Display system and information processing method

Abstract

The present technology relates to a display system and an information processing method that make it possible to suppress an uneven appearance of a video due to viewing angle characteristics of an LED. A display system according to the present technology comprises: a division display unit that constitutes one display unit by being arranged in a tile shape; an acquisition unit that acquires viewing position information indicating a viewing position of a display video displayed on the display unit; and a luminance control unit that controls the luminance of the division display unit on the basis of the viewing position information. The present technology can be applied to, for example, an imaging system used in virtual production.

Description

Display system and information processing method

[0001] The present technology relates to a display system and an information processing method, and more particularly to a display system and an information processing method that can suppress unevenness in the appearance of an image due to the viewing angle characteristics of an LED.

[0002] In recent years, the market for large, direct-view, tiling-type displays using LEDs (Light Emitting Diodes) has been expanding. For example, virtual production, in which a background such as a landscape is reproduced on a large LED display at a content production site and then the background and subject are photographed with a camera, is growing rapidly.

[0003] Patent document 1 describes a display system that adjusts brightness to avoid color shifts on large LED displays, and adjusts brightness to display an image with uniformity across the entire large LED display.

[0004] International Publication No. 2023 / 203985

[0005] However, in LED displays, the viewing angle characteristics of each RGB LED are different, so depending on the viewing angle of the LED display, the brightness and color of some areas of the image displayed on the LED display may appear different from other areas.

[0006] This technology was developed in light of these circumstances, and makes it possible to prevent unevenness in the appearance of images due to the viewing angle characteristics of LEDs.

[0007] A display system according to a first aspect of the present technology includes a split display unit that is arranged in a tiled pattern to form a single display unit, an acquisition unit that acquires viewing position information that indicates the viewing position of a display image that is displayed on the display unit, and a brightness control unit that controls the brightness of the split display unit based on the viewing position information.

[0008] An information processing method according to a second aspect of the present technology includes a display system having a split display unit that is arranged in a tiled pattern to form a single display unit, acquiring viewing position information indicating the viewing position of a display image displayed on the display unit, and controlling the brightness of the split display unit based on the viewing position information.

[0009] In the first and second aspects of the present technology, a display system including a split display unit that is arranged in a tiled pattern to form a single display unit acquires viewing position information indicating the viewing position of a display image displayed on the display unit, and controls the brightness of the split display unit based on the viewing position information.

[0010] 1 is a diagram illustrating an overview of an imaging system to which the present technology is applied. FIG. 1 is a diagram illustrating an example of an image captured by a camera. FIG. 2 is a diagram illustrating an example of the configuration of an imaging system. FIG. 3 is a diagram illustrating an example of viewing angle characteristics of an LED of a display. FIG. 4 is a first diagram illustrating a color shift caused by the viewing angle characteristics of an LED. FIG. 5 is a second diagram illustrating a color shift caused by the viewing angle characteristics of an LED. FIG. 6 is a first diagram illustrating correction of a divided image performed by a display cabinet. FIG. 7 is a diagram illustrating a case where a camera is moved. FIG. 8 is a third diagram illustrating a color shift caused by the viewing angle characteristics of an LED. FIG. 9 is a fourth diagram illustrating a color shift caused by the viewing angle characteristics of an LED. FIG. 10 is a second diagram illustrating correction of a divided image performed by a display cabinet. FIG. 11 is a block diagram illustrating an example of the configuration of an imaging system. FIG. 12 is a diagram illustrating panel position information, viewing position information, and viewing angle. FIG. 13 is a diagram illustrating an example of an LUT. FIG. 14 is a flowchart illustrating processing performed by an imaging system 1.

[0011] Hereinafter, an embodiment of the present technology will be described. The description will be made in the following order: 1. Overview of the imaging system 2. Configuration and operation of the imaging system

[0012] 1. Overview of Imaging System FIG. 1 is a diagram illustrating an overview of an imaging system 1 to which the present technology is applied.

[0013] 1 is a system used for shooting, for example, virtual production (in-camera VFX). For example, movies or dramas are shot using the shooting system 1. The shooting system 1 is made up of a camera 11, a video storage device (not shown) that stores the video images shot by the camera 11, a wall-mounted display 12, and a display controller (not shown) that controls the display 12.

[0014] The display 12 is, for example, an LED display, and is placed in a real space such as a studio. The display 12 displays, as a display image, for example, an image of a three-dimensional space created using CG (Computer Graphics). The photographer P1 uses the camera 11 to photograph the subject, the motorcycle M1, with the CG image displayed on the display 12 as the background.

