.

The light of yellow = 580 nm displayed by these two different display methods will be recognized as almost the same color of yellow = 580 nm by the naked eye.

However, suppose that the video camera captures the yellow color displayed by the two different display methods. The video camera is configured with a filter for performing color separation into three colors of RGB, passes input light through a filter having sensitivity corresponding to RGB, recognizes as RGB signals according to the passing light, and records the RGB signals. It is configured.

The spectral sensitivity characteristic of the filter for color separation into the three RGB colors in the video camera has, for example, the characteristic shown in FIG. The horizontal axis represents wavelength and the vertical axis represents spectral sensitivity. R
In a video camera that detects each of the so-called ternary colors of GB, blue (B) has a sensitivity characteristic having an apex of approximately 435 nm, green (G) having a sensitivity characteristic having an apex of approximately 546 nm, and approximately 650 nm has an apex. With the red (R) filter and the image pickup device having the above-mentioned sensitivity characteristic, the wavelength light in the region of about 300 to 800 nm is photographed.

When the photographed image is an image displayed on the screen and the above-mentioned (A) RGB color display is used, the wavelength light used is the wavelength light of 650 nm by the R projector for red emission, and the green light. Light of 546 nm wavelength emitted by the G projector for light emission and light of 435 nm wavelength emitted by the B projector for blue light emission, which are wavelengths corresponding to the filters of the video camera, so that color image recording and reproduction with almost fidelity are possible. Is possible.

That is, as a process corresponding to the yellow color by the first method described above, that is, (A) RGB color display, a process of irradiating an appropriate amount of light from R (650 nm) and G (546 nm) light sources. The yellow in the case of, even in the image taken by the video camera,
Exactly the same yellow, that is, as RGB color display,
Since it is executed as an irradiation process of an appropriate amount of light from the R (650 nm) and G (546 nm) light sources, almost faithful color reproduction is possible.

On the other hand, in the case where the process corresponding to the yellow color by the above-mentioned second method, that is, the process corresponding to (B) RGBY color display, is the process of irradiating light only from Y (580 nm), this is video. When shooting with a camera, the video camera does not have a filter corresponding to Y (580 nm), and the video camera does not have a filter corresponding to Y (580 n).
The input light of m) is processed as the light passing through the R (650 nm) and G (546 nm) filters.

However, as can be understood from the spectral sensitivity characteristic diagram of the video camera of FIG.
Although the light of m is allowed to pass through in an appropriate amount, the pass ratio of the R filter is considerably lowered. As a result, in the video camera, as compared with the recording level of the G signal, R
When the recording level of the signal becomes extremely low and this recording signal is reproduced, light having a wavelength deviated from the input signal (580 nm) to the G side, that is, greenish yellow, is reproduced as a so-called yellow-green reproduction color. Become.

As a result, as the above-mentioned two image display processes, that is, the first method: (A) a process corresponding to RGB color display, an appropriate amount of light is emitted from the R (650 nm) and G (546 nm) light sources. The process of irradiating light, the second method: (B) the process of irradiating light only from Y (580 nm) as a process corresponding to RGBY color display. Will be different, and different colors will be reproduced in the reproduced image. In general, the color filter of a video camera has characteristics different from those of human eyes at wavelengths near the boundaries of the three colors of RGB, and the characteristics vary depending on the model. Therefore, the above method is a phenomenon that occurs in almost all video cameras currently in circulation.

Next, a display processing mode in the image display device of the present invention will be described. The image display device of the present invention is
As shown in FIG. 1 (b), about 650 nm (nanometer)
R projector 11 for emitting red light having a wavelength of
1. G projector 112 for green light emission that outputs light of wavelength of about 546 nm (nanometer), B projector 113 for blue light emission that outputs light of wavelength of about 435 nm (nanometer), and light of wavelength of about 580 nm (nanometer) The Y projector 115 for yellow light emission is provided, and the two processes of (A) RGB color display (B) RGBY color display described above are selectively executed.

