JP2015210349A - Video multiplex system, image processing apparatus, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video multiplex system configured to display different video images to a user with polarization glasses and a user with naked eyes on one display device.SOLUTION: A video multiplex system includes: image acquisition means for acquiring a first image and a second image from input video data; grayscale compression means which compresses grayscale of the images so that the maximum luminance value of the first image is equal to or less than a predetermined set value and the minimum luminance value of the second image is equal to or larger than the set value; difference image generation means which generates a difference image between the second image with compressed grayscale and the first image with compressed grayscale; data format means which encodes the first image with compressed grayscale and the difference image with a predetermined video format; and video data output means which outputs the video data generated by the data format means, as output data.

Description

  The present invention relates to a video multiplexing system, and more particularly to a system for simultaneously displaying two videos on one display.

  International Publication No. 2012/035768 (Patent Document 1) discloses a projection system that makes it possible to show different images to a user wearing polarized glasses and a user with naked eyes on one screen.

International Publication No. 2012/035768

  The present invention has been made in view of the above prior art, and the present invention provides video multiplexing that enables a display device to show different images to a user wearing polarized glasses and a user with naked eyes. The purpose is to provide a system.

  As a result of earnestly examining a video multiplexing system that enables a display device to display different images for each user wearing polarized glasses and a naked eye user in one display device, the inventors have conceived the following configuration. The present invention has been reached.

  That is, according to the present invention, two images are exclusively used using a video display device including a display in which a first display area and a second display area that emit display lights having different polarization directions are arranged adjacent to each other. A video multiplexing system for enabling visual recognition, image acquisition means for acquiring a first image and a second image from input video data, and a maximum luminance value of the first image being a predetermined set value Gradation compression means for compressing the gradations of both images so that the minimum luminance value of the second image is greater than the set value, and the second image after gradation compression and the gradation compressed Difference image generating means for generating a difference image of the first image, data formatting means for encoding the first image after gradation compression and the difference image in a predetermined video format, and the data formatting means; Generated Video data output means for outputting image data as output data, and the video display device displays the first image in the first display area based on the output data, and the second display A video multiplexing system is provided that displays the second image in a region.

  As described above, according to the present invention, it is possible to provide a video multiplexing system that allows different images to be shown to a user wearing polarized glasses and a user with naked eyes on a single display device.

The schematic diagram which shows the video multiplexing system of this embodiment. 1 is a functional block diagram of an image processing apparatus and a video display apparatus according to an embodiment. The figure which shows the selection screen for a user to select a naked eye image. The conceptual diagram for demonstrating the process which the image processing apparatus of this embodiment performs. The conceptual diagram for demonstrating the process which the image processing apparatus of this embodiment performs. The conceptual diagram for demonstrating the effect of the video multiplexing system of this embodiment. The figure which shows the setting screen for a user to set a setting value. 1 is a functional block diagram of an image processing apparatus and a video display apparatus according to an embodiment. The conceptual diagram for demonstrating the process which the image processing apparatus of this embodiment performs. The conceptual diagram for demonstrating the process which the image processing apparatus of this embodiment performs. The conceptual diagram for demonstrating the effect of the video multiplexing system of this embodiment. The figure which shows the modification of the display in this embodiment.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings. In the drawings referred to below, the same reference numerals are used for common elements, and the description thereof is omitted as appropriate.

  FIG. 1 is a schematic diagram showing a video multiplexing system 100 according to an embodiment of the present invention. As shown in FIG. 1, the video multiplexing system 100 includes an image processing device 10 and a video display device 20.

  In the present embodiment, the image processing apparatus 10 outputs a result obtained by performing predetermined image processing on two video data to the video display apparatus 20 as output data. When the video display device 20 displays a video on the display 22 based on the output data, the two videos are displayed in a state where they can be viewed exclusively.

