WO2017072842A1 - プロジェクタ、映像表示装置、及び映像表示方法 - Google Patents
プロジェクタ、映像表示装置、及び映像表示方法 Download PDFInfo
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Definitions
- the present invention relates to a projector, a video display device, and a video display method, and more particularly to superimposing an invisible pattern on a projected video for shape recognition of a projection target.
- Patent Document 1 One method for realizing this is described in Japanese Patent Application Laid-Open No. 2005-37771 (Patent Document 1).
- Patent Document 1 the shape of a projection target is acquired by projecting a grid with infrared light from a projector and shooting with an infrared camera.
- Patent Document 1 in a projector using a single-plate micromirror array as a light modulation element, an invisible pattern such as a grid is projected by providing a color wheel with a region through which only infrared light passes.
- a dedicated color wheel which is disadvantageous in terms of cost, and the infrared light region on the color wheel is displayed on the image display even when pattern projection is not performed. Since it is a period during which it cannot be used, there is a problem that the brightness of the projected image is reduced.
- the present invention decomposes an input image into a plurality of color component images, and projects each color component image on the same position of the projection object in a time-sharing manner.
- a projector that optically synthesizes an image of a plurality of color components on the surface of a projection object and displays an input image in color, and only a light source and light having a wavelength corresponding to each color component of the light from the light source.
- a color wheel that passes in a time-division manner, a light modulation device that modulates light from a light source that has passed through the color wheel based on a supplied color component image, and a lens that projects light modulated by the light modulation device onto a projection object
- a projection image generation circuit that decomposes the input image into images of a plurality of color components and supplies them to the light modulation device at a timing synchronized with the operation of the color wheel, and the color components are R primary colors.
- the projection image generation circuit superimposes the first superimposed image pattern on the image of the color component other than RGB and averages it in the time direction, including at least one of the three components B and color components other than RGB.
- the second superimposed video pattern generated so as to cancel the first superimposed video pattern on the surface of the projection object is configured to be superimposed on each color component video of RGB.
- FIG. 1 is a configuration diagram of a video projection system in Embodiment 1.
- FIG. 2 is a configuration diagram of an RGB color wheel that is a premise of Embodiment 1.
- FIG. 2 is a configuration diagram of an RGBW color wheel in Embodiment 1.
- FIG. It is an example of the video sequence which embedded the invisible pattern in Example 1.
- FIG. It is the figure which expanded the marker periphery in FIG. It is the figure which showed the luminance distribution before the invisible pattern embedding in Example 1.
- FIG. It is the figure which showed the luminance distribution after the invisible pattern embedding in Example 1.
- FIG. 6 is a configuration diagram of RGBCMY color wheels in Embodiment 2.
- FIG. 6 is a configuration diagram of RGBCMY color wheels in Embodiment 2.
- FIG. 10 is an example of grid pattern embedding in scene 1 in Embodiment 3.
- FIG. 10 is an example of multi-projector projection using a plurality of projectors in Example 4. It is the figure which expanded a part of overlap area
- FIG. 10 is a diagram illustrating an example of embedding a coded pattern in the fifth embodiment. It is the figure which showed the example of the disturbance pattern embedding from which the timing in Example 6 differs. It is the figure which showed the example of the interference pattern embedding timing from which the timing in Example 6 differs.
- FIG. 1 is a diagram showing a configuration example of a video projection system in this embodiment.
- reference numeral 1 denotes a projector, which performs image processing on an input image 5 and then projects it on a projection object 2.
- the projection object 2 is not only a normal flat screen but also a three-dimensional object such as a cube or a mannequin, and the projector 1 displays the input image 5 of the projection object 2. After being deformed to match the shape, it is projected on the surface of the projection object 2.
- the image projection unit of the projector has a structure based on a projector using a single-plate type micromirror array, and the parts similar to those of a projector using a single-plate type micromirror array are provided unless otherwise specified. ⁇ It is operating.
- Reference numeral 10 denotes a light source. Light emitted from the light source 10 passes through the color wheel 11, is modulated by the light modulation device 12 according to the projected image 14, and is projected onto the projection object 2 through the lens 13.