An example of switching and executing two display methods in a time division manner will be described with reference to FIG. As shown in FIG. 4, (A) RGB color display, and (B) R
The color display by GBY is switched and executed at predetermined time intervals.

At times t0 to t1, RGB color display, at times t1 to t2, RGBY color display, at times t2 to t3, RGB color display, and so on. To execute.

As described above, when the RGB display processing and the RGBY display processing are performed in a time-division manner and the color of the point 201 (star mark) on the chromaticity diagram shown in FIG. 2 is displayed, the same yellow color for human eyes. Appears to be continuously displayed, but when recorded with a video camera, yellow and yellow-green colors alternate and flicker occurs.

Further, an example in which the two display methods are switched and executed depending on the image display area will be described. As shown in FIG. 5, for example, the image display area on the screen is divided into two areas, and in the image area 301,
(A) Color display by RGB is executed, and the image area 30
In 2, (B) RGBY color display is executed.

Even in this display process, a uniform display appears to the human eye, but in the image re-captured by the video camera, for example, the point 201 on the chromaticity diagram shown in FIG. 2 is displayed. When the color of (star) is displayed, color unevenness will occur.

Thus, in the image display device of the present invention,
In the mode shown in FIG. 4 and FIG. 5, the display process with different display modes on the time axis or the space is executed. When an image that has undergone such display processing is shot with a video camera and played back, if the image has undergone switching processing on the time axis, different colors are displayed alternately, causing flicker and The image becomes unbearable, and in the case of an image that has undergone a switching process in the space (display area), color unevenness occurs and similarly the image becomes unbearable.

As described above, by the image display processing by the image display device of the present invention, it becomes possible to reliably reflect the color change, which is hardly recognized in the normal naked-eye observation state, in the image picked up by the video camera and to photograph it. By causing the quality deterioration of the reproduced image of the captured image, it is possible to effectively prevent illegal duplication and redistribution of the image data.

FIG. 6 is a block diagram showing the configuration of the image display device of the present invention. The data input unit 511 inputs RGB color image data to the switching control unit 512. The switching control unit 512 uses a preset switching method,
For example, switching on the time axis described with reference to FIG.
Alternatively, control according to each method such as switching in the display space described with reference to FIG. 5 is performed.

(A) When performing color display by RGB, the RGB signal level value is output to the data output unit 515, and the data output unit 515 controls each RGB projector of the projector 516 according to the input RGB signal value. Then, the screen 520 is irradiated with RGB color signals.

On the other hand, when performing (B) RGBY color display, the conversion processing of the input RGB signal into the RGBY signal is executed in the data conversion unit 513. The data conversion unit 513 executes data conversion processing to which the conversion table 514 is applied.

FIG. 7 shows an example of the structure of a lookup table applied to the conversion process. The example of FIG. 7 is an example in which each RGB signal is composed of 8-bit data (0 to 255), and (R, G, B) = (0, 0, 0) to (25
5,255,255) for each signal, RGBY
It is configured as a table in which the value of each signal is set.

The data conversion unit 513 applies the conversion table 514 shown in FIG. 7 to obtain the output value (R, G, B, Y) corresponding to the input data (R, G, B), and the obtained output The value (R, G, B, Y) is output to the data output unit 515,
The data output unit 515 operates the RGBY projectors of the projector 516 according to the RGBY signals to irradiate the screen 520 with signals of RGBY colors.

FIG. 8 shows a hardware configuration example of the conversion table 514 and the data output unit 515 of the data conversion unit 513 shown in FIG.

As shown in FIG. 8, the input signal 781 is R
The conversion table 51 is input as GB 8-bit signals.
4 is stored in the memory 701 and is also input to the selectors 722, 723, 724 corresponding to the respective signals.

From the memory, input values (R, G, B) for each 8
For example, the table search described with reference to FIG. 7 is executed using bits as addresses, and 8 bits for each output (R, G, B, Y) are output. Each 8 bits of (R, G, B, Y) output from the memory 701 are output to the selectors 721 to 724 corresponding to each color.

The selectors 721 to 724 have original input values (R, G, B) or table-converted (R, G, B, Y) according to the selection signal based on the switching conditions such as the above-mentioned time or area. One of the two projectors 731 to 734 of each color is selected and output.
The output according to the 0-255k signal level output from 1-724 is performed.

When switching the display by time division,
It suffices to switch the selection signal to either one of two values, that is, 0 or 1 for each frame. When the display mode is spatially switched, the selection signal may be switched to either 0 or 1 according to the address in the frame.

FIG. 9 shows a selection signal setting process flow of two processes (A) RGB color display and (B) RGBY color display executed by the switching control unit in the image display device of the present invention.

In step S101, a predetermined switching method, for example, switching on the time axis described with reference to FIG. 4 or switching on the display space described with reference to FIG. The following switching determination processing is performed. When it is determined in step S102 that it is the RGBY display area or the RGBY display time, the process proceeds to step S104, the selection signal is used as the selection signal for table conversion value display, and the process proceeds to step S105 to output the selection signal to the selector.

On the other hand, in step S102, RGB
If it is determined that it is not the Y display area and RGBY display time, the process proceeds to step S103, the selection signal is used as a selection signal for input value display, and the process proceeds to step S105 to output the selection signal to the selector.

By the above-described processing, it is possible to perform display with different display modes on the time axis or space. Flicker or color unevenness occurs in the video camera captured image of the image for which such display processing is performed, and it is possible to reduce the quality of the video captured image. Effective prevention is possible. On the other hand, even when the above-mentioned switching process is executed, the directly displayed image has a color change that is hardly recognized in the normal naked eye observation state. Does not occur.

Next, in the image display device and the image display method of the present invention described above, a processing mode for embedding the electronic watermark information by applying a display in which the display mode is changed on the time axis or on the space will be described.

A mode of embedding and detecting digital watermark information will be described with reference to FIG. Figure 10
As shown in (a), for example, when the information [A] is embedded in the image 801 as a digital watermark, the embedded information [A]
Is spread spectrum with random number data PN to generate a digital watermark pattern, which is embedded in the image. The digital watermark pattern is, for example, the pattern in the image 801 of FIG.

In the configuration of the present invention, this pattern is generated as a display pattern having different display modes on the above-mentioned time axis or space and is superimposed on the content (image). For example, (1) and (-1) shown in FIG.
The image generation processing by RGBY described above is executed only in the area (1) of the data.

On the other hand, when detecting from the image in which the digital watermark is embedded, the despreading process using the random number data PN of the same PN sequence as at the time of embedding is executed. By this despreading process, an inner product value P1 of the original luminance signal frame data DV1 and the random number data PN and an inner product value P2 of the digital signal embedded luminance signal frame data DV2 and the random number data PN are obtained. It is represented by a probability density function indicating the distribution of P1 and P2, and an appropriate threshold value TH is set to detect digital watermark embedding information.

On the other hand, as a mode different from the digital watermark embedding process mode shown in FIG. 10A, there is steganography. Steganography (Ste
ganography) is a technology that hides additional information in the screen.
The superimposing process is executed.

Generally, for example, data is put in the least significant bit of bit information indicating the value of each pixel of image information, or a process such as using ink that is invisible in a general visual state, or micro processing. Change dot, character arrangement,
Although it is possible to add information in various modes such as SS communication, in the configuration of the present invention, it is generated as a display pattern in which the display modes are different on the time axis or on the space and the content (image) is generated. Superimpose on.

As shown in FIG. 10B, when the character information [A] is embedded in the image 802, for example, in the image 802, the image generation processing by RGBY described above is performed only on the portion forming the character [A]. To execute. In the detection processing, integration processing and normalization processing are executed in consecutive frames of a moving image, so that [A] as additional information
Can be extracted.

Specific embedding and detection processing of digital watermark information will be described with reference to the drawings. FIG. 11 shows
It is a figure which shows the electronic watermark information embedding process aspect by switching and displaying two processes of the above-mentioned (A) RGB color display and (B) RGBY color display on a time axis.

The level of the color-difference signal for each frame is acquired for each frame that constitutes a moving image. The signal level of the color image can be indicated as a color value such as RGB described above, but the luminance signal (y) and the color difference signals (Cb and C
It can be indicated by the signal value of r). The correspondence between the luminance signal (y), the color difference signals (Cb and Cr), and the RGB signal is expressed by the following formula, for example. y = 0.299R + 0.587G + 0.114B Cr = 0.713 (R-y) +128 Cb = 0.564 (B-y) +128

[Y] in the above equation represents a luminance signal value and is different from the above-mentioned Y (yellow) of RGBY. Figure 11
As shown in, the (A) RG
When two processes of B color display and (B) RGBY color display are switched and displayed, the average value of the full screen of the color difference signal (Cb or Cr) from the moving image display data is the frame before and after the display mode switching. At, a sharp difference occurs. Specifically, a change occurs as shown in the signal change area 805 of the average value data of each frame of the color difference signal shown in FIG.

Such a change in the color difference signal (Cb or Cr) is caused by (A) RGB color display, and (B)
This occurs when switching between the two processes of RGBY color display. The digital watermark information is detected from the moving image data by detecting this signal change and correlating it with a digital watermark pattern as shown in FIG. 11 (b) set as digital watermark information in advance. The digital watermark information is, for example, a digital watermark pattern generated by spectrum-spreading the embedded information [A] described with reference to FIG. 10 using random number data PN.

FIG. 12 shows a digital watermark information embedding processing mode by switching and displaying the above-mentioned two processes of (A) RGB color display and (B) RGBY color display in space, that is, in the image area. FIG.

For example, in the image forming frame shown in FIG. 12A, as shown in FIG. 12B, the level of the average value of the color difference signals (Cb or Cr) of each area is obtained.
When two processes of (A) RGB color display and (B) RGBY color display are switched and displayed for each frame region, the detection signal value of the color difference signal (Cb or Cr) from the image display data is It is possible to acquire different color difference signal (Cb or Cr) average value level data that is different for each area and differs depending on the image area shown in FIG. 12B, for example.

Such a change in the color difference signal (Cb or Cr) is caused by (A) RGB color display and (B)
It occurs by switching between two processes of color display by RGBY. The digital watermark information is detected from the image data by detecting the signal change corresponding to this area and taking a correlation with the digital watermark pattern as shown in FIG. The digital watermark information is, for example, a digital watermark pattern generated by spectrum-spreading the embedded information [A] described with reference to FIG. 10 using random number data PN, or steganography (a technique for hiding additional information in the screen ( Steganography), that is, a pattern generated by executing a process of directly superimposing a message as additional information on an image or the like.

FIG. 13 is a block diagram showing the arrangement of an image display device equipped with a digital watermark embedding processing device. In FIG. 13, for example, moving image data as content is supplied from the content output unit 810. On the other hand, digital watermark information in which various content-related information such as copy control information, content source information, copyright information, content processing information, content configuration information, etc. is used as digital watermark information output means 820 to embed the area. , To the frame control means 821.

Embedded area and frame control means 816
Determines a display area or a display frame for two processes of (A) RGB color display and (B) RGBY color display according to the embedded digital watermark information. The decision information is output to the RGB / RGBY switching display means 811 and the input content from the content output means 810 is displayed by RGB or RGBY display. The details of this switching configuration are as described above with reference to FIGS. 6 to 8.

Further, the display image is photographed by the image pickup means 812, and the digital watermark information detection means 813 executes the digital watermark information detection by the above correlation detection.

Next, (A) RGB color display and (B) RGBY in the image display device of the present invention.
The effect of preventing illegal duplication of an MPEG compressed image by switching and displaying the two color display processes according to (1) will be described.

As shown in FIG. 14, two display modes of (A) RGB color display and (B) RGBY color display are shown for each fine region of one image frame.
For example, it is configured to switch every pixel or every plural pixels.

This processing is equivalent to adding noise having a two-dimensionally dispersed component to the image frame. By this processing, it is possible to improve the effect on the deterioration of the image quality at the time of encoding without any visual influence.

In MPEG compression, compression (encoding) or decompression (decoding) is performed for each unit group called GOP (Group of Picture) which constitutes a series of moving images. The GOP is composed of an I frame, a P frame, and a B frame.

The I frame (Intra Picture) is a GOP
It is a frame that serves as a reference when compressing or decompressing other frames in the frame, and only spatial compression is performed. Spatial compression in this I frame is performed by a discrete cosine transform (DCT) in units of 8 × 8 pixels.
e Transform). Since the I frame is only subjected to intraframe compression, this frame has a lower compression rate and a larger data amount than other frames.

In addition to intra-frame compression, P-frame (Predictive Picture) incorporates prediction only in the forward direction of the time axis and is time-based (inter-frame) compressed based on the difference from the I frame. Therefore, the P frame is decompressed from the in-frame information and the information of the preceding I frame and / or P frame. Therefore, the P frame is
The compression rate is high and the data amount is small compared to the I frame.

B frame (Bidirectionally Predictive
In addition to intraframe compression, Picture) is bidirectionally compressed on the time axis based on the difference from the previous and next frames. Therefore, the B frame has a higher compression rate than the P frame.

The above-mentioned P and B frames are frames having a strong correlation with other frames, and achieve a high compression rate based on the motion information from the images of the other frames.
At this time, a motion vector is detected as the amount of movement of the image between frames. The motion vector is obtained based on the correlation of images between frames.

Here, as shown in FIG. 14, (A) RG
Two processing areas for B color display and (B) RGBY color display are alternately finely arranged in a fine area of each image frame, and fixed setting common to each frame. When such processing is performed, the RGB color display area and the RGBY color display area do not follow the movement of the image data even if the content constituent image data moves between frames. As a result, even if an attempt is made to obtain a motion vector, the inter-frame correlation decreases and it becomes difficult to obtain the correlation in the corresponding block. As a result, highly efficient compression cannot be performed. That is, it becomes difficult to generate a B picture and a P picture using the above correlation between frames. Therefore, the efficiency of data compression can be hindered. As a result, the amount of data in the encoded MPEG stream can be increased. Therefore, particularly when the transfer bit rate of the MPEG stream is limited, the image quality after encoding is significantly deteriorated.

As described above, in the image display device of the present invention, (A) RGB color display, and (B) R
By setting two display modes of color display by GBY as shown in FIG. 14, it can be used as high-frequency noise that spreads in a two-dimensional plane, lowering the MPEG compression rate and preventing illegal duplication by MPEG compressed data. can do.

In each of the embodiments described above, RGB
The combination configuration of the signal and the RGBY signal, that is, the example in which 580 nm (Y) is set as the fourth primary color has been described, but the wavelength light set as the fourth primary color is 58
It is not limited to 0 nm (Y). For example, even if 480 nm (C = cyan) is used as the fourth primary color, the same effect as described above can be obtained.

For example, in one experimental example, cyan (C)
When the color of the LED is displayed with a single-wavelength LED, the RGB values after RGB three-color separation when taken with a camera are (57, 159, 188), respectively, while the light of the RGB three-wavelength LED is combined. Then, if the light is set to be the same color as the cyan LED and the light is taken by the camera, RG
The RGB values after B3 color separation are (62, 1
58, 170). In this way, the light synthesized from the LEDs of three wavelengths is reproduced by the camera in the color as seen with the eyes, but in the case of the LED of single wavelength light, the color shifts to the blue direction.

Thus, as the fourth primary color, 580 nm
It is also possible to apply 480 nm (C = cyan) other than (Y).

Further, as another method, the sensitivity is very low to the human eye, but high to 400 with a video camera.
a light source of blue near 700 nm and a red light near 700 nm, specifically, a long wavelength red light region having a wavelength of 650 nm (nanometer) to 700 nm or a wavelength light of a short wavelength blue light region having a wavelength of 400 to 430 nm. It can also be used as a fourth light source. In this way, by applying wavelength light in a region that is difficult to identify to the human eye, all of the above effects can be realized, and not only the color difference of the video signal but also the flicker in the brightness signal and the uneven brightness in the screen are caused. It is possible to wake up.

The present invention has been described in detail above with reference to the specific embodiments. However, it is obvious that those skilled in the art can modify or substitute the embodiments without departing from the scope of the present invention. That is, the present invention has been disclosed in the form of exemplification, and should not be limitedly interpreted. In order to determine the gist of the present invention, the section of the claims described at the beginning should be taken into consideration.

The series of processes described in the specification can be executed by hardware, software, or a combined configuration of both. When executing the processing by software, the program recording the processing sequence is installed in the memory in the computer incorporated in the dedicated hardware and executed, or the program is stored in a general-purpose computer capable of executing various processing. It can be installed and run.

For example, the program can be recorded in advance in a hard disk or a ROM (Read Only Memory) as a recording medium. Alternatively, the program may be a flexible disk or a CD-ROM (Compact Disc Read Only).
Memory), MO (Magneto optical) disk, DVD (Dig
Ital Versatile Disc), magnetic disk, semiconductor memory, or other removable recording medium can be temporarily (or permanently) stored (recorded). Such a removable recording medium can be provided as so-called package software.

The program is installed in the computer from the removable recording medium as described above, is wirelessly transferred from the download site to the computer, or is wired to the computer via a network such as LAN (Local Area Network) or the Internet. Then, the computer can receive the program thus transferred and install it in a recording medium such as a built-in hard disk.

The various processes described in the specification are
The processing may be executed not only in time series according to the description, but also in parallel or individually according to the processing capability of the device that executes the processing or the need.

[0117]

As described above, according to the image display device and the image display method of the present invention, the display processing in which the display mode is changed on the time axis or on the space, specifically, for example, RGB is used. Since the display is switched between RGBY display and RGBY display, when an image on which such display processing is performed is shot and played back by a video camera, it is different when the image is switched on the time axis. Flicker that alternate colors are displayed, resulting in an image that is unbearable for viewing. Also, if the image has undergone switching processing in the space (display area), color unevenness will occur and similarly an image that is unbearable for viewing. Becomes In this way, it is possible to reliably reflect the change in color in the image shot by the video camera and take the image, which causes deterioration in the quality of the reproduced image of the shot image, and is effective in illegally copying and redistributing image data. Can be prevented.

Further, according to the image display device and the image display method of the present invention, it is possible to reliably reflect the data change, which is hardly recognized in the normal naked-eye observation state, in the image captured by the video camera and capture it. Become.

Further, according to the image display device and the image display method of the present invention, the display processing is performed with different display modes on the time axis or space, for example, switching display between RGB and RGBY display is executed. Various information such as copy control information, content copyright information, content processing information, content configuration information, content processing information, content editing information, or content playback processing method is applied by applying the change of the display mode as digital watermark information. Can be embedded in the image data.

Further, according to the image display device and the image display method of the present invention, the display processing in which the display mode is different is performed in the area of the image frame, for example, the switching display of RGB and RGBY display is performed, and this is displayed on the two-dimensional plane. Since it is applied as the above high-frequency noise, the effect of lowering the inter-frame correlation is brought about, and it is possible to hinder the efficiency of the MPEG compression for performing the compression by detecting the motion vector based on the frame correlation. As a result, it is possible to increase the amount of data in the MPEG stream after encoding.
It is possible to effectively prevent image duplication to which EG compression is applied.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle and basic configuration of an image display device of the present invention.

