WO2010116836A1 - マルチプロジェクションディスプレイシステム及び画面形成方法 - Google Patents
マルチプロジェクションディスプレイシステム及び画面形成方法 Download PDFInfo
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- WO2010116836A1 WO2010116836A1 PCT/JP2010/053833 JP2010053833W WO2010116836A1 WO 2010116836 A1 WO2010116836 A1 WO 2010116836A1 JP 2010053833 W JP2010053833 W JP 2010053833W WO 2010116836 A1 WO2010116836 A1 WO 2010116836A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3197—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using light modulating optical valves
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1066—Beam splitting or combining systems for enhancing image performance, like resolution, pixel numbers, dual magnifications or dynamic range, by tiling, slicing or overlapping fields of view
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
- H04N9/3194—Testing thereof including sensor feedback
Definitions
- the present invention relates to a rear projection type multi-projection display system for projecting images from a plurality of projectors onto a screen to form a single screen and a method for forming the screen.
- a multi-projection display system that projects images on a screen from a plurality of projectors and connects the projected images to form one screen is known.
- the display quality is greatly degraded, such as discontinuous seams between the images projected on the screen, or overlapping edges of adjacent images. End up.
- the coordinate position of each mark is detected by photographing a plurality of marks formed on the periphery of the screen or a plurality of marks projected on the screen. Describes a method of adjusting the position of a projected image with reference to the position of.
- the multi-projection display system of the background art described above is configured to detect the boundary of the projection area for each projector using marks arranged on the outer periphery of the screen.
- the multi-projection display system of the background art can be applied to form a single screen by projecting an image on the screen by two projectors, the image is projected on the screen by three or more projectors. Thus, it cannot be applied to the case of forming one screen.
- the projected image is divided into four parts and displayed on the screen. Therefore, the projection area of each projector is also displayed at the center of the screen. It is necessary to provide a mark indicating the boundary.
- the present invention provides a multi-projection display system and a screen forming method thereof capable of obtaining a projected image with little deterioration in display quality even when an image is projected on a screen by three or more projectors to form a single screen.
- the purpose is to do.
- the multi-projection display system of the present invention projects a square image on a screen from three or more projectors, and connects a plurality of projected images on the screen to form one screen.
- a multi-projection display system to be formed A mark having a higher reflectance for visible light than at least the projection area of the screen, or a reflectance for visible light different from that of the projection area, for specifying a specified position where the vertex of the projection image on the screen should be located
- a plurality of cameras each installed at a position where a photographing region including a supporting member that supports the projection region can be photographed; Based on the photographed image data obtained by photographing the photographing region with the camera, the prescribed position and the position of each vertex of the projected image are detected, and the data indicating the detected prescribed position and each of the projected image are detected.
- An image processing circuit for outputting image edge data indicating the position of the vertex; Based on the data indicating the specified position and the image edge data, when the position of the vertex of the projection image is deviated from the specified position corresponding to the vertex, the position and size of the projection image are adjusted so that they match.
- the screen forming method of the present invention is a multi-projection display that forms a single screen by projecting a rectangular image on a screen from three or more projectors and connecting the projected images on the screen.
- a screen forming method for a system Multiple cameras A mark having a higher reflectance for visible light than at least the projection area of the screen, or a reflectance for visible light different from that of the projection area, for specifying a specified position where a vertex of the projected image on the screen should be located Shoot the shooting area including the support member that supports the projection area, The control unit Based on the photographed image data obtained by photographing the photographing region with the camera, the prescribed position and the position of each vertex of the projection image are detected, and the data indicating the detected prescribed position and each of the projection image are detected.
- FIG. 1 is a schematic diagram illustrating an overall image of the multi-projection display system according to the first embodiment.
- FIG. 2 is a plan view showing a state in which an imaging region provided in the central portion of the screen shown in FIG. 1 is enlarged.
- FIG. 3 is a plan view showing an enlarged view of the photographing area provided at the center upper end of the screen shown in FIG.
- FIG. 4 is a block diagram illustrating a configuration example of the multi-projection display system according to the first embodiment.
- FIG. 5 is a flowchart showing a processing procedure of the multi-projection display system of the present invention.