- the light modulation device 12 has a structure in which extremely small mirrors are spread on a two-dimensional plane, and each mirror has a structure in which the direction can be changed according to the value of each pixel constituting the projected image 14. An amount of light corresponding to each pixel value is projected onto the projection object 2.
- the input video is composed of the three primary colors RGB, but a single-panel projector equipped with only one light modulation device 12 cannot simultaneously modulate a plurality of color components in the video. .
- color video projection is realized by processing each color component in a time-sharing manner. That is, a color wheel 11 that rotates at high speed is disposed between the light source 10 and the light modulation device 12, and images of RGB components are projected onto the projection object 2 in a time division manner, thereby realizing color display.
- a region 800 written as R is a region that transmits only a light component having a wavelength corresponding to R and absorbs G and B. Similarly, the portions written as G and B transmit only the target light component.
- this RGB color wheel is rotated about the center 801 so that it rotates exactly once in one frame period of the input video 5
- each RGB component of the light emitted from the light source 10 is converted into a light modulation device by 1/3 frame period. 12 is irradiated.
- an R image that is an image in which only the R (red) component of the input image 5 is extracted by the sub-frame forming circuit 22 in the projection image generation circuit 20, and a G image in which only the G (green) component is extracted.
- a B image in which only the B (blue) component is extracted is generated. Since three images of R image, G image, and B image are obtained from one frame of input image, these images are called sub-frames.
- the sub-frame forming circuit 22 has a function of using the frame buffer 21 and outputting these sub-frames in a time-sharing manner with time shift.
- the projection video generation circuit 20 drives the light modulation device 12 in a time division manner by synchronizing the three RGB sub-frames generated from each frame of the input video 5 with the rotation of the color wheel 11.
- the light modulation device 12 is driven with an R subframe image
- when it is G it is driven with a G subframe image
- when it is B it is driven with a B subframe image.
- the R component, G component, and B component of the input video 5 are projected in a time division manner. Since the human eye has the property of integrating and recognizing incoming video in the time direction, RGB video projected in time division is recognized as color video if subframe switching is fast enough. It will be.
- RGB color wheel when the projection period of each color component is equal, about 1/3 of the light generated by the light source 10 is used as the projection light to the projection object 2 and the remaining 2/3 is reflected by the color wheel 11. ⁇ It will be absorbed and thrown away.
- the projection video generation circuit 20 When the RGBW color wheel is used, the projection video generation circuit 20 generates a projection video 14 having R, G, B, and W components that are visible light from the input video 5 and outputs the projection video 14 in a time-sharing manner. .
- the color expression method has a degree of freedom and color redundancy occurs.
- RGBW color wheel is used and the pixel values of RGB are made equal, if the same color and brightness as W of the same pixel value are adjusted, RGB can be projected to project white Projection may be performed with the same pixel value and white may be turned off, or RGB may be turned off and only white may be projected with the aforementioned pixel value.
- an invisible pattern is superimposed on an image using the degree of freedom and color redundancy of the RGBW color wheel.
- the luminance value (Ri, Gi, Bi) of each RGB component at the pixel position (xi, yi) on the screen and the pixel value (Rp, Gp, Bp) of each subframe , Wp) can be expressed by the following equation.
- Ri Kr x g (Rp) + Kwr x g (Wp) (Formula 1a)
- Gi Kg x g (Gp) + Kwg x g (Wp)
- Bi Kb x g (Bp) + Kwb x g (Wp) (Formula 1c)
- g () is a gamma function representing the relationship between the pixel value and the luminance, and is usually designed to be a power function.
- Kr, Kg, Kb, Kwr, Kwg, Kwb are proportional constants.
- Wp is decreased by ⁇ W.