  Here, “the state in which two images are exclusively visible” specifically means that the first image is visible to the eye wearing polarized glasses and the second image is substantially invisible. On the other hand, it means that the second image becomes visible to the naked eye (meaning an eye not wearing polarized glasses) and the first image becomes substantially invisible. That is, a user who uses the video multiplexing system 100 of the present embodiment can selectively watch only one of the first video and the second video by selecting whether or not the polarized glasses are attached. Can do. Hereinafter, the mechanism will be described step by step.

  FIG. 2 shows functional blocks of the image processing apparatus 10 and the video display apparatus 20 constituting the video multiplexing system 100 of the present embodiment. As shown in FIG. 2, the image processing apparatus 10 includes a video data input unit 12, an image acquisition unit 13, a gradation compression unit 14, a differential image generation unit 15, a data format unit 16, a video data output unit 17, and a setting value change. The unit 18 and the UI unit 19 are included. On the other hand, the video display device 20 includes a display control unit 23 and a display 22.

  Here, the display 22 of the video display device 20 emits the display light having the first polarization direction and the display light having the second polarization direction and the display light having the second polarization direction as shown in FIG. The display area 22b has a configuration in which the display areas 22b are alternately arranged in a line. Such a configuration can be realized, for example, by attaching polarizing filters having opposite polarization characteristics to the even lines and odd lines of the scanning lines of the liquid crystal flat panel display. In the present embodiment, from the viewpoint of improving the viewing angle characteristics, by using a circularly polarizing filter, right-handed circularly polarized light (hereinafter referred to as right circularly polarized light) and left-handed rotation are used as display light from the adjacent display regions 22a and 22b. It is preferable that the circularly polarized light (hereinafter, referred to as left circularly polarized light) is emitted. The display 22 is not limited to a liquid crystal display that is currently in practical use as a polarized glasses type 3D-compatible flat panel display, but is configured using a self-luminous flat panel display such as a plasma display or an organic EL display. May be.

  Returning again to FIG. 2, the description will be continued. In the present embodiment, input video data is input to the image processing apparatus 10 via the video data input unit 12. Here, first, description will be given by taking as an example a usage mode in which different video data is input to the image processing apparatus 10 from each of the two input systems. As an example where video data is input from two input systems, video data is externally input from each of two video output means (two video cameras, two video players, two game machines, etc.). A case where video data is input to the functional module from each of two applications (such as two game applications) that are executed in parallel inside a computer in which the image processing apparatus 10 is mounted as a functional module. be able to.

  In response to the input video data being input from the two input systems via the video data input unit 12, the image acquisition unit 13 first converts any one of the two input video data into video data for the naked eye (hereinafter referred to as "eye data"). And the other as video data for polarized glasses (hereinafter referred to as polarized glasses video). In the present embodiment, for example, the UI unit 19 generates a selection screen for allowing the user to select two input video data, displays the selection screen on the video display device 20, and based on the user's selection via the selection screen. One of the two input video data can be determined as a naked eye video and the other as a polarized glasses image.

  FIG. 3 exemplarily shows a selection screen provided by the UI unit 19 when “sun” video data and “star” video data are input from two input systems. In this example, as shown in FIG. 3 (a), two icons ("sun" and "star") corresponding to two input video data are displayed together with the announcement "Please select the video to be viewed with the naked eye". Displayed as selectable. The user selects one of the two icons using a predetermined pointing device (mouse, joystick, touch panel, etc.) prepared for operating the video display device 20 or a remote controller. FIG. 3B shows a state where “sun” is selected as an image viewed with the naked eye. Hereinafter, the description will be continued on the assumption that “sun” is selected as an image viewed by the user with the naked eye.

  In response to the user's selection, the image acquisition unit 13 determines the video data of “sun” as a naked eye video and the video data of the other “star” as a polarized glasses image. Note that the above-described method for determining the naked eye image and the polarized glasses image is merely an example, and may be determined by another appropriate method. For example, in the method using the selection screen, the user may be notified to select the polarized glasses image, or the naked eye image and the polarized glasses image are automatically determined according to the image input port. May be.