- FIG. 6 is a block diagram illustrating a configuration example of the multi-projection display system according to the second embodiment.
- FIG. 7 is a schematic diagram illustrating an example of a screen included in the multi-projection display system according to the second embodiment.
- a quadrilateral image is obtained by scanning the laser beams of three colors R (red), G (green), and B (blue) projected in a horizontal direction and a vertical direction, respectively.
- the multi-projection display system of the present invention will be described by taking as an example a configuration including a plurality of laser projectors that form the projector.
- the present invention can be applied to any configuration using a two-dimensional scanning projector that forms an image on a screen using, for example, an LED (Light Emitting Diode) or other light source, and the type of the light source is changed to laser light. It is not limited.
- the configuration of the laser projector is described in, for example, Japanese Patent Application Laid-Open No. 2005-18040.
- a multi-projection display system using a two-dimensional scanning laser projector (hereinafter simply referred to as a scanning projector) will be described as an example.
- the present invention is, for example, an LCOS (Liquid It can be applied to a multi-projection display system using Crystal On Silicon) or other micro display, and does not limit the type of projector.
- a well-known trapezoid correction process or the like may be used to adjust the image range in a multi-projection display system using a micro display.
- FIG. 1 is a schematic diagram showing an overall image of the multi-projection display system according to the first embodiment.
- 2 is a plan view showing an enlarged view of the photographing area provided at the center of the screen shown in FIG. 1
- FIG. 3 is an enlarged view of the photographing area provided at the upper center of the screen shown in FIG. It is a top view which shows a mode made.
- the multi-projection display according to the first embodiment is configured to form a single screen by projecting a rectangular image on the screen 10 from, for example, four scanning projectors 11 to 14. It is.
- a plurality of cameras are installed on the back side of the screen 10 in order to detect the positions of the images projected from the scanning projectors 11 to 14.
- Each camera is installed at a position where a predetermined shooting area including the apex of a rectangular projection image projected from the scanning projectors 11 to 14 can be shot.
- nine cameras 21a to 21i are provided for photographing the vicinity of the vertex of each of the four divided projection images, and quadrangular regions (shooting regions 22a to 22i) that can be photographed by the cameras 21a to 21i are respectively provided. It is shown by surrounding it with a dotted line.
- the screen 10 includes a projection area 2 on which an image is projected from each of the scanning projectors 11 to 14, and a frame 1 surrounding the outer periphery of the projection area 2.
- the frame portion 1 is a member (supporting member) that supports the projection region 2, and may have a reflectance different from that of the projection region 2 and marks 3b, 3d to 3f, and 3h described later, and the material and the like are limited. It is not a thing.
- the shooting areas 22a to 22i by the cameras 21a to 21i are classified into three types according to their positions.
- FIG. 2 shows a configuration example of the imaging region 22e provided at the center of the screen 10.
- a mark 3e having a higher reflectance with respect to visible light than the projection region 2 is provided near the center.
- the central portion of the mark 3e is a specified position where the apex of each image projected from the scanning projectors 11 to 14 should be located.
- FIG. 3 shows a configuration example of the imaging region 22b provided at the upper center portion of the screen 10.
- the imaging region 22b is provided with a mark 3b having a higher reflectance with respect to visible light than the projection region 2 in the vicinity of the center thereof.
- the frame 3 is provided so that the frame 1 crosses and the center line is located at the boundary between the frame 1 and the projection region 2. Therefore, the size of the mark 3b is the size of the mark 3e. 1/2.
- the central portion of the boundary line between the frame portion 1 and the mark 3b is a specified position where the vertex of each image projected from the scanning projectors 11 and 12 should be located.
- An imaging area 22d provided at the center left end of the screen 10, an imaging area 22f provided near the center right end of the screen 10, and an imaging area 22h provided near the center lower end of the screen 10 are also shown in FIG.
- the configuration is the same as that of the imaging region 22b.
- no marks are formed on the imaging regions 22a, 22c, 22g, and 22i provided at the corners of the screen 10.
- the corner portion of the boundary line between the frame portion 1 and the projection region 2 is a specified position where the vertex of the image projected from the scanning projector 11 should be located.
- the corner portion of the boundary line between the frame portion 1 and the projection region 2 is a specified position where the vertex of the image projected from the scanning projector 12 should be located.
- the corner portion of the boundary line between the frame portion 1 and the projection region 2 is a specified position where the vertex of the image projected from the scanning projector 13 should be located.
- the frame The corner part of the boundary line between the part 1 and the projection area 2 is a prescribed position where the vertex of the image projected from the scanning projector 14 should be located.
- the marks 3b, 3d, 3e, 3f, and 3h change, for example, the known low-reflection processing conditions performed on the surface of the screen 10 (projection area 2), and change the reflectance of visible light in a predetermined area that becomes a mark to the projection area. It is formed by setting a value higher than 2. As described above, the marks 3b, 3d, 3e, 3f, and 3h are used to determine the specified positions where the vertices of the images projected from the scanning projectors 11 to 14 should be located, respectively. 2 so as to be included in 2.
- FIG. 4 is a block diagram illustrating a configuration example of the multi-projection display system according to the first embodiment.
- the multi-projection display system of the first embodiment includes four scanning projectors 11 to 14, a multi-projector control unit 41 that controls the operation of the scanning projectors 11 to 14, and a scanning type.
- Cameras 21a to 21i that capture predetermined imaging regions 22a to 22i including the vertices of the images projected by the projectors 11 to 14, and an image processing circuit 42 that processes captured image data captured by the cameras 21a to 21i. It has.
- the scanning projectors 11 to 14 include a laser light source (not shown), a modulator 44 that modulates the intensity of the laser light emitted from the light source in accordance with a video signal (including an image signal) corresponding to the scanning position, and the modulator 44.
- a horizontal scanning mirror 45 for scanning the emitted laser light in the horizontal direction a vertical scanning mirror 46 for scanning the laser light emitted from the modulator 44 in the vertical direction, the horizontal scanning mirror 45 and the vertical scanning mirror
- a projector control circuit 43 that generates a drive signal for operating 46 and generates a modulation signal for causing the modulator 44 to modulate the intensity of the laser light based on a video signal supplied from the outside. Since the horizontal scanning mirror 45 requires high-speed operation, for example, a vibrating mirror is used.
- the multi-projector control unit 41 divides the video signal into four and generates a video signal corresponding to an image to be displayed on each of the scanning projectors 11 to 14. .
- the multi-projector control unit 41 supplies a video signal corresponding to the display position to each of the scanning projectors 11 to 14 and transmits a frame synchronization signal indicating the scanning timing.
- the multi-projector control unit 41 may be configured to be supplied with four video signals corresponding to the scanning projectors 11 to 14. In that case, the multi-projector control unit 41 does not need to generate a video signal for each of the scanning projectors 11 to 14 described above.
- the multi-projector control unit 41 of the present embodiment transmits a shooting timing signal for instructing the shooting timing to each of the cameras 21a to 21i.
- Each projector control circuit 43 supplies a drive signal to the horizontal scanning mirror 45 and the vertical scanning mirror 46 based on the frame synchronization signal received from the multi-projector control unit 41, and based on the video signal received from the multi-projector control unit 41.
- the modulation signal generated in step (1) is supplied to the modulator 44.
- the image processing circuit 42 discriminates the frame portion 1, the projection area 2, and the marks 3b, 3d, 3e, 3f, and 3h from the captured image data obtained by capturing by each of the cameras 21a to 21i, and each scanning projector. A specified position for each vertex of each image projected from 11 to 14 onto the screen 10 is detected.
- the frame part 1, the projection area 2, and the marks 3b, 3d, 3e, 3f, and 3h have different reflectivities as described above. For example, white solid images are displayed when the system is started up, and images are taken with the cameras 21a to 21i. If the areas 22a to 22i are photographed, it can be determined.
- the central part of the mark 3e the central part of the boundary line between the frame part 1 and the marks 3b, 3d, 3f, 3h, and The corner part of the boundary line between the frame part 1 and the projection area 2 can be determined as the specified position of the apex of the projection image.
- the image processing circuit 42 detects the vertices of the images actually projected from the scanning projectors 11 to 14, and outputs image edge data indicating the positions of the vertices of the images to the multi-projector control unit 41.
- the apex of the projected image can be detected by, for example, performing known Laplacian filter processing on captured image data obtained by capturing with the cameras 21a to 21i.
- scanning by the scanning projectors 11 to 14 is performed so that both images adjacent in the vertical direction and the horizontal direction are not simultaneously shot during the shooting period of each camera 21a to 21i. It is desirable to set the direction and scanning timing to be different.
- the multi-projector control unit 41 supplies data indicating the specified position of each vertex of the projection image received from the image processing circuit 42 and image edge data to the projector control circuit 43 of the corresponding scanning projector.
- Each projector control circuit 43 of the scanning projectors 11 to 14 determines whether or not the vertex of the projection image is deviated from the corresponding specified position from the image edge data, and determines the scanning range by the horizontal scanning mirror 45 or the vertical scanning mirror 46. Determine whether adjustment is necessary. When adjustment is necessary, the position and size of the projection image are adjusted so that the position of the vertex of the projection image matches the specified position corresponding to the vertex. The position and size of the projected image can be adjusted by a drive signal supplied to the adjustment target scanning mirror.
- the horizontal scanning range of the projection image can be controlled by the voltage (amplitude value) of the drive signal supplied to the horizontal scanning mirror 45, and the vertical scanning range of the projection image is supplied to the vertical scanning mirror 46. It is possible to control with the voltage (amplitude value) of the driving signal to be transmitted.
- control unit 41 may execute the determination of whether or not the scanning range needs to be adjusted and the adjustment process of the scanning mirror drive signal.
- control unit such a configuration that performs the determination of the necessity of adjustment of the scanning range and the adjustment processing of the driving signal of the scanning mirror is referred to as a “control unit”.
- the multi-projector control unit 41 and the image processing circuit 42 included in the multi-projection display system of the present embodiment and the projector control circuit 43 included in each of the scanning projectors 11 to 14 include, for example, a CPU that executes processing according to a program, and predetermined arithmetic processing Can be realized by various logic operation circuits including a DSP, an A / D converter, a D / A converter, and a memory.
- FIG. 5 is a flowchart showing a processing procedure of the multi-projection display system of the present invention.
- each of the scanning projectors 11 to 14 performs white solid display.
- the cameras 21a to 21i shoot images in a shooting period including a scanning period within the shooting regions 22a to 22i in a display period of one frame of the image by each of the scanning projectors 11 to 14, and the captured image data is subjected to image processing. Transfer to the circuit 42 (step S1).
- the image processing circuit 42 detects the specified positions of the vertices of the projected images by the scanning projectors 11 to 14 as described above, and further scans the projectors 11 to 14.
- Each of the vertices of the image that is actually projected from the image data, and data indicating the specified position of each detected vertex (hereinafter referred to as specified position data) and image edge data indicating the position of the actual vertex of the projected image It outputs to the multi projector control part 41 (step S2).
- the multi-projector control unit 41 supplies the specified position data and image end data of each vertex of the projection image received from the image processing circuit 42 to the projector control circuit 43 of the corresponding scanning projector (step S3).
- the multi-projector control unit 43 of each of the scanning projectors 11 to 14 shifts the vertex of the projected image from the corresponding specified position based on the specified position data and image edge data of each vertex of the image received from the multi-projector control unit 41. (Step S4), and if it is shifted, the scanning range of the scanning projectors 11 to 14 is adjusted so that the vertex coincides with the specified position (step S5). On the other hand, when the vertex of the projected image is not deviated from the preset specified position, the process returns to step S1 and the processes of steps S1 to S5 are repeated.
- the projector control circuit 43 projects the image by modulating the intensity of the laser light to the modulator 44 based on the video signal supplied from the outside.
- the scanning speed of the projection light (laser light) in the marks 3b, 3d, 3e, 3f, and 3h having a higher reflectance (lower transmittance) than the projection area 2 is the difference in reflectance from the projection area 2. Considering this, the scanning speed of the projection light in the projection area 2 is made slower.