- Ri Kr x g (Rp + ⁇ R) + Kwr x g (Wp – ⁇ W) (Formula 2a)
- Gi Kg x g (Gp + ⁇ G) + Kwg x g (Wp – ⁇ W) (Formula 2b)
- Bi Kb ⁇ g (Bp + ⁇ B) + Kwb ⁇ g (Wp ⁇ W) (Formula 2c) It is possible to uniquely determine a set of ⁇ R, ⁇ G, and ⁇ B that satisfies the above.
- FIG. 3 is a diagram in which subframe images corresponding to the RGBW color wheel are arranged in the horizontal direction in time series. Marker 110 is embedded in R subframe 100 of frame N, marker 111 is embedded in G subframe 101, marker 112 is embedded in B subframe 102, and marker 113 is embedded in W subframe 103. An enlarged view of the periphery of the marker 110 in the R subframe 100 is shown in FIG.
- FIG. 5 is a graph of pixel values of the projected video before embedding the marker
- FIG. 6 is a graph of pixel values of the projected video after embedding the marker.
- the pixel value of the coordinates (xi, yi) is (Rp, Gp, Bp, Wp) in FIG. 5, and (Rp + ⁇ R, Gp + ⁇ G, Bp + ⁇ B, Wp ⁇ W) in FIG.
- Each subframe is projected in a time-sharing manner, but if the period is sufficiently short, it is recognized as an image in which the luminance of each subframe is averaged by the integration effect of the human eye. In this case, ⁇ R + ⁇ G + ⁇ B and ⁇ W are canceled, and the luminance before and after the marker embedding is (Ri, Gi, Bi), and does not change depending on the presence or absence of the marker. That is, the markers 110 to 113 embedded in each subframe in FIG. 3 are invisible markers that are not visible to the human eye.
- the marker image is obtained by superimposing the input image 5 on the captured image of the camera, pattern matching or the like is performed by an image analysis circuit that analyzes the captured image such as the pattern detection circuit 31 and the parameter calculation circuit 32 shown in FIG. It is possible to detect the marker coordinates using the above method. If the input video 5 includes a pattern similar to a marker, the pattern matching malfunction can be reduced by changing the shape of the superimposed marker to another.
- the invisible pattern embedded in the present embodiment is not limited to this, and a pattern having an arbitrary shape can be embedded.
- a usage example when embedding a regular pattern such as a grid is shown below.
- FIG. 7 is a diagram in which the sub-frame images corresponding to the RGBW color wheel are arranged in the horizontal direction in time series.
- a grid-like grid pattern is superimposed on each subframe in the same manner as the cross marker described above. That is, grid 120 is embedded in R subframe 100 of frame N, grid 121 is embedded in G subframe 101, grid 122 is embedded in B subframe 102, and grid 123 is embedded in W subframe 103.
- the grid pattern can be photographed without showing unnecessary grid display to a person viewing the three-dimensional object to be measured.
- the grid pattern superposition shown in FIG. 7 makes it possible to perform 3D measurement without showing an unnecessary grid display to a person viewing a three-dimensional object to be measured.
- this embodiment embeds an invisible pattern that is invisible to the human eye in the video and shoots the video in synchronism with the rotation of the color wheel using a camera. Make it identifiable.
- the input image is decomposed into a plurality of color component images, and each color component image is projected on the same position of the projection object in a time-sharing manner.
- a projector that optically synthesizes an image and displays an input image in color, and passes through a light source, a color wheel that passes only light of a wavelength corresponding to each color component of the light from the light source in a time-sharing manner, and the color wheel.
- a light modulation device that modulates light from the light source based on the supplied color component image, a lens that projects light modulated by the light modulation device onto the projection target, and an input image that is decomposed into multiple color component images
- a projection video generation circuit that supplies the light modulation device with timing synchronized with the operation of the color wheel, and the color components are at least one of three primary RGB components and one of the non-RGB color components.
- the first superimposed video pattern is superimposed on the video of the color components other than RGB, and the first superimposed video pattern is canceled on the surface of the projection target when averaged in the time direction.
- the second superimposed video pattern generated in this way is configured to be superimposed on each RGB color component video.
- the present invention is an image display device that displays a color image by dividing an input color image into four or more color component images and displaying them in a time-division manner.
- the display image is averaged over a period of one frame period in the time direction.
- a video generation circuit that superimposes the superimposed video patterns that cancel each other on each color component video of four or more colors.
- an image display method for displaying a color image by dividing an input color image into four or more color component images and displaying them in a time division manner, and averaging the display image for one frame period in the time direction.
- a pattern that cancels each other is superimposed on each color component image.
- the present embodiment is not limited to this, and there is a degree of freedom and color redundancy between the color components of each subframe. The point which can be realized even with a color wheel of a combination of different colors will be described.
- FIG. 8 shows an example of the RGBCMY color wheel used in this embodiment.
- R is red
- G is green
- B is blue.
- CMY is a complementary color of each of C: cyan, M: magenta, and Y: yellow.
- These complementary colors can be made by mixing RGB. For example, it is possible to generate Y: yellow by mixing R: red and G: green. By utilizing this fact, it is possible to embed an invisible pattern as in the first embodiment.
- the relationship between the pixel value of each subframe before embedding the marker and the luminance is as follows.
- FIG. 9 is a graph of pixel values of a projected video before embedding a marker
- FIG. 10 is a graph of pixel values of a projected video after embedding a marker.
- the B, C, and M components are not affected by the above-described marker embedding, and are therefore omitted in these drawings.
- the pixel values of the projected image 14 at the coordinates (xi, yi) are (Rp, Gp, Bp, Cp, Mp, Yp) in FIG. 9 and (Rp + ⁇ R, Gp + ⁇ G, Bp, Cp, Mp, Yp ⁇ Y) in FIG. ( ⁇ B is 0).
- Each subframe is projected in a time-sharing manner, but if the period is sufficiently short, it is recognized as an image in which the luminance of each subframe is averaged by the integration effect of the human eye. That is, ⁇ R + ⁇ G and ⁇ Y are canceled, and the marker embedded in each subframe becomes an invisible marker that cannot be seen by human eyes.
- this projected video is shot with a camera with a fast shutter speed, there is almost no integration effect, so a video with markers superimposed is shot.
- RGBCMY color wheel it is possible to embed a pattern not only between R, G and Y but also by using the degree of freedom and color redundancy between G, B, C and R, B, M. .
- FIG. 11 shows an example.
- FIG. 11 shows a scene in which the moon and planets are reflected in the night sky.
- the night sky portion is completely black, that is, when the pixel values of all components are 0, a pattern cannot be embedded in this portion.
- an invisible pattern here, a grid pattern
- each color component is 8 bits wide and can take a value of 0 to 255, it is determined by the following formula whether the area can be embedded by the pattern defined by the formulas 2a to c when the RGBW color wheel is used. can do.
- a region where all of the equations 5a to 5d are satisfied is a region where a pattern can be embedded.
- a video sequence is created by embedding a pattern at a different position for each scene, as shown in FIG. 11 or FIG. It is possible to embed a pattern in the entire screen as a whole. If the shape and position of the projection object does not change with time, or if the rate of change is so slow that it can be ignored, the pattern is sequentially embedded in the entire projection area in this way, and this is used for 3D measurement, etc. Can be done.
- the invisible marker can be embedded in the projected video, in multi-projector projection, the overlapping area of the video may shift with time after installation / adjustment due to the effects of vibration, projector weight, etc. It is also possible to perform the correction without affecting the video content being projected. In the present embodiment, an example for realizing this will be described.
- FIG. 13 shows an example of multi-projector projection using two projectors in this embodiment.
- a horizontally long image 70 is projected on the horizontally long screen 4 using two projectors A and B.
- the video divider 3 cuts out the left and right videos 71 and 72 from the input video 70 and sends them to the projectors A and B.
- the video 71 and the video 72 are cut out so that some areas overlap in order to make the joint portion inconspicuous.
- the projectors A and B have the same internal configuration as the projector 1 in FIG. 1 and are connected to the video divider 3 and the control PC 7 via the control bus 6.
- Projectors A and B project the input images 71 and 72 on the screen 4 so as to overlap each other as 73 and 74. At this time, the geometric conversion circuit 24 in each projector corrects trapezoidal distortion and adjusts the projection size and position.
- the geometric transformation parameters given to the geometric transformation circuit 24 should be adjusted only once by projecting the test pattern when the projectors A and B and the projection object 2 are installed. Since the projector projection position gradually shifts over time due to changes in the installation angle due to its own weight, the influence of vibrations, etc., it is necessary to periodically adjust the geometric conversion parameters.
- geometric transformation if the coordinates of four points in the input video and corresponding coordinates in the projected video after applying geometric transformation can be obtained, geometric transformation parameters can be obtained by solving simultaneous equations. Is possible. A method of realizing this using an invisible marker will be described with reference to FIG.
- FIG. 14 is an enlarged view of the periphery of the lower region 75 of the overlap region in FIG.
- the marker 400 is an invisible marker projected by the projector A
- the marker 401 is an invisible marker projected by the projector B. Both of these markers are embedded at the coordinates corresponding to the point 402 in the input image 70, and should be completely overlapped if the image 73 and the image 74 are accurately superimposed. That is, by adjusting the perspective transformation parameter so that the marker 400 and the marker 401 coincide with each other, it is possible to overlap the overlap regions without deviation.
- the marker 400 and the marker 401 are photographed using the camera 30 mounted on the projector A.
- This camera does not necessarily have to be built in the projector, and an external camera connected to the control PC 7 may be used.
- the shooting timing is sent from the projector A to the control PC 7 via the control bus 6.
- the control microcomputer 42 mounted on the projector A updates the geometric transformation parameter so that the distance between the projection position of the marker 400 and the marker 401 is reduced, and performs the feedback process to thereby change the projection position of the marker 400 and the marker 401. It is possible to match the projected images 73 and 74 without deviation.
- the same processing can be performed by detecting the position of each marker from a plurality of images.
- an example of projecting a pattern in which a URL or the like is encoded such as a two-dimensional barcode, will be described as an invisible pattern to be embedded in a projected image of a projector.
- FIG. 15 is a diagram showing an example of embedding a coded pattern in this embodiment.
- FIG. 15 in a scene in which all black and others exist as shown in the left figure, it is possible to embed a two-dimensional barcode as an invisible pattern in a non-black part as shown in the right figure.
- the projected images shot by a camera such as a smartphone are posted on social media etc. Even when it is not desired to be diffused, it is effective to embed an invisible pattern as a disturbing pattern by the method described so far. This embodiment will explain this.
- FIG. 16 is a diagram showing an example of embedding interference patterns with different timings in this embodiment.
- the obstructing patterns 510 to 513 can be embedded as invisible patterns at different positions of the non-black part as shown in the right figure.
- characters are embedded, but the entire screen may be embedded while changing a pattern position such as a stripe.
- the timing for shooting with the camera cannot be limited as in the fifth embodiment.
- this embodiment is implemented.
- the interference pattern when a plurality of images are taken at different timings, it is required that the interference pattern be reflected in all the photos.
- this is realized by embedding a plurality of invisible patterns at different timings at different positions of the projected image of the projector.
- FIG. 17 shows an example in which these interference patterns are embedded in different subframes.
- a jamming pattern 510 is embedded using R, G, B, and W subframes of frame N
- a jamming pattern 511 is a G, B, and W subframe of frame N and an R subframe of frame N + 1.
- the interference patterns with different embedding positions are embedded while sequentially shifting the embedding timing in accordance with the state of embedding. As a result, if the shutter speed is high to some extent (less than a few frames of the projector video), some of the interference patterns will appear in the photo no matter what timing.
- the present invention is not limited to the above-described embodiments, and includes various modifications.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of each embodiment.
- each of the above-described configurations may be configured such that a part or all of the configuration is configured by hardware, or is realized by executing a program by a processor.
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Abstract
Description
投映映像生成回路20は、入力映像5の各フレームから生成したRGB三枚のサブフレームをカラーホイール11の回転に同期させて、時分割で光変調デバイス12を駆動する。すなわち、カラーホイール11がRの時に光変調デバイス12をRサブフレームの映像で駆動し、Gの時にはGサブフレーム、Bの時にはBサブフレームの映像で駆動することで、投映対象物2には入力映像5のR成分、G成分、B成分が時分割で投映されることになる。人間の目は、入ってきた映像を時間方向に積分して認識する性質があるため、サブフレームの切り替えが十分に高速であれば、時分割に投映されたRGB映像はカラー映像として認識されることになる。
本実施例では、RGBWのカラーホイールの持つ自由度および色冗長性を利用して不可視パターンを映像に重畳する。ここで、説明を簡単にするために、R:G:B:W=1:1:1:0としたときと、R:G:B:W=0:0:0:1としたときに投映対象物2上の色および輝度が一致するようにカラーホイール11を調整してある場合を考える。実際にはこの条件が成り立たなくても、事前に画素値を補正する処理を加えることにより、本実施例の方式を利用することが可能である。
Gi = Kg×g(Gp) + Kwg×g(Wp) …(式1b)
Bi = Kb×g(Bp) + Kwb×g(Wp) …(式1c)
ここで、g()は画素値と輝度の関係を表わすガンマ関数であり、通常はべき乗関数となるように設計する。Kr、Kg、Kb、Kwr、Kwg、Kwbは比例定数である。ここで、白成分の画素値WpをΔWだけ減少させる場合を考える。この場合、
Ri = Kr×g(Rp+ΔR) + Kwr×g(Wp-ΔW) …(式2a)
Gi = Kg×g(Gp+ΔG) + Kwg×g(Wp-ΔW) …(式2b)
Bi = Kb×g(Bp+ΔB) + Kwb×g(Wp-ΔW) …(式2c)
を満たすΔR、ΔG、ΔBの組を一意に定めることが可能である。これは、各サブフレームの画素値を(Rp,Gp,Bp,Wp)とした場合と、(Rp+ΔR,Gp+ΔG,Bp+ΔB,Wp-ΔW)とした場合は、各サブフレームを時分割投映して得られる投映対象物2上の映像のRGB各成分の輝度値が等しくなることを意味する。すなわち、ΔR+ΔG+ΔB=ΔWとなりお互いでキャンセルするように働く。本実施例では、このことを利用して投映映像に不可視パターンを埋め込む。
Gi = Kg×g(Gp) + Kcg×g(Cp) + Kmr×g(Mp) + Kyr×g(Yp) (式3b)
Bi = Kb×g(Bp) + Kcb×g(Cp) + Kmr×g(Mp) + Kyr×g(Yp) (式3c)
ここで、(Ri,Gi,Bi)は投映対象物2上の画素位置(xi,yi)の点におけるRGB各成分の輝度値、(Rp,Gp,Bp,Cp,Mp,Yp)はマーカー埋め込み前の画素値、g()は画素値と輝度の関係を表わすガンマ関数、Kr、Kg、Kb、Kcr、Kcg、Kcb、Kmr、Kmg、Kmb、Kyr、Kyg、Kybは比例定数である。ここでY成分の画素値をΔYだけ減少させることを考える。この場合、
Ri = Kr×g(Rp+ΔR) + Kcr×g(Cp) + Kmr×g(Mp) + Kyr×g(Yp-ΔY) (式4a)
Gi = Kg×g(Gp+ΔG) + Kcg×g(Cp) + Kmr×g(Mp) + Kyr×g(Yp-ΔY) (式4b)
Bi = Kb×g(Bp+ΔB) + Kcb×g(Cp) + Kmr×g(Mp) + Kyr×g(Yp-ΔY) (式4c)
を満たすΔR、ΔG、ΔBの組を一意に定めることが可能である。ここで、BとYは補色関係にあるため、式4cのようにY成分をΔYだけ減少させても、Biは変化しない。
0 ≦ Gp + ΔG ≦ 255 (式5b)
0 ≦ Bp + ΔB ≦ 255 (式5c)
0 ≦ Wp - ΔW ≦ 255 (式5d)
式5a~dが全て成立する領域がパターンを埋め込み可能な領域となる。