  Next, the image acquisition unit 13 acquires a frame image of the input video data determined as a naked eye image, supplies this to the gradation compression unit 14 as a “naked eye image”, and also determines the input video data determined as a polarized glasses image. Frame image is acquired and supplied to the gradation compression unit 14 as a “polarized glasses image”.

  In response to the supply of the naked eye image A and the polarized glasses image B as shown in FIG. 4A from the image acquisition unit 13, the gradation compression unit 14 is preset with the maximum luminance value of the polarized glasses image B. The gradations of both the images are compressed so that the minimum luminance value of the naked-eye image A is greater than the set value k. For example, when the gradation of luminance of both images is 256 gradations (0 to 255), the gradation compression unit 14 calculates the luminance a of each pixel constituting the naked eye image A based on the following formula (1). By changing to the luminance a ′, the gradation of the naked eye image A can be compressed so that the minimum luminance value is larger than the set value k. In addition, the gradation compression unit 14 changes the gradation b of each pixel constituting the polarized glasses image B to the luminance b ′ based on the following formula (2), thereby changing the gradation of the polarized glasses image B to the maximum luminance value. Can be compressed to be equal to or less than the set value k. In the following formula, k is an integer of 1 to 254.

  FIG. 4B shows a naked eye image A ′ after gradation compression and a polarized glasses image B ′ after gradation compression. From FIG. 4B, it can be seen that the contrast of the naked eye image A 'and the polarized eyeglass image B' is smaller than that of the original image. Here, in the present embodiment, the contrast of the polarized glasses image B ′ of the naked eye image A ′ is determined by the size of the set value k. Specifically, the larger the set value k, the greater the contrast of the naked eye image A ′, while the lower the contrast of the polarized glasses image B ′, and the smaller the set value k, the naked eye image A ′. While the contrast of the polarized glasses image B ′ increases.

  In the present embodiment, an appropriate luminance value (for example, k = 186 when the gamma value γ = 2.2 of the video display device 20) is set as the initial value for the setting value k, and the gradation compression unit 14 First, gradation compression is performed based on the initial value. On the other hand, the set value changing unit 18 is configured to receive a change of the set value k via a predetermined user interface. Details thereof will be described later.

  The gradation compression unit 14 supplies the difference image generation unit 15 with the naked eye image A ′ and the polarized glasses image B ′ obtained by compressing the gradation according to the above-described procedure. In response to this, the difference image generation unit 15 generates a difference image between the naked eye image A ′ and the polarized glasses image B ′. Specifically, the difference image generation unit 15 inputs the luminance a ′ of the naked eye image A ′ and the luminance b ′ of each pixel constituting the polarized glasses image B ′ into the following equation (3), thereby FIG. As shown in c), a difference image C composed of pixels having luminance c is obtained. In the following formula (3), γ represents the gamma value of the video display device 20.

  The difference image generation unit 15 supplies the difference image C and the polarized glasses image B ′ generated by the above-described procedure to the data format unit 16. Upon receiving the difference image C and the polarized glasses image B ′ shown in FIG. 5A, the data format unit 16 encodes the polarized glasses image B ′ and the difference image C in a line-by-line (LBL) video format. Turn into. Specifically, as shown in FIG. 5B, first, the odd line image data is extracted from the difference image C to extract only the even line image data, and the even line of the polarized glasses image B ′ is thinned out. Only the image data of odd lines is extracted. It goes without saying that odd lines of the difference image C may be extracted and even lines of the polarized glasses image B ′ may be extracted.

  Next, as shown in FIG. 5C, the data formatting unit 16 combines the even-line image data of the difference image C and the odd-line image data of the polarized glasses image B ′ to combine the line-by-line method (LBL). ) To generate a frame image formatted.

  Here, the line-by-line system is a 3D video format for recording / transmitting 3D video data, and originally for recording / transmitting parallax video (right-eye video and left-eye video) for stereoscopic display. In the present embodiment, the difference image C and the polarized glasses image B ′ are encoded in the same format as the devised format.