[0015] FIG. 2 is a diagram showing an example of a video image captured by the camera 11. As shown in FIG.

[0016] 2, the image captured by the camera 11 makes the motorcycle M1 appear as if it were present in a three-dimensional space represented by a CG image. In this way, by using the photography system 1, the photographer P1 can capture in a studio an image in which the space depicted in the CG image appears to be expanding in the background of the motorcycle M1.

[0017] FIG. 3 is a diagram showing an example of the configuration of the imaging system 1.

[0018] As shown in FIG. 3, the photographing system 1 (display system) is made up of a camera 11 and a display 12 as well as a video server 61 , a PC (personal computer) 62 , and a display controller 63 .

[0019] In response to an instruction from the photographer P1 to start shooting, the camera 11 shoots a subject with the image displayed on the display 12 as the background.

[0020] The display 12 (display unit) is a large LED display configured by tile-arrangement of n (n is a positive integer) display cabinets (display units) 41-1 to 41-n. In the example of Figure 3, the display 12 is configured by 6 x 24 display cabinets. In the following, when there is no need to distinguish between the display cabinets 41-1 to 41-n, they will simply be referred to as display cabinets 41.

[0021] The display cabinet 41 is configured by m (m is a positive integer) LED arrays 51-1 to 51-m arranged in a tiled pattern, with LEDs (not shown) corresponding to each pixel arranged in a matrix (two-dimensional array). In the example of FIG. 3, the display cabinet 41 is configured by 4 x 3 LED arrays. Note that, hereinafter, when there is no need to distinguish between the LED arrays 51-1 to 51-m, they will simply be referred to as LED arrays 51. The group of LED arrays 51 that make up one display cabinet 41 are arranged in a tiled pattern to function as a divided display section that makes up one display 12.

[0022] Each display cabinet 41 of the display 12 is connected to the display controller 63 via a cable such as a LAN (Local Area Network) cable. Based on the video data supplied from the display controller 63, the display 12 displays the display image indicated by the video data. Note that the video data supplied to each display cabinet 41 is video data of divided images obtained by dividing the display image so as to correspond to the position on the display 12 of that display cabinet 41. Each display cabinet 41 displays the divided image indicated by the video data, thereby displaying the entire display image on the display 12.

[0023] The display cabinets 41 of the display 12 may be daisy-chained. In this case, the display cabinets 41 are connected to each other by a cable such as a LAN cable. When video data is supplied from the display controller 63 to the display chain of the daisy-chained display cabinets 41, each display cabinet 41 displays an image based on the video data corresponding to itself among the supplied video data. Note that a daisy-chain connection is also called a cascade connection.

[0024] Of the display cabinets 41 connected in a daisy chain, the (first) display cabinet 41 directly connected to the display controller 63 receives video data supplied from the display controller 63 and supplies the video data to subsequent display cabinets 41 connected in the daisy chain. The subsequent display cabinets 41 connected in the daisy chain acquire video data from the previous display cabinet 41 and supply the video data to further subsequent display cabinets 41 connected in the daisy chain.

[0025] The video server 61 is configured by, for example, a server computer. The video server 61 stores video data such as video content and generates video data by rendering a three-dimensional space created by CG. The video server 61 supplies the video data to a display controller 63.

[0026] Instead of the video server 61, video data may be provided to the display controller 63 from a recording medium such as an HDD (Hard Disk Drive) or a BD (Blu-ray Disc) (registered trademark).

[0027] The PC 62 is a general-purpose computer that generates control commands for controlling the display controller 63 and transmits the control commands to the display controller 63, thereby controlling the display controller 63.

[0028] The display controller 63 divides the video data supplied from the video server 61 into n pieces according to the positions of the display cabinets 41 and transmits them to each display cabinet 41. The display controller 63 also transmits information based on control commands supplied from the PC 62 to each display cabinet 41.

[0029] The display cabinets 41 may be daisy-chained to the display controller 63. The display controller 63 transmits information based on video data supplied from the video server 61 and control commands supplied from the PC 62 to the first display cabinet 41 in the display chain that includes the corresponding display cabinet 41. Furthermore, multiple display chains may be connected to the display controller 63.

[0030] The display controller 63 and the display 12 may be integrated into one unit, or may form a single display device. The PC 62, the display controller 63, and the display 12 may be integrated into one unit, or may form a single display device.

[0031] Fig. 4 is a diagram showing an example of the viewing angle characteristics of the LEDs of the display 12. In Fig. 4, the horizontal axis represents the angle (viewing angle) of the camera 11 relative to each LED (each pixel) of the display 12, and the vertical axis represents the brightness of each LED as seen from the camera 11.

[0032] In the example of FIG. 4, the viewing angle characteristics of a red LED are shown by a solid line, the viewing angle characteristics of a blue LED are shown by a dashed line, and the viewing angle characteristics of a green LED are shown by a broken line.

[0033] As shown in Figure 4, the viewing angle characteristics of each RGB LED on display 12 are different, so depending on the viewing angle of camera 11 relative to display 12, the brightness and color of some areas of the displayed image may appear different from those of other areas.

[0034] For example, as shown in A of Fig. 5, when camera 11 faces the center of display 12, the viewing angle of camera 11 with respect to the pixel at the center of display 12 is 0 degrees. The viewing angle of camera 11 with respect to the pixel on the left edge as viewed from camera 11 is -60 degrees, and the viewing angle of camera 11 with respect to the pixel on the right edge is 60 degrees.

[0035] In this case, since the viewing angle characteristics of the RGB LEDs are different, the color of the center and the color of the periphery of the display 12 appear different when viewed from the camera 11, as shown in FIG. 5B.

[0036] Furthermore, for example, as shown in FIG. 6, when a semi-cylindrical display 12A is installed in a studio and a display 12B is installed on the ceiling of the studio, the viewing angle of the camera 11 relative to each pixel of the display 12B is particularly large, resulting in significant color shift on the display 12B.

[0037] Therefore, in the imaging system 1 of the present technology, each display cabinet 41 controls the brightness of the LED array 51 based on the viewing angle characteristics of the LED, thereby making it possible to align the color, brightness, and the like of the entire displayed image when viewed from the camera 11. The brightness of the LED array 51 is controlled by, for example, performing correction on the divided images based on the viewing angle characteristics of the LEDs.

[0038] FIG. 7 is a diagram illustrating the correction of the divided images performed by the display cabinet 41. In FIG.

[0039] As shown in the upper left part of Figure 7, in the photography system 1, the angle at which light incident on the camera 11 is emitted from the LEDs at each corner (four corners) of the display cabinet 41 (viewing angle) is calculated in real time based on viewing position information that indicates the viewing position of the camera 11.

[0040] Furthermore, as shown in the upper right part of Figure 7, the imaging system 1 pre-stores viewing angle data D1R indicating the correspondence between the viewing angle of the camera 11 for a red LED and the correction value, viewing angle data D1G indicating the correspondence between the viewing angle of the camera 11 for a green LED and the correction value, and viewing angle data D1B indicating the correspondence between the viewing angle of the camera 11 for a blue LED and the correction value.

[0041] The display cabinet 41 calculates the gain for each pixel of the display cabinet 41 as a correction value, as shown in the middle of Figure 7, based on viewing angle information indicating the viewing angle of the camera 11 for the pixel of each corner and the viewing angle data D1R, D1G, and D1B.

[0042] Specifically, the display cabinet 41 first calculates a gain for each corner pixel (pixels Pi1, Pi2, Pi3, Pi4) based on the viewing angle information and viewing angle data D1R, D1G, and D1B for each corner, using the reference gain. Next, the display cabinet 41 calculates a gain for pixels other than the corner pixels of the display cabinet 41 based on the reference gain. The display cabinet 41 calculates the gain for pixels other than the corner pixels of the display cabinet 41, for example, by performing linear interpolation using the reference gain. The linear interpolation allows a gain whose value changes smoothly between pixels to be obtained.

[0043] It should be noted that a uniform gain value may be calculated for all pixels of the display cabinet 41 .

[0044] The display cabinet 41 performs gain correction on the divided images by multiplying the R channel, G channel, and B channel pixel values ​​of each pixel of the displayed image by the calculated gain for each pixel of the display cabinet 41. By displaying the corrected divided images on the display cabinet 41, the camera 11 can capture displayed images with consistent overall brightness, color, and other aspects, as shown in the lower part of Fig. 7 .

[0045] FIG. 8 is a diagram for explaining the case where the camera 11 is moved.

[0046] As shown in A of Figure 8, when the camera 11 is moved from right to left toward the display 12 during the period from time t1 to time t2, the viewing angle of the camera 11 relative to the pixels at each corner of the display cabinet 41 is calculated at each of time t1 and time t2.

[0047] At time t1, correction is made to the split images according to the viewing angle of camera 11 at time t1, and at time t2, correction is made to the split images according to the viewing angle of camera 11 at time t2, so that correction is made to the split images in accordance with the movement of camera 11. As a result, as shown in B of Fig. 8, even if camera 11 is moved during the period from time t1 to time t2, camera 11 can continue to capture display images with consistent overall brightness, color, and other aspects.

[0048] When shooting using virtual production with two cameras 11, it is also possible to input viewing angle information indicating the viewing angles of each of the two cameras 11 into the display cabinet 41. In this case, a split image corrected according to the viewing angle of one camera 11 and a split image corrected according to the viewing angle of the other camera 11 are displayed alternately for each frame, allowing both cameras 11 to shoot display images that have consistent overall brightness, color, and other aspects.

[0049] The display system of this technology can be applied not only to display devices used in virtual production, but also to display devices that viewers actually view. Even in the display 12 that viewers actually view, the viewing angle characteristics of each RGB LED are different, so the brightness and color of some areas of the displayed image may appear different from other areas depending on the viewer's viewing angle relative to the display 12.

[0050] For example, as shown in A of Fig. 9, when viewer P11 faces the center of the display 12, the viewing angle of viewer P11 to the pixel at the center of the display 12 is 0 degrees. The viewing angle of viewer P11 to the pixel on the left edge as seen from viewer P11 is -60 degrees, and the viewing angle of viewer P11 to the pixel on the right edge is 60 degrees.

[0051] In this case, since the viewing angle characteristics of the RGB LEDs are different, the colors in the center and periphery of the display 12 appear different to the viewer P11, as shown in FIG. 9B.

[0052] Also, for example, as shown in FIG. 10, if the display 12 is installed at a position higher than the eye level of the viewer P11, the viewing angle of the viewer P11 with respect to each pixel of the display 12 is large, and therefore, large color shift occurs on the display 12.

[0053] As described above, in the display 12 of the present technology, each display cabinet 41 controls the brightness of the LED array 51 based on the viewing angle characteristics of the LEDs, thereby making it possible to make the brightness and color of the entire displayed image uniform when viewed by the viewer P11. The brightness of the LED array 51 is controlled by, for example, performing correction on the divided image based on the viewing angle characteristics of the LEDs.

[0054] 11 and 12 are diagrams illustrating the correction of the divided images performed by the display cabinet 41. FIG.

[0055] The viewing position of viewer P11 is determined in advance, and viewing position information of viewer P11 is input in the imaging system 1. Next, as shown in the upper left parts of Figures 11 and 12, the angle at which light entering the eyes of viewer P11 is emitted from the LEDs at each corner (four corners) of the display cabinet 41 (viewing angle) is calculated based on the viewing position information of viewer P11.

[0056] As shown in the upper right part of Figure 12, the imaging system 1 pre-stores viewing angle data D11R indicating the correspondence between the viewing angle of viewer P11 for a red LED and the correction value, viewing angle data D11G indicating the correspondence between the viewing angle of viewer P11 for a green LED and the correction value, and viewing angle data D11B indicating the correspondence between the viewing angle of viewer P11 for a blue LED and the correction value.

[0057] The display cabinet 41 calculates the gain for each pixel of the display cabinet 41 as a correction value based on the viewing angle information indicating the viewing angle of the viewer P11 for the pixel of each corner and the viewing angle data D11R, D11G, and D11B, as shown in the middle part of Figure 12.

[0058] Specifically, the display cabinet 41 first calculates the gain for each corner pixel (pixels Pi1, Pi2, Pi3, and Pi4) as a reference gain based on the viewing angle information for each corner and the viewing angle data D11R, D11G, and D11B. Next, the display cabinet 41 calculates the gain for pixels other than the corner pixels of the display cabinet 41, for example, by performing linear interpolation using the reference gain. The linear interpolation allows for a gain whose value changes smoothly between pixels to be obtained.

[0059] It should be noted that a uniform gain value may be calculated for all pixels of the display cabinet 41 .

[0060] The display cabinet 41 performs gain correction on the split images by multiplying the calculated gain for each pixel of the display cabinet 41 by the pixel values ​​of the R channel, G channel, and B channel of each pixel of the displayed image. By displaying the corrected split images on the display cabinet 41, the viewer P11 can capture split images with consistent overall brightness, color, and other aspects, as shown in the lower left part of Figure 12.

[0061] As shown in the lower right part of Figure 12, if viewer P11 moves during the period from time t11 to time t12, some color shift will occur if the distance between display 12 and viewer P11 does not change, but the brightness, color, and other aspects of the overall displayed image will remain uniform.

[0062] 2. Configuration and Operation of the Photography System FIG. 13 is a block diagram showing an example of the configuration of the photography system 1. As shown in FIG.

[0063] As shown in FIG. 13, the photography system 1 is made up of a plurality of display cabinets 41 , a video server 61 , a PC 62 , a display controller 63 , and a tracker 64 .

[0064] The video server 61 transmits the video data to the display controller 63 .

[0065] A producer of a movie or drama operates an input unit (not shown) of the PC 62 to input installation information, which is information relating to the installation position of the display 12, to the PC 62. Based on the installation information, the PC 62 calculates the position of each corner of all display cabinets 41 that make up the display 12, and transmits panel position information indicating the position of each corner of the display cabinet 41 to the display controller 63.

[0066] The display controller 63 divides the video data transmitted from the video server 61 into n pieces according to the position of the display cabinet 41 and transmits them to each display cabinet 41. The display controller 63 also transmits, to each display cabinet 41, panel position information indicating the position of each corner of the destination display cabinet 41, out of the panel position information transmitted from the PC 62. Furthermore, the display controller 63 transmits, to each display cabinet 41, the viewing position information of the camera 11 transmitted (input) from the tracker 64.

[0067] When display cabinets 41 are daisy-chained to the display controller 63, the display controller 63 supplies the video data, panel position information, and viewing position information to the display cabinet 41 at the head of the display chain including the corresponding display cabinet 41.

[0068] The tracker 64 acquires viewing position information of the camera 11. For example, the tracker 64 is placed on the camera 11 and acquires the viewing position information of the camera 11 by tracking using a marker provided in the studio. The tracker 64 transmits the viewing position information of the camera 11 to the display controller 63.

[0069] Note that if a camera tracking system including the tracker 64 is not provided, for example, a producer or cameraman of a movie or drama operates the PC 62 to input the viewing position of the camera 11, and the PC 62 transmits viewing position information based on the operation content to the display controller 63. If the display system of the present technology is applied to a display device that a viewer actually watches, for example, the viewer operates a controller connected to the PC 62 to input the viewer's own viewing position, and the PC 62 transmits viewing position information based on the operation content to the display controller. It is also possible for an installer or the like who installs the display 12 to input a position where the viewer is expected to frequently watch the displayed video into the PC 62 as the viewer's viewing position.

[0070] The display cabinet 41 is composed of a control unit 101, a register 102, an LED driver 103, and an LED 104. In the display cabinet 41, a LUT (Look-Up Table) that receives the viewing angles of the camera 11 and the viewer as input and outputs a gain used for gain correction is held as viewing angle data.

[0071] The control unit 101 is configured with a CPU and the like. A predetermined program is executed by the CPU and the like to realize a viewing angle calculation unit 121, a calculation unit 122, and a correction unit 123. The control unit 101 functions as a brightness control unit that controls the brightness of the divided display units. The display 12, which is configured with multiple display cabinets 41, can also be said to be a display device that includes multiple divided display units (groups of LED arrays 51) and multiple brightness control units corresponding to each of the multiple divided display units.

[0072] The viewing angle calculation unit 121 functions as an acquisition unit that receives and acquires the viewing position information and panel position information transmitted from the display controller 63. Based on the viewing position information and panel position information, the viewing angle calculation unit 121 calculates the viewing angle for a predetermined pixel of the display cabinet 41 itself. For example, the viewing angle of the camera 11 for each corner pixel among the pixels that make up the display cabinet 41 is calculated.

[0073] When the display cabinets 41 are connected in a daisy chain, the viewing angle calculation unit 121 of each display cabinet 41 other than the first in the display chain acquires the video data, panel position information, and viewing position information from the previous display cabinet, and a supply unit (not shown) of each display cabinet 41 supplies the video data, panel position information, and viewing position information to the subsequent display cabinet.

[0074] 14 is a diagram illustrating panel position information, viewing position information, and viewing angle. In the example of FIG. 14, the display 12 is configured with 4×4 display cabinets 41, and the display image is viewed by a viewer P21.

[0075] In the panel position information and viewing position information, the positions of pixels at each corner of display cabinet 41 and the viewing position of viewer P21 are indicated by coordinates on a three-dimensional coordinate system with the center point Po1 of the bottom of display 12 as the origin. For example, the position of pixel Pi11 in the upper left corner of display cabinet 41-1-1 in the first row and first tier is indicated by coordinates (Xp, Yp, Zp), and the viewing position of viewer P21 is indicated by coordinates (Xc, Yc, Zc). The x-axis indicates the horizontal direction as seen from viewer P21, the y-axis indicates the depth direction, and the z-axis indicates the height direction.

[0076] Panel position information indicating the position of pixel Pi11 in the upper left corner, pixel Pi12 in the upper right corner, pixel Pi13 in the lower left corner, and pixel Pi14 in the lower right corner is input to the display cabinet 41-1-1. The display cabinet 41-1 calculates the viewing angle of viewer P21 for each of pixels Pi11 to Pi14.

[0077] The viewing angle is expressed by a vertical viewing angle (zenith angle) θ and a horizontal viewing angle (azimuth angle) φ. For example, the vertical viewing angle θ for pixel Pi11 in the upper left corner of display cabinet 41-1-1 in the first row and first tier (the pixel that viewer P21 looks up at) is indicated as a negative value, and the vertical viewing angle θ for pixel Pi31 in the lower left corner of display cabinet 41-1-4 in the first row and fourth tier (the pixel that viewer P21 looks down at) is indicated as a positive value. Furthermore, for example, the horizontal viewing angle φ for pixel Pi11 in the upper left corner of display cabinet 41-1-1 in the first row and first tier (the pixel on the left side as seen by viewer P21) is indicated as a positive value, and the horizontal viewing angle φ for pixel Pi21 in the upper right corner of display cabinet 41-4-1 in the first row and fourth tier (the pixel on the right side as seen by viewer P21) is indicated as a negative value.

[0078] 13 , the viewing angle calculation unit 121 obtains a gain for each corner pixel based on the viewing angle for the pixel at each corner. Specifically, the viewing angle calculation unit 121 refers to the stored LUT and converts the viewing angle for the pixel at each corner into a gain for the pixel at each corner.

[0079] FIG. 15 is a diagram illustrating an example of an LUT.

[0080] The LUT for the red LED (R channel) is shown in the upper row of Figure 15, the LUT for the green LED (G channel) is shown in the middle row, and the LUT for the blue LED (B channel) is shown in the lower row. Each LUT is registered with a combination of horizontal viewing angles (-60°, -40°, -20°, 0°, 20°, 40°, 60°) and vertical viewing angles (-60°, -40°, -20°, 0°, 20°, 40°, 60°) associated with a gain.

[0081] The viewing angle calculation unit 121 supplies the gain for the pixel at each corner to the register 102 .

[0082] The calculation unit 122 obtains the gain for each corner pixel from the register 102 and calculates the gain for pixels other than the corner pixels by, for example, performing linear interpolation. The calculation unit 122 supplies the gains for all pixels to the correction unit 123.

[0083] The correction unit 123 performs gain correction on the video data by multiplying the pixel values ​​of the R channel, G channel, and B channel of each pixel of the video data transmitted from the display controller 63 by the gain for each pixel supplied from the calculation unit 122. The correction unit 123 generates light emission data indicating the light emission intensity of the LED 104 based on the corrected video data and supplies the data to the LED driver 103.

[0084] The register 102 stores the gain for the pixel at each corner supplied from the viewing angle calculation unit 121 .

[0085] The LED driver 103 controls the LED 104 based on the light emission data supplied from the correction unit 123 to cause the LED 104 to emit light.

[0086] The LEDs 104 are arranged in each of the plurality of LED arrays 51 that make up the display cabinet 41 .

[0087] Next, the processing performed by the photographing system 1 having the above configuration will be described with reference to the flowchart of FIG.

[0088] In step S1, the PC 62 calculates the position of the pixels at each corner of the display cabinet 41, and the display controller 63 transmits panel position information indicating the position of each corner of the destination display cabinet 41 to each display cabinet 41. Note that the processing of step S1 needs to be performed only once before the display 12 starts displaying the display image.

[0089] In step S2, the display controller 63 acquires viewing position information from the tracker 64 or the like.

[0090] In step S3, the display controller 63 transmits the viewing position information to each display cabinet 41.

[0091] In step S4, the viewing angle calculation unit 121 of the display cabinet 41 acquires the gain for the pixel at each corner. Specifically, the viewing angle calculation unit 121 calculates the viewing angle for the pixel at each corner of the display cabinet 41 itself, based on the viewing position information and panel position information transmitted from the display controller 63. The viewing angle calculation unit 121 refers to the LUT held in the display cabinet 41 and converts the viewing angle for the pixel at each corner into a gain for the pixel at each corner.

[0092] In step S5, the calculation unit 122 calculates the gains for all pixels based on the gains for the pixels at each corner.

[0093] In step S6, the correction unit 123 performs gain correction on the video data using the gains of all pixels calculated by the calculation unit 122.

[0094] In step S7, the corrected divided image is displayed on the display cabinet 41. When the divided image is displayed on all the display cabinets 41, the entire display image is displayed on the display 12.

[0095] As described above, in the imaging system 1 of the present technology, viewing position information indicating the viewing position of the displayed image is acquired by the viewing angle calculation unit 121, and the brightness of the divided display unit (the group of LED arrays 51 that make up the display cabinet 41) that is arranged in a tiled pattern to form a single display unit is controlled by the control unit 101 based on the viewing position information.

[0096] This makes it possible to prevent uneven image appearance due to the viewing angle characteristics of the LED, such as the brightness and color of some areas of the image displayed on the display 12 appearing differently from other areas.

[0097] The above-described series of processes can be executed by hardware or software. When the series of processes is executed by software, the program constituting the software is installed in a computer incorporated in dedicated hardware or a general-purpose personal computer.

[0098] The program to be installed is provided by being recorded on removable media such as an optical disk (CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), etc.) or semiconductor memory. It may also be provided via wired or wireless transmission media such as a local area network, the Internet, or digital broadcasting. The program can be pre-installed in a ROM or memory unit.

[0099] The program executed by the computer may be a program that processes in chronological order according to the order described in this specification, or may be a program that processes in parallel or at the required timing, such as when called.

[0100] In this specification, a system refers to a collection of multiple components (devices, modules (components), etc.), regardless of whether all of the components are housed in the same housing. Therefore, multiple devices housed in separate housings and connected via a network, and a single device housed in a single housing with multiple modules, are both systems.

[0101] The effects described in this specification are merely examples and are not limiting, and other effects may also be present.

[0102] The embodiments of the present technology are not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present technology.

[0103] Furthermore, each step described in the above flowchart can be executed by one device, or can be shared and executed by a plurality of devices.

[0104] Furthermore, when one step includes multiple processes, the multiple processes included in that one step can be executed by one device or can be shared and executed by multiple devices.

[0105] <Examples of Combinations of Configurations> The present technology can also have the following configurations.

[0106] (1) A display system comprising: a split display unit arranged in a tiled pattern to form a single display unit; an acquisition unit that acquires viewing position information indicating the viewing position of a display image displayed on the display unit; and a brightness control unit that controls the brightness of the split display unit based on the viewing position information. (2) The display system described in (1), wherein the brightness control unit controls the brightness by performing gain correction on split images obtained by dividing the display image and displayed on the split display unit. (3) The display system described in (2), wherein the acquisition unit calculates a viewing angle for a predetermined pixel that constitutes the split display unit based on the viewing position information, and the brightness control unit acquires a gain used for the gain correction based on the viewing angle. (4) The display system described in (3), wherein the brightness control unit calculates a gain used for the gain correction for pixels other than the predetermined pixel among the pixels that constitute the split display unit by linear interpolation using a gain for the predetermined pixel. (5) The display system described in (3), wherein the acquisition unit calculates the viewing angle for a corner pixel among the pixels that constitute the split display unit based on the viewing position information. (6) The display system according to (5), wherein the luminance control unit acquires a reference gain used for the gain correction of the corner pixel based on the viewing angle for the corner pixel, and calculates a gain used for the gain correction of pixels constituting the divided display unit other than the corner pixel based on the reference gain. (7) The display system according to (6), wherein the luminance control unit calculates a gain used for the gain correction of the pixels other than the corner pixel by linear interpolation using the reference gain. (8) The display system according to any of (3) to (7), wherein the luminance control unit acquires the gain used for the gain correction by referring to an LUT that receives the viewing angle as an input and outputs a gain used for the gain correction. (9) The display system according to any of (2) to (8), further comprising: a display controller connected to a plurality of luminance control units corresponding to each of the plurality of divided display units, and that supplies the divided video to each of the plurality of luminance control units.(10) The display system according to (9), wherein the acquisition unit acquires the viewing position information via the display controller. (11) The display system according to (10), wherein the acquisition unit acquires, as the viewing position information, information indicating the position of a camera that captures an image of a subject with the display unit as a background. (12) The display system according to (11), wherein the display controller supplies the viewing position information input from a tracker that tracks the camera to the acquisition unit. (13) The display system according to (10), wherein the acquisition unit acquires, as the viewing position information, information indicating the position of a viewer who actually views the display unit. (14) The display system according to any of (1) to (13), comprising: a plurality of the split display units; and a plurality of the brightness control units corresponding to each of the plurality of split display units. (15) The display system according to any of (1) to (14), wherein the acquisition unit acquires the viewing position information from at least one other split display unit that constitutes the display unit. (16) The display system according to any one of (1) to (15), further comprising a supply unit that supplies the viewing position information to at least one other split display unit that constitutes the display unit. (17) The display system according to any one of (1) to (16), wherein the split display unit is daisy-chain connected to at least one other split display unit that constitutes the display unit. (18) An information processing method, used in a display system including split display units that are arranged in a tiled pattern to form a single display unit, comprising: acquiring viewing position information indicating a viewing position of a display video displayed on the display unit; and controlling the luminance of the split display unit based on the viewing position information. (19) The information processing method according to (18), further comprising controlling the luminance by performing gain correction on split images that are displayed on the split display unit and are obtained by dividing the display video. (20) The information processing method according to (19), further comprising: calculating a viewing angle for a predetermined pixel that constitutes the split display unit based on the viewing position information; and acquiring a gain used for the gain correction based on the viewing angle.

[0107] REFERENCE SIGNS LIST 1 Imaging system, 11 Camera, 12 Display, 41 Display cabinet, 51 LED array, 61 Video server, 62 PC, 63 Display controller, 64 Tracker, 101 Control unit, 102 Register, 103 LED driver, 104 LED, 121 Viewing angle calculation unit, 122 Calculation unit, 123 Correction unit

Claims

1. A display system comprising: a split display unit arranged in a tiled pattern to form a single display unit; an acquisition unit that acquires viewing position information indicating the viewing position of the image displayed on said display unit; and a brightness control unit that controls the brightness of said split display unit based on said viewing position information.

2. The display system according to claim 1, wherein the brightness control unit controls the brightness by performing gain correction on the split images obtained by dividing the display image and displayed on the split display unit.

3. The display system according to claim 2, wherein the acquisition unit calculates a viewing angle for a predetermined pixel constituting the split display unit based on the viewing position information, and the brightness control unit acquires a gain used for the gain correction based on the viewing angle.

4. The display system according to claim 3, wherein the brightness control unit calculates a gain used for the gain correction of pixels other than the specified pixel among the pixels constituting the divided display unit by linear interpolation using the gain for the specified pixel.

5. The display system according to claim 3, wherein the acquisition unit calculates the viewing angle for a corner pixel among the pixels constituting the divided display unit based on the viewing position information.

6. The display system according to claim 5, wherein the brightness control unit obtains a reference gain to be used for the gain correction of the corner pixel based on the viewing angle for the corner pixel, and calculates a gain to be used for the gain correction of pixels other than the corner pixel among the pixels constituting the split display unit based on the reference gain.

7. The display system according to claim 6, wherein the luminance control unit calculates the gain used for the gain correction of pixels other than the corner pixels by linear interpolation using the reference gain.

8. The display system according to claim 3, wherein the brightness control unit acquires the gain used for the gain correction by referring to an LUT that receives the viewing angle as an input and outputs the gain used for the gain correction.

9. The display system according to claim 2, further comprising a display controller connected to a plurality of brightness control sections corresponding to the plurality of split display sections, respectively, and supplying the split video to the plurality of brightness control sections.

10. The display system according to claim 9, wherein the acquisition unit acquires the viewing position information via the display controller.

11. The display system according to claim 10, wherein the acquisition unit acquires, as the viewing position information, information indicating the position of a camera that captures an image of a subject with the display unit as a background.

12. The display system according to claim 11, wherein the display controller supplies the viewing position information input from a tracker that tracks the camera to the acquisition unit.

13. The display system according to claim 10, wherein the acquisition unit acquires, as the viewing position information, information indicating the position of a viewer who actually views the display unit.

14. The display system according to claim 1, comprising: a plurality of the divided display sections; and a plurality of the brightness control sections corresponding to the plurality of divided display sections, respectively.

15. The display system according to claim 1, wherein the acquisition unit acquires the viewing position information from at least one other divided display unit that constitutes the display unit.

16. The display system according to claim 1, further comprising a supply unit that supplies the viewing position information to at least one other divided display unit that constitutes the display unit.

17. The display system according to claim 1, wherein the split display unit is daisy-chain connected to at least one other split display unit that constitutes the display unit.

18. An information processing method for a display system having split display units arranged in a tiled pattern to form a single display unit, comprising: acquiring viewing position information indicating the viewing position of the image displayed on said display unit; and controlling the brightness of said split display units based on said viewing position information.

19. The information processing method according to claim 18, wherein the brightness is controlled by performing gain correction on the split images obtained by dividing the display image and displayed on the split display unit.

20. The information processing method according to claim 19, further comprising: calculating a viewing angle for a predetermined pixel constituting the split display unit based on the viewing position information; and acquiring a gain used for the gain correction based on the viewing angle.

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