- the transmittance of a region with high transmittance is T1
- the transmittance of regions with low transmittance is T2
- the projection light of the region with high transmittance is T2.
- the maximum value of the scanning speed is v1
- the maximum value of the scanning speed of the projection light in the region where the transmittance is low is v2
- T1 / v1 ⁇ T2 / v2 (1) If the scanning speed is controlled so as to satisfy this relationship, an image can be displayed without lowering the luminance even in a region where the transmittance is low.
- the scanning speed of the light projected from the scanning projectors 11 to 14 onto the screen 10 is fast near the center in the projection range of the scanning projectors 11 to 14. It becomes late near the edge in the projection range. Therefore, the relationship of the above expression (1) can be substantially satisfied without performing special processing.
- the specified positions corresponding to the respective vertices of the projected image are determined at the time of starting the system, and each vertex of the projected image can be detected even when the image is displayed.
- the scanning range of the projected image by each of the scanning projectors 11 to 14 can be adjusted.
- the multi-projection display system of this embodiment it is possible to accurately recognize the specified position of each vertex of the image projected from each projector, and each projection so that each vertex matches the corresponding specified position.
- By adjusting the position and size of each image even when three or more projectors project an image on the screen 10 to form one screen, a projected image with little deterioration in display quality can be obtained.
- the frame portion 1, the projection region 2, and the marks 3b, 3d to 3f, and 3h are determined from the captured image data obtained by capturing the images with the cameras 21a to 21i, and the scanning projectors 11 to 11 are determined.
- the specified positions of the vertices of each image projected from 14 to the screen 10 are detected.
- the cameras 21a to 21i only need to be able to photograph the range in which the projection area 2, the frame portion 1, and the marks 3b, 3d to 3f, and 3h can be distinguished, and the photographing center may be shifted from the corresponding specified position.
- FIG. 6 is a block diagram illustrating a configuration example of the multi-projection display system according to the second embodiment.
- FIG. 7 is a schematic diagram illustrating an example of a screen included in the multi-projection display system according to the second embodiment.
- the multi-projection display system according to the second embodiment is similar to the multi-projection display according to the first embodiment, for example, by projecting images from the four scanning projectors 11 to 14 onto the screen 10 for rear projection. It is the structure which forms a screen.
- the multi-projection display system of the second embodiment is projected on the back side of the screen 10 by the scanning projectors 11 to 14 as in the multi-projection display of the first embodiment.
- cameras 21a to 21i are provided for shooting the shooting areas 22a to 22i including the vertices of the respective images, and the cameras 21a to 21u are used for shooting the shooting areas 22j to 22u including the center of the edge of each image. Is a configuration in which is installed. The other configuration is the same as that of the multi-projection display system according to the first embodiment shown in FIG.
- FIG. 7 only the screen 10 and the photographing regions 22a to 22u arranged on the screen 10 are shown, and the scanning projectors 11 to 14 and the cameras 21a to 21u are not shown.
- the image processing circuit 42 of the present embodiment outputs vertex data indicating the vertex of each projection image to the multi-projector control unit 2 based on the captured image data near the vertex of each projection image captured by the cameras 21a to 21i. Based on the photographed image data in the vicinity of the center photographed by the cameras 21j to 21u, image edge data indicating the edge of each projection image is output to the multi-projector controller 2.
- the multi-projector control unit 41 supplies the image edge data received from the image processing circuit 42 to the projector control circuit 43 of the corresponding scanning projector 11-14.
- the projector control circuit 43 detects distortion of the projected image based on the received image edge data, and performs distortion correction processing for correcting the distortion on the video signal.
- correction is performed so that the projected image approaches a rectangle, that is, the end of the projected image is horizontal or vertical. More specifically, when the edge swells outward with respect to the straight line connecting the vertex positions, the amplitude of the scanning mirror is gradually reduced toward the vicinity of the center of the edge and contracted inward. If so, the distortion is corrected by gradually increasing the amplitude of the scanning mirror toward the vicinity of the center of the edge.
- a known correction method corresponding to the type of distortion may be used for the distortion correction process, and the present embodiment does not limit the correction method.
- the projector control circuit 43 generates a modulation signal based on the video signal after distortion correction, and supplies the modulation signal to the modulator 44. Further, when the vertices of the projected image after distortion correction are deviated from the corresponding specified positions, the driving signals supplied to the horizontal scanning mirror 45 and the vertical scanning mirror 46 are adjusted, and the corresponding vertices of the projected image are adjusted. Match the position. Other configurations and processes are the same as those in the first embodiment described above, and thus description thereof is omitted.
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Abstract
Description
前記スクリーン上における投射画像の頂点が位置すべき規定位置を特定するための、少なくとも前記スクリーンの投射領域よりも可視光に対する反射率が高いマーク、または可視光に対する反射率が前記投射領域と異なる前記投射領域を支持する支持部材を含む撮影領域を撮影できる位置にそれぞれ設置された複数のカメラと、
前記カメラで前記撮影領域を撮影することで得られる撮影画像データを基に、前記規定位置及び前記投射画像の各頂点の位置を検出し、検出した前記規定位置を示すデータ及び前記投射画像の各頂点の位置を示す画像端データを出力する画像処理回路と、
前記規定位置を示すデータ及び前記画像端データに基づき、前記投射画像の頂点の位置が該頂点に対応する規定位置からずれているとき、それらが一致するように前記投射画像の位置及び大きさを調整する制御部と、
を有する。
複数のカメラが、
前記スクリーン上における投射画像の頂点が位置すべき規定位置を特定するための、少なくとも前記スクリーンの投射領域よりも可視光に対する反射率が高いマーク、または可視光に対する反射率が前記投射領域と異なる前記投射領域を支持する支持部材を含む撮影領域を撮影し、
制御部が、
前記カメラで前記撮影領域を撮影することで得られる撮影画像データを基に、前記規定位置及び前記投射画像の各頂点の位置を検出し、検出した前記規定位置を示すデータ及び前記投射画像の各頂点の位置を示す画像端データを生成し、
前記規定位置を示すデータ及び前記画像端データに基づき、前記投射画像の頂点の位置が該頂点に対応する規定位置からずれているとき、それらが一致するように前記投射画像の位置及び大きさを調整する方法である。
(第1の実施の形態)
図1は第1の実施の形態のマルチプロジェクションディスプレイシステムの全体像を示す模式図である。図2は図1に示したスクリーンの中央部に設けられた撮影領域を拡大した様子を示す平面図であり、図3は図1に示したスクリーンの中央上端部に設けられた撮影領域を拡大した様子を示す平面図である。
T1/v1≦T2/v2・・・(1)
の関係を満たすように走査速度を制御すれば、透過率が低い領域であっても輝度が低下することなく画像を表示できる。
(第2の実施の形態)
走査型プロジェクタからスクリーンに投射される画像では、画像端辺の中央部が画像中心から膨らむ歪(樽型歪)や画像端辺の中央部が画像中心へ向かって収縮する歪(糸巻き型歪)が発生することがある。そのような場合、投射画像の各頂点が対応する規定位置とそれぞれ一致していても画像端辺の中央部付近で位置ずれが発生してしまう。
Claims (12)
- 3台以上のプロジェクタからスクリーンに四角形状の画像を投射し、投射された複数の投射画像をスクリーン上でつなぎ合わせることで一つの画面を形成するマルチプロジェクションディスプレイシステムであって、
前記スクリーン上における投射画像の頂点が位置すべき規定位置を特定するための、少なくとも前記スクリーンの投射領域よりも可視光に対する反射率が高いマーク、または可視光に対する反射率が前記投射領域と異なる前記投射領域を支持する支持部材を含む撮影領域を撮影できる位置にそれぞれ設置された複数のカメラと、
前記カメラで前記撮影領域を撮影することで得られる撮影画像データを基に、前記規定位置及び前記投射画像の各頂点の位置を検出し、検出した前記規定位置を示すデータ及び前記投射画像の各頂点の位置を示す画像端データを出力する画像処理回路と、
前記規定位置を示すデータ及び前記画像端データに基づき、前記投射画像の頂点の位置が該頂点に対応する規定位置からずれているとき、それらが一致するように前記投射画像の位置及び大きさを調整する制御部と、
を有するマルチプロジェクションディスプレイシステム。 - 前記プロジェクタは、
二次元走査型プロジェクタである請求項1記載のマルチプロジェクションディスプレイシステム。 - 前記制御部は、
前記投射領域における投射光の走査速度よりも前記マーク上における投射光の走査速度を遅くする請求項1または2記載のマルチプロジェクションディスプレイシステム。 - 前記制御部は、
前記投射領域の透過率をT1、前記マークの透過率をT2、前記投射領域における投射光の走査速度の最大値をv1、前記前記マーク上における投射光の走査速度の最大値をv2としたとき、
T1/v1≦T2/v2
の関係を満たすように前記投射光の走査速度を制御する請求項3記載のマルチプロジェクションディスプレイシステム。 - 前記スクリーン上における投射画像の端辺中央部が位置すべき規定位置を特定するための、少なくとも前記スクリーンの投射領域よりも可視光に対する反射率が高いマーク、または可視光に対する反射率が前記投射領域と異なる前記投射領域を支持する支持部材を含む撮影領域を撮影できる位置にそれぞれ設置された複数のカメラをさらに有し、
前記制御部は、
前記カメラが前記投射画像の端辺中央部を含む撮影領域を撮影することで得られる撮影画像データから前記投射画像の歪を検出し、該検出した歪を補正する請求項1から4のいずれか1項記載のマルチプロジェクションディスプレイシステム。 - 前記マークは、
前記スクリーン表面に施す低反射処理により反射率を所望の値に設定することで形成される請求項1から5のいずれか1項記載のマルチプロジェクションディスプレイシステム。 - 3台以上のプロジェクタからスクリーンに四角形状の画像を投射し、投射された複数の投射画像をスクリーン上でつなぎ合わせることで一つの画面を形成するマルチプロジェクションディスプレイシステムの画面形成方法であって、
複数のカメラが、
前記スクリーン上における投射画像の頂点が位置すべき規定位置を特定するための、少なくとも前記スクリーンの投射領域よりも可視光に対する反射率が高いマーク、または可視光に対する反射率が前記投射領域と異なる前記投射領域を支持する支持部材を含む撮影領域を撮影し、
制御部が、
前記カメラで前記撮影領域を撮影することで得られる撮影画像データを基に、前記規定位置及び前記投射画像の各頂点の位置を検出し、検出した前記規定位置を示すデータ及び前記投射画像の各頂点の位置を示す画像端データを生成し、
前記規定位置を示すデータ及び前記画像端データに基づき、前記投射画像の頂点の位置が該頂点に対応する規定位置からずれているとき、それらが一致するように前記投射画像の位置及び大きさを調整する画面形成方法。 - 前記プロジェクタが、
二次元走査型プロジェクタである請求項7記載の画面形成方法。 - 前記制御部が、
前記投射領域における投射光の走査速度よりも前記マーク上における投射光の走査速度を遅くする請求項7または8記載の画面形成方法。 - 前記制御部が、
前記投射領域の透過率をT1、前記マークの透過率をT2、前記投射領域における投射光の走査速度の最大値をv1、前記前記マーク上における投射光の走査速度の最大値をv2としたとき、
T1/v1≦T2/v2
の関係を満たすように前記投射光の走査速度を制御する請求項8記載の画面形成方法。 - 複数のカメラが、
前記スクリーン上における投射画像の端辺中央部が位置すべき規定位置を特定するための、少なくとも前記スクリーンの投射領域よりも可視光に対する反射率が高いマーク、または可視光に対する反射率が前記投射領域と異なる前記投射領域を支持する支持部材を含む撮影領域を撮影し、
前記制御部が、
前記カメラが前記投射画像の端辺中央部を含む撮影領域を撮影することで得られる撮影画像データから前記投射画像の歪を検出し、該検出した歪を補正する請求項7から10のいずれか1項記載の画面形成方法。 - 前記マークが、
前記スクリーン表面に施す低反射処理により反射率を所望の値に設定することで形成される請求項7から11のいずれか1項記載の画面形成方法。
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