  The series of processes described above are sequentially performed for each frame of two video data input to the video data input unit 12, and as a result, a frame image formatted in a line-by-line manner from the data format unit 16 is converted into video data. Sequentially supplied to the output unit 17. In response to this, the video data output unit 17 sequentially outputs the frame images to the video display device 20 as output data. In response to this, the display control unit 23 of the video display device 20 displays the difference image C and the polarized glasses image B ′ on the display 22 in a line-by-line manner.

  FIG. 6 shows a state in which the line-by-line frame image output from the video data output unit 17 is displayed on the display 22 of the video display device 20. In the example shown in FIG. 6, the odd line image data (polarized glasses image B ′) of the output data (frame image) is displayed on the odd line of the display 22, and the even line image data (difference image C) is the even number on the display 22. Displayed on the line. At this time, since the left circular polarization filter and the right circular polarization filter are attached to the odd-numbered line and the even-numbered line of the display 22, respectively, the display light of the polarized glasses image B ′ is emitted as the left-circularly polarized light, and the difference image C The display light is emitted as right circularly polarized light.

  Here, as a result of both the display light of the polarized glasses image B ′ and the display light of the difference image C reaching the retina of the eye of the user A who is viewing the display 22 with the naked eye, the user A A 'Only the sun is visible. On the other hand, as a result of only the display light of the polarized glasses image B ′ reaching the retina of the eye of the user B who is viewing the display 22 with the polarized glasses that transmit only the left circularly polarized light, the user B Only the polarized glasses image B ′ “star” is visually recognized.

  As described above, according to the present embodiment, two different videos can be displayed on the video display device 20 in an exclusively visible state, so that two users who wear polarized glasses and two naked-eye users Different contents can be simultaneously viewed on the same video display device 20. As a specific example, two video players or two video game machines are connected to the input port of the image processing device 10 to use two video display devices 20 and two different ones. A usage mode in which a movie is watched at the same time or two different games are played at the same time can be cited.

  Here, the set value changing unit 18 will be described. In the present embodiment, the optimum value of the setting value k required to realize a state in which two videos are displayed so as to be exclusively visible changes depending on the contents of the two videos that are to be displayed exclusively. In this regard, in the present embodiment, the setting value changing unit 18 receives a change of the setting value k via a predetermined user interface and dynamically sets the designated setting value k in the gradation compression unit 14. It is configured.

  FIG. 7 exemplarily shows a setting screen for the setting value k provided by the UI unit 19. In this example, as shown in FIG. 7A, a preview screen is displayed with a video to be output corresponding to the current setting value k at the center of the setting screen, and a naked-eye image “ A slider is displayed between the sun icon and the polarized star image star icon. The user operates the slider using a predetermined pointing device, a remote controller, or the like prepared for operating the video display device 20 while watching the video to be output displayed on the preview screen with the naked eye.

  As shown in FIG. 7A, when the polarized glasses image “star” that should be visible only to the user wearing polarized glasses is seen through the naked eye image “sun”, the user must While confirming the preview screen, the slider is gradually moved in the direction of the icon of the naked eye image “sun”. In response to this operation, the setting value changing unit 18 dynamically sets the setting value k corresponding to the current position of the slider in the gradation compression unit 14 (in this case, the position of the slider is that of the naked eye image “sun”). Set so that the value of k increases as the icon approaches). In response to this, the gradation compression unit 14 compresses the luminance gradation of the naked eye image “sun” and the polarized glasses image “star” using the newly set value k. Thereafter, the video to be output is displayed on the preview screen by the cooperation of the difference image generation unit 15, the data formatting unit 16, and the video data output unit 17. In this example, as shown in FIGS. 7B to 7C, as the position of the slider approaches the icon of the naked eye image “sun”, the polarized glasses image “star” on the preview screen gradually becomes thinner. The user stops the operation of the slider and determines the set value k when the polarized glasses image “star” becomes invisible with the naked eye.

  As described above, according to the present embodiment, it is possible to intuitively set the optