JP2012073463A - Projector and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a projector that projects images while concealing an image requested not to show among input images.SOLUTION: When detecting a specified identification image applied to an input image, a CPU 10 extracts alternative designation information, which has an image address AD and a concealing method flag HF, from the detected specified identification image. Next, a projection part 15 is controlled such that by using, among various alternative images stored in an alternative image area DE of a RAM 12, an alternative image specified by the image address AD included in the alternative designation information, a projection image is generated, projected and displayed, the projection image having the input image concealed according to the concealing method designated by the concealing flag HF included in the alternative designation information.

Description

  The present invention relates to a projection apparatus and a program for hiding and projecting an image that is not desired to be displayed in an input image.

  2. Description of the Related Art A projection apparatus that captures and displays an output screen of a personal computer (hereinafter abbreviated as “PC”) as an input image is known. As this type of device, for example, in Patent Document 1, when the image mute instruction is generated when the PC side is in a specific operation state, such as when the presentation software is activated or activated, the projection device is “black”. A technique for projecting an “image” to temporarily stop projection display of an input image (PC output screen) is disclosed.

JP 2006-350207 A

  By the way, as in the technique disclosed in the above-mentioned Patent Document 1, simply projecting a “black image” and muting the image uniquely stops the projection display. For example, a presentation opened on the desktop screen of a PC If you want to project an image of a window frame for a project, but do not want to show the desktop screen in the background, you cannot handle it. That is, in other words, there is a problem that an image that is not desired to be displayed in the input image cannot be hidden and projected.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a projection apparatus and program capable of projecting an image that is not desired to be displayed in an input image.

  In order to achieve the above object, according to the first aspect of the present invention, a detection unit that detects a specific identification image given to an input image, and an alternative image and the alternative image from the specific identification image detected by the detection unit. Extraction means for extracting alternative designation information for specifying how to conceal the used input image, and projection control for generating and projecting a projection image in which the input image is hidden by the alternative image according to the alternative designation information extracted by the extraction means Means.

  In the invention according to claim 2 subordinate to claim 1, the detection means acquires an image area in the input image and an identification image in the image area acquired by the acquisition means. And a discriminating means for discriminating the presence or absence.

  In the invention according to claim 3, which is dependent on claim 1, the projection control means designates the substitute designation information when the substitution designation information extracted by the extraction means designates the first concealment method. A first projection control means for generating a first projection image that occupies the entire screen, the first projection control means for projecting and displaying the first projection image instead of the input image, and the alternative extracted by the extraction means When the designation information designates the second hiding method, a second projection image is generated by synthesizing the substitute image designated by the substitute designation information by arranging the substitute images around the maximum rectangle detected from the input image. And second projection control means for projecting and displaying the second projection image instead of the input image.

  In the invention according to claim 4, a detection step of detecting a specific identification image given to the input image to the computer, an alternative image from the specific identification image detected in the detection step, and an input using the alternative image An extraction step for extracting alternative designation information for designating how to hide the image, and a projection control step for generating and projecting a projection image in which the input image is hidden by the alternative image according to the alternative designation information extracted by the extraction means. It is made to perform.

  In the present invention, an image that is not desired to be shown in the input image can be hidden and projected.

It is a block diagram which shows the whole structure of the projection apparatus 100 by one Embodiment. 3 is a memory map showing a memory configuration of a RAM 12; It is a figure which shows an example of a specific identification image. It is a flowchart which shows operation | movement of the main routine which CPU10 performs. It is a flowchart which shows operation | movement of the main routine which CPU10 performs. It is a figure for demonstrating operation | movement of a main routine. It is a figure for demonstrating operation | movement of a main routine. It is a figure for demonstrating operation | movement of a main routine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A. Configuration FIG. 1 is a block diagram showing the overall configuration of the projection apparatus 100. In this figure, the CPU 10 controls the operation of the projection unit 15 that projects and displays an input image taken in via the input unit 14. The characteristic processing operation of the CPU 10 according to the gist of the present invention will be described in detail later. The ROM 11 stores various programs executed by the CPU 10 and control data. The various programs include a main routine described later.

  As illustrated in FIG. 2, the RAM 12 includes a work area WE, an alternative designation information area SE, and an alternative image area DE. In the work area WE of the RAM 12, various register / flag data used for the processing of the CPU 10 are temporarily stored. In the alternative designation information area SE, alternative designation information including an image address AD and a hiding method flag HF is temporarily stored. The image address AD designates any image (black image, pattern image, screen saver, moving image, etc.) stored in the alternative image area DE. When the concealment flag HF is “0”, a mode for hiding the entire projection surface with the alternative image is designated, and when it is “1”, a mode for hiding the periphery of the maximum rectangle (window frame) with the alternative image is designated.

  The substitution designation information is extracted by the CPU 10 from the specific identification image given to the input image supplied to the input unit 14, and is temporarily stored in the substitution designation information area SE. Here, a specific correspondence between the specific identification image and the alternative designation information will be described with reference to FIG. In the example of the specific identification image (barcode) shown in FIG. 3A, alternative designation information having only an image address AD that designates a “black image” in the alternative image area DE is extracted. The alternative designation information designating “black image” does not include the hiding flag HF, and has a mode in which the entire projection surface is uniquely hidden by the “black image”.

  In the example of the specific identification image (barcode) shown in FIG. 3B, an image address AD that designates “screen saver” in the substitute image area DE and a mode in which the entire projection surface is hidden by the substitute image are designated. Alternative designation information having a hiding method flag HF “0” is extracted. In the example of the specific identification image (QR code) shown in FIG. 3C, an image address AD that designates a “pattern image (still image)” in the alternative image area DE and a maximum rectangle (window frame). Alternative designation information having a hiding method flag HF “1” for designating a mode of hiding the surrounding area with a substitute image is extracted. In the example of the specific identification image (character string) illustrated in FIG. 3D, an image address AD that designates a “pattern image (still image)” in the alternative image area DE and a maximum rectangle (window frame). Alternative designation information having a hiding method flag HF “1” for designating a mode of hiding the surrounding area with a substitute image is extracted.

  The configuration of the embodiment will be described with reference to FIG. 1 again. In FIG. 1, the operation unit 13 selects a power switch for instructing power-on / power-off of the apparatus power source, a zoom switch for instructing enlargement / reduction of projection display, and a screen for projection display to be either landscape or portrait. In addition to the aspect ratio selection switch, various switches such as a normal projection mode or a normal projection mode switch for selecting an alternative image projection mode to be described later are provided, and an event corresponding to the switch operation is generated. Events generated by the operation unit 13 are captured by the CPU 10. The input unit 14 has an analog RGB input function and a DVI input function. Under the control of the CPU 10, the input unit 14 captures input images in various formats and supplies the input images to the projection unit 15. The projection unit 15 is configured by a known DLP method using a DMD element, and projects and displays an input image captured via the input unit 14 on a screen surface under the control of the CPU 10.

B. Operation Next, the operation of the projection apparatus 100 configured as described above will be described with reference to FIGS. The flowcharts illustrated in FIGS. 4 to 5 show the operation of the main routine executed by the CPU 10 of the projection apparatus 100. 6-8 is a figure for demonstrating an example of the operation | movement concerning the summary of this invention. When the projector 100 is powered on by the power switch operation, the CPU 10 executes a main routine, proceeds to step S1 shown in FIG. 4 and waits until an image is input to the input unit 14. When an image is input to the input unit 14, the determination result in step S1 is “YES”, and the process proceeds to step S2.

  In step S2, the projection unit 15 is instructed to project the black image (or another preset alternative image) in the alternative image area DE without projecting the input image. This prevents the image input to the input unit 14 from being projected immediately. Subsequently, in step S3, it is determined whether or not the normal projection mode switch has been turned on. When the user turns on the normal projection mode switch to perform projection display in the normal projection mode, the determination result is “YES”, and the process proceeds to step S4 to switch to the projection of a black image (or another preset alternative image). The projection unit 15 is instructed to project the input image.

  In step S5, it is determined whether or not the normal projection mode is completed. Each time the normal projection mode switch is turned on, “normal projection mode setting” and “completion (cancellation of normal projection mode)” are instructed alternately. Accordingly, in this step S5, it is determined whether or not the normal projection mode switch has been turned on in the normal projection mode to instruct completion (release) of the normal projection mode. If the normal projection mode is not completed, the determination result is “NO”, and the process returns to step S4 to continue the normal projection mode in which the input image is projected as it is.

  On the other hand, when the normal projection mode switch is turned on in the normal projection mode, thereby instructing the completion (cancellation) of the normal projection mode, the determination result in step S5 is “YES”, and the process proceeds to step S2 described above. , The projection unit 15 is instructed to project the black image (or another preset alternative image) in the alternative image area DE without projecting the input image, and the process proceeds to step S3. If the normal projection mode switch is not turned on, the determination result in step S3 is “NO”, and the process proceeds to step S6.

  In step S6, a search area image is acquired from the input image. The search area image refers to an image in the upper right area among the conveniently divided nine areas obtained by dividing the input image into three in the vertical and horizontal directions, for example. Further, the present invention is not limited to this, and the entire input image may be used as a search area. Subsequently, in step S7, it is determined whether or not there is a specific identification image in the search area image acquired in step S6. Specifically, when the specific identification image is the barcode or QR code illustrated in FIGS. 3A to 3C, whether or not the specific identification image is detected is determined based on a known image recognition process. In the case of the character string illustrated in FIG. 3D, whether or not a specific identification image is detected is determined based on a well-known character recognition process.

  If the specific identification image cannot be detected from the search area image acquired in step S6, the determination result in step S7 is “NO”, and the process returns to step S3. On the other hand, for example, when the example image shown in FIG. 6 is input, the specific identification image is detected from the search area image, the determination result in step S7 is “YES”, and the alternative images after step S8 are detected. Transition to the projection mode. When transitioning to the alternative image projection mode, first, in step S8, alternative designation information including an image address and a hiding method flag is extracted from the detected specific identification image and stored in the alternative designation information area SE of the RAM 12. Next, in step S9, it is determined whether or not the substitute image designated by the image address AD included in the extracted substitute designation information is a “black image”.

  If the substitute image designated by the substitute designation information is a “black image”, the determination result is “YES”, and the process proceeds to step S11 to project and display a projection image in which the “black image” is arranged and combined on the entire screen. After instructing the unit 15, the process proceeds to step S14 shown in FIG. Therefore, when the specific identification image (barcode) shown in FIG. 3A is provided in the upper right area of the input image shown in FIG. 6, the input image is not projected and shown in FIG. As a result, the entire screen is hidden by the “black image”.

  On the other hand, if the substitute image designated by the substitute designation information is not a “black image”, the determination result in step S9 is “NO”, the process proceeds to step S10, and the concealment flag HF included in the substitute designation information is set. It is determined whether or not it is “0”. If the hiding method flag HF included in the alternative designation information is “0”, the determination result is “YES”, and the process proceeds to step S11, where the alternative image specified by the image address AD included in the alternative designation information is replaced with the alternative image in the RAM 12. After instructing the projection unit 15 to project and display a projection image obtained by reading out from the area DE and arranging the combined substitute images on the entire screen, the process proceeds to step S14 shown in FIG. Accordingly, in this case as well, the input image is not projected, and the entire screen is projected and displayed in a form hidden by the substitute image.

  On the other hand, if the concealment flag HF included in the alternative designation information is “1”, the determination result in Step S10 is “NO”, and the process proceeds to Step S12. In step S12, the maximum rectangle (window frame) is detected from the input image. For example, in the example shown in FIG. 6, the maximum rectangle (window frame) WF in which an image for presentation is displayed is detected.

  In step S13, the substitute image designated by the image address AD included in the substitute designation information is read from the substitute image area DE of the RAM 12, and the read substitute image is the maximum rectangle (window frame) detected in step S12. After instructing the projection unit 15 to project and display the projected images that are arranged side by side around the image, the process proceeds to step S14 shown in FIG. Therefore, as shown in FIG. 8, the maximum rectangle (window frame) WF on which the presentation image is displayed is projected and displayed as it is, and the background screen is hidden by the substitute image, so that an image that is not desired to be displayed is displayed. It will be hidden and projected.

  When the projection display in the alternative image projection mode is performed, the process proceeds to step S14 illustrated in FIG. 5 to determine whether or not the normal projection mode switch is turned on. Here, it is assumed that the user has turned on the normal projection mode switch to make a transition from the alternative image projection mode to the normal projection mode. If it does so, the judgment result of the above-mentioned step S14 will become "YES", and it progresses to step S15 and instruct | indicates to the projection part 15 to project an input image as it is.

  Thereafter, the process proceeds to step S16, and it is determined whether or not the normal projection mode is completed. Each time the normal projection mode switch is turned on, “normal projection mode setting” and “completion (cancellation of normal projection mode)” are instructed alternately. Accordingly, in this step S16, it is determined whether or not the normal projection mode switch has been turned on in the normal projection mode to instruct completion (cancellation) of the normal projection mode. If the normal projection mode is not completed, the determination result is “NO”, the process returns to step S15, and the normal projection mode is continued. In contrast, when the normal projection mode switch is turned on in the normal projection mode to instruct completion (cancellation) of the normal projection mode, the determination result in step S16 is “YES”, and the above-described step S2 (FIG. Return to 4).

  On the other hand, if the normal projection mode switch is not turned on in step S14, the determination result is “NO”, the process proceeds to step S17, the search area image is acquired from the input image, and the acquired search is performed in the subsequent step S18. It is determined whether or not there is a specific identification image in the region image. If the specific identification image is not detected in the search area image, the determination result is “NO”, the process proceeds to step S19, and the previous alternative designation information stored in the alternative designation information area SE of the RAM 12 is cleared. Next, in step S20, after instructing the projection unit 15 to project the input image as it is, the process returns to step S14 described above.

  If the specific identification image is detected from the search area image of the input image, the determination result of step S18 is “YES”, and the process proceeds to step S21. In step S21, substitution designation information including the image address AD and the hiding method flag HF is extracted from the detected specific identification image and stored in the substitution designation information area SE of the RAM 12. In step S22, it is determined whether the substitute image designated by the extracted substitute designation information is a “black image”.

  If the substitute image designated by the substitute designation information is “black image”, the determination result is “YES”, and the process proceeds to step S25 to project and display a projection image in which “black image” is arranged and combined on the entire screen. After instructing 15, the process returns to step S 14 described above. Therefore, for example, when the specific identification image (barcode) illustrated in FIG. 3A is provided in the upper right region of the input image illustrated in FIG. 6, the projection of the input image is replaced with FIG. As shown in the figure, the entire screen is hidden with a “black image”.

  On the other hand, if the substitute image designated by the substitute designation information is not “black image”, the determination result in step S23 is “NO”, and the process proceeds to step S24, where the concealment flag HF included in the substitute designation information is set. It is determined whether or not it is “0”. If the concealment flag HF included in the alternative designation information is “0”, the determination result is “YES”, and the process proceeds to step S25, where the alternative image specified by the image address AD included in the alternative designation information is replaced with the alternative image in the RAM 12. After instructing the projection unit 15 to project and display a projection image obtained by reading out from the area DE and arranging the combined substitute images on the entire screen, the process returns to step S14 described above. Accordingly, in this case as well, the entire screen is projected and displayed in a form hidden by the substitute image.

  On the other hand, if the concealment flag HF included in the alternative designation information is “1”, the determination result in Step S24 is “NO”, and the process proceeds to Step S26. In step S26, the maximum rectangle (window frame) is detected from the input image. For example, in the example shown in FIG. 6, the maximum rectangle (window frame) WF in which an image for presentation is displayed is detected.

  In step S27, the substitute image designated by the image address AD included in the substitute designation information is read from the substitute image area DE of the RAM 12, and the read substitute image is the maximum rectangle (window frame) detected in step S26. After instructing the projection unit 15 to project and display the projected images that are combined around the screen, the process returns to step S14 described above. Therefore, as shown in FIG. 8, the maximum rectangle (window frame) WF on which the presentation image is displayed is projected and displayed as it is, and the background screen is hidden by the substitute image, so that an image that is not desired to be displayed is displayed. It will be hidden and projected.

  As described above, in the present embodiment, when the specific identification image given to the input image is detected, alternative designation information including the image address AD and the hiding method flag HF is extracted from the detected specific identification image. Then, among the various alternative images stored in advance, the alternative image specified by the image address AD in the alternative designation information is used to input the input image according to the hiding method designated by the hiding method flag HF in the substitution designation information. Since a hidden projection image is generated and projected, an image that is not desired to be shown in the input image can be hidden and projected.

  In addition, in the above-described embodiment, since a predetermined image area in the input image is acquired and the presence / absence of the specific identification image in the acquired image area is determined, the process of detecting the specific identification image from the input image is performed. It can be done efficiently.

  Further, in this embodiment, when the hiding flag HF of the alternative designation information is “0”, a projection image obtained by arranging and synthesizing the alternative images designated by the image address AD of the alternative designation information is projected and displayed. The entire input image can be hidden with a substitute image. Further, if the substitution designation information hiding flag HF is “1”, the substitution image designated by the image address AD of the substitution designation information is combined around the maximum rectangle (window frame) detected from the input image. In order to project and display the projected image, for example, the maximum rectangle (window frame) WF on which an image for presentation is displayed is projected and displayed as it is, and the background screen can be hidden with a substitute image.

  Note that, in the above-described embodiment, the projection image is generated by reading the substitute image specified by the substitute designation information extracted from the specific identification image in the input image among various substitute images stored in advance. Instead of this, as a mode in which commands for drawing and generating various substitute images are stored in advance, and a substitute image is drawn and generated based on the command specified by the substitute designation information extracted from the specific identification image in the input image. It doesn't matter.

  Further, in this embodiment, when the substitute image specified by the substitute designation information is a “black image”, the entire projection surface is uniquely hidden by the “black image”. When the hiding method flag HF is not provided, the mode of hiding the entire projection surface by the alternative image specified by the alternative designation information may be set as “default full hiding”.

10 CPU
11 ROM
12 RAM
DESCRIPTION OF SYMBOLS 13 Operation part 14 Input part 15 Projection part 100 Projection apparatus

Claims (4)

Detecting means for detecting a specific identification image given to the input image;
Extraction means for extracting substitute designation information for designating a substitute image and a method of hiding an input image using the substitute image from the specific identification image detected by the detection means;
A projection apparatus comprising: a projection control unit that generates and displays a projection image in which an input image is hidden by a substitution image in accordance with the substitution designation information extracted by the extraction unit. The detection means includes
Obtaining means for obtaining a predetermined image area in the input image;
The projection apparatus according to claim 1, further comprising: a determination unit that determines whether or not the specific identification image is present in the image area acquired by the acquisition unit. The projection control means includes
When the substitute designation information extracted by the extraction means designates the first hiding method, the substitute image designated by the substitute designation information generates a first projection image that occupies the entire screen. First projection control means for projecting and displaying the projected image instead of the input image;
When the alternative designation information extracted by the extraction means designates the second concealment method, the alternative image designated by the substitution designation information is combined and arranged around the maximum rectangle detected from the input image. 2. The projection apparatus according to claim 1, further comprising: a second projection control unit configured to generate the projection image and to project and display the second projection image instead of the input image. On the computer,
A detection step of detecting a specific identification image attached to the input image;
An extraction step for extracting substitute designation information for designating a substitute image and a method for hiding an input image using the substitute image from the specific identification image detected in the detection step;
And a projection control step of generating and projecting a projection image in which the input image is hidden by the substitute image in accordance with the substitute designation information extracted by the extracting means.

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