FIG. 2 is an xy chromaticity diagram developed by CIE.

FIG. 3 is a spectral sensitivity characteristic diagram of a video camera.

FIG. 4 is a diagram illustrating a display mode switching process on a time axis in the image display device of the present invention.

FIG. 5 is a diagram illustrating a display mode switching process in a space (image display area) in the image display device of the present invention.

FIG. 6 is a block diagram showing a configuration of an image display device of the present invention.

FIG. 7 is an example of a table used for display mode switching applied in the image display device of the present invention.

FIG. 8 is a diagram illustrating a hardware configuration that executes a display switching process of RGB and RGBY as a display mode switching process in the image display device of the present invention.

FIG. 9 is a selection signal setting flow chart for RGB and RGBY display switching processing as display mode switching processing in the image display device of the present invention.

FIG. 10 is a diagram illustrating a digital watermark mode to be embedded in an image by switching the display mode in the image display device of the present invention.

FIG. 11 is a diagram illustrating a digital watermark embedding mode by the display mode switching on the time axis, which is executed in the image display device of the present invention.

FIG. 12 is a diagram illustrating a digital watermark embedding mode by a display mode switching in a space (display area) executed in the image display device of the present invention.

FIG. 13 is a block diagram of an image display device of the present invention, which is provided with a digital watermark embedding processing configuration.

FIG. 14 is an M executed in the image display device of the present invention.
It is a figure which shows the example of a display by switching the display mode which inhibits PEG compression.

[Explanation of symbols]

101 R projector (or R electron gun) 102 G projector (or G electron gun) 103 B projector (or B electron gun) 104 image display surface 111 R projector (or R electron gun) 112 G projector (or G electron gun) 113 B projector (or B electron gun) 114 Y projector (or Y electron gun) 115 Image display surface 511 Data input section 512 switching control unit 513 data converter 514 conversion table 515 data output section 516 projector 520 screen 701 memory 721 to 724 selector 731-734 projector 810 Content output means 811 RGB / RGBY switching display means 812 Imaging means 813 electronic watermark detection means 820 electronic watermark output means 821 Embedded region, frame control means

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 9/31 H04N 9/31 ZF term (reference) 5C060 GA01 GB02 GB06 HB07 HB23 HB27 HC11 HC16 HD00 JB06 5C080 AA01 AA10 BB05 CC03 DD30 EE20 EE26 EE29 FF09 GG09 JJ02 JJ05 JJ06 JJ07 KK43 5C082 AA03 AA34 BA34 BA35 BB51 BD07 CA12 CA76 CA81 DA71 DA87 MM00

Claims (17)