本実施例ではプロジェクタの投映映像の異なる位置に異なるタイミングで複数の不可視パターンを埋め込むことでこれを実現する。図17は、これらの妨害パターンを異なるサブフレームに埋め込む例を示している。図17において、妨害パターン510は、フレームNのR、G、B、Wのサブフレームを用いて埋め込み、妨害パターン511はフレームNのG、B、WのサブフレームとフレームN+1のRサブフレームを用いて埋め込みを行う、と行った具合に順次埋め込みタイミングをずらしながら、埋め込み位置の異なる妨害パターンを埋め込んでいく。これにより、シャッター速度がある程度高速(プロジェクタ映像の数フレーム分以下)であれば、どのようなタイミングで撮影しても、妨害パターンのいくつかが写真に写り込むようになる。
Claims (13)
- 入力映像を複数の色成分の映像に分解し、各色成分の映像を投映対象物の同一の位置に時分割で投映することによって、前記投映対象物の表面に複数の前記色成分の映像を光学的に合成し前記入力映像をカラー表示するプロジェクタであって、
光源と、
前記光源からの光の各色成分に対応する波長の光のみを時分割で通過させるカラーホイールと、
前記カラーホイールを通過した前記光源の光を供給された色成分映像に基づいて変調する光変調デバイスと、
前記光変調デバイスによって変調された光を前記投映対象物へ投射するレンズと、
前記入力映像を複数の色成分の映像に分解して、前記カラーホイールの動作と同期したタイミングで前記光変調デバイスへ供給する投映映像生成回路を備え、
前記色成分は三原色であるRGBの3成分とRGB以外の色成分を少なくとも1つ含んでおり、
前記投映映像生成回路において、前記RGB以外の色成分の映像に第1の重畳映像パターンを重畳すると共に、時間方向で平均したときに前記投映対象物の表面上で前記第1の重畳映像パターンを打ち消すように生成した第2の重畳映像パターンをRGBの各色成分映像に重畳することを特徴とするプロジェクタ。 - 請求項1に記載のプロジェクタであって、
前記投映対象物に投映された映像を撮影するカメラと、
該カメラで撮影した映像を解析する映像解析回路を備え、
前記カメラは前記カラーホイールの動作に同期して撮影を行うことによって、前記RGB以外の色成分の映像が前記投映対象物に投映されている期間の映像を撮影し、前記映像解析回路によって撮影映像中から前記第1の重畳映像パターンの投映位置を求めることを特徴とするプロジェクタ。 - 請求項2に記載のプロジェクタであって、
前記投映映像生成回路は、前記第1の重畳映像パターンの投映位置を用いて、前記入力映像に対して前記投映対象物の投映面の形状および向きに適合するように幾何変換を実施した第2の投映映像を生成し、
前記光変調デバイスと前記レンズを介して前記投映対象物へ前記第2の投映映像を投映することを特徴とするプロジェクタ。 - 請求項1から3の何れか1項に記載のプロジェクタであって、
前記RGB以外の色成分とは白色またはシアン、マゼンダ、イエローのいずれかであることを特徴とするプロジェクタ。 - 入力されたカラー映像を4色以上の色成分映像に分割して時分割で表示することでカラー映像を表示する映像表示装置であって、
表示映像を時間方向に1フレーム周期の期間平均化した際に互いに打ち消し合う重畳映像パターンを前記4色以上の各色成分映像に重畳する映像生成回路を有することを特徴とする映像表示装置。 - 請求項5に記載の映像表示装置であって、
前記表示されたカラー映像を撮影するカメラと、
該カメラで撮影した映像を解析する映像解析回路を備え、
前記カメラは前記1フレーム周期に同期して撮影を行うことによって、前記重畳映像パターンが重畳されている色成分映像を撮影し、前記映像解析回路によって撮影した映像から前記重畳映像パターンの重畳位置を求めることを特徴とする映像表示装置。 - 請求項6に記載の映像表示装置であって、
前記映像生成回路は、前記重畳映像パターンの重畳位置を用いて、前記入力されたカラー映像に対して幾何変換を実施した表示映像を生成することを特徴とする映像表示装置。 - 請求項5から7の何れか1項に記載の映像表示装置であって、
前記4色以上の色成分映像とは、RGBと少なくとも白色またはシアン、マゼンダ、イエローのいずれかの色成分映像であることを特徴とする映像表示装置。 - 請求項5に記載の映像表示装置であって、
前記入力されたカラー映像は時間と共に内容が変化する一連の映像シーケンスを構成しており、
前記映像生成回路は、各映像において、前記重畳映像パターンの重畳に適した領域を特定し、前記重畳に適した領域に前記重畳映像パターンを重畳し、
前記映像解析回路は、前記重畳映像パターンが重畳された領域で前記重畳映像パターンの重畳位置を求める処理を行い、
これを前記映像シーケンス全体に対して順次実施することで、映像表示領域全体の重畳パターンを取得することを特徴とする映像表示装置。 - 請求項5に記載の重畳映像パターンを重畳した映像の撮影に使用されるカメラであって、
撮影時に異なるタイミングで複数枚の静止画を撮影し、前記複数枚の静止画から前記重畳パターンが識別しやすい映像を選んで重畳パターン情報の取得を行うことを特徴とするカメラ。 - 請求項5に記載の映像表示装置であって、
表示映像中に重畳位置と重畳期間を変えた複数の重畳映像パターンを埋め込むことで、前記複数の重畳映像パターンのうちの少なくとも1個以上の重畳映像パターンが、表示映像を撮影するタイミングによらず、撮影される映像に含まれるようにしたことを特徴とする映像表示装置。 - 請求項5に記載の映像表示装置を複数備えたマルチプロジェクタ投映システムであって、
前記重畳映像パターンを用いて、前記映像表示装置の各表示映像の重ね合わせ領域の位置ずれを、映像を表示しながら補正できることを特徴とするマルチプロジェクタ投映システム。 - 入力されたカラー映像を4色以上の色成分映像に分割して時分割で表示することでカラー映像を表示する映像表示方法であって、
表示映像を時間方向に1フレーム周期期間平均化した際に互いに打ち消し合うパターンを各色成分映像に重畳することを特徴とする映像表示方法。
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| JP2007199351A (ja) * | 2006-01-26 | 2007-08-09 | Nikon Corp | 表示システム、表示装置およびカメラ |
| WO2009142015A1 (ja) * | 2008-05-21 | 2009-11-26 | パナソニック株式会社 | プロジェクタ |
| WO2012120853A1 (ja) * | 2011-03-04 | 2012-09-13 | 国立大学法人徳島大学 | 情報提供方法および情報提供装置 |
| JP2015156663A (ja) * | 2012-12-27 | 2015-08-27 | パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカPanasonic Intellectual Property Corporation of America | 表示方法、表示装置およびプログラム |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2017154628A1 (ja) * | 2016-03-11 | 2019-02-07 | ソニー株式会社 | 画像処理装置および方法 |
| JP7074052B2 (ja) | 2016-03-11 | 2022-05-24 | ソニーグループ株式会社 | 画像処理装置および方法 |
| CN110870317A (zh) * | 2017-06-30 | 2020-03-06 | Vid拓展公司 | 用于使用基于立方体贴图的投影的360度视频质量评估的加权至球面均匀psnr |
| CN110870317B (zh) * | 2017-06-30 | 2023-05-23 | Vid拓展公司 | 用于对360度视频内容进行编码的方法和装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108353154A (zh) | 2018-07-31 |
| JPWO2017072842A1 (ja) | 2018-07-26 |
| US20180309968A1 (en) | 2018-10-25 |
| JP6630363B2 (ja) | 2020-01-15 |
| CN108353154B (zh) | 2020-11-20 |
| US10244216B2 (en) | 2019-03-26 |
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