[Claims] 1. An image display device for displaying an image, comprising: a plurality of wavelength light output means for outputting a plurality of different wavelength lights forming an image; and a first of the plurality of wavelength light output means. First by the combination of
Of the image display mode and a second image display mode by the second combination of the plurality of wavelength light output units different from the first combination, the control unit executing the switching control. The wavelength light output means is configured to execute switching display output between the first image display mode and the second image display mode on a time axis or in space under the control of the control means. Image display device. 2. The wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), Y (yellow), and the first image display mode is R (red), G (green), B
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
The image display device according to claim 1, wherein the image display mode is an image display mode using four wavelength light output units of (blue) and Y (yellow). 3. The wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), C (cyan), and the first image display mode is R (red), G (green), B
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
The image display device according to claim 1, wherein the image display mode is an image display mode using four wavelength light output units of (blue) and C (cyan). 4. The wavelength light output means is R (red), G
(Green), B (blue), and 650 nm (nanometer)
Outputs long-wavelength red light having a wavelength of ~ 700 nm 4
The first image display mode includes R (red), G (green), and B.
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
The image display device according to claim 1, wherein the image display mode is an image display mode using four wavelength light output units of (blue) and the long wavelength red light output unit. 5. The wavelength light output means is R (red), G
(Green), B (blue), and four wavelength light output means for outputting short-wavelength blue light having a wavelength of 400 to 430 nm are provided, and the first image display mode is R (red), G ( Green), B
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
2. The image display device according to claim 1, wherein the image display mode has four wavelength light output means (blue) and the short wavelength blue light output means. 6. The image display device generates a digital watermark pattern according to the first image display mode and the second image display mode based on digital watermark information, and a time is generated according to the generated digital watermark pattern. On the axis or in space, the first image display mode and the second image display mode
2. The image display device according to claim 1, wherein the image display device has a configuration for performing switching display output of the image display mode. 7. The control means sets, for each frame forming a moving image, the first image display mode and the second image display mode for each fine area of each frame, and MPEG is set. The image display device according to claim 1, wherein the display mode switching region setting process control is performed at a level that inhibits motion vector detection based on frame correlation in compression. 8. The image display device has a conversion table applied to conversion processing of a display mode for input image data, and the control means uses the first conversion table based on the conversion table.
2. The configuration for executing a switching process between the image display mode of 1) and the second image display mode of claim 1.
The image display device according to. 9. An image display method for displaying an image, comprising: a first image display mode using a first combination of a plurality of wavelength light output means for outputting a plurality of different wavelength lights forming an image. , A control step of executing switching control between a second image display mode by a second combination of the plurality of wavelength light output means different from the first combination; An image display comprising: a switching display step of executing switching display output between the first image display mode and the second image display mode on a time axis or in space by the wavelength light output means. Method. 10. The wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), Y (yellow), and the first image display mode is R (red), G (green), B
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
10. The image display method according to claim 9, which is an image display mode using four wavelength light output units of (blue) and Y (yellow). 11. The wavelength light output means is R (red), G
It has four wavelength light output means for outputting light of different wavelengths (green), B (blue), C (cyan), and the first image display mode is R (red), G (green), B
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
10. The image display method according to claim 9, which is an image display mode by means of four wavelength light output means of (blue) and C (cyan). 12. The wavelength light output means is R (red), G
(Green), B (blue), and 650 nm (nanometer)
Outputs long-wavelength red light having a wavelength of ~ 700 nm 4
The first image display mode includes R (red), G (green), and B.
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
10. The image display method according to claim 9, wherein the image display mode is performed by four wavelength light output units of (blue) and the long wavelength red light output unit. 13. The wavelength light output means is R (red), G
(Green), B (blue), and four wavelength light output means for outputting short-wavelength blue light having a wavelength of 400 to 430 nm are provided, and the first image display mode is R (red), G ( Green), B
(Blue) is an image display mode by three wavelength light output means, and the second image display mode is R (red), G (green), B
10. The image display method according to claim 9, which is an image display mode by four wavelength light output units of (blue) and the short wavelength blue light output unit. 14. The image display method further includes a step of generating a digital watermark pattern according to the first image display mode and the second image display mode based on digital watermark information, wherein the switching is performed. The display step is a step of executing a switching display output between the first image display mode and the second image display mode on a time axis or in space according to the generated digital watermark pattern. Item 9
Image display method described in. 15. The control step sets, for each frame forming a moving image, the first image display mode and the second image display mode for each fine region of each frame, and MPEG is set. The image display method according to claim 9, which is a step of performing display mode switching area setting processing control at a level that inhibits motion vector detection based on frame correlation in compression. 16. The control step executes a switching process between the first image display mode and the second image display mode based on a conversion table applied to a conversion process of a display mode for input image data. The image display method according to claim 9, which is a step. 17. A computer program as an image display processing execution program, comprising:
The program includes a first image display mode by a first combination of a plurality of wavelength light output means for outputting a plurality of different wavelength lights forming an image, and the plurality of wavelengths different from the first combination. A control step for executing switching control to a second image display mode by a second combination of the light output means, and according to the control in the control step, by the plurality of wavelength light output means, on a time axis or in space. And a switching display step of executing switching display output of the first image display mode and the second image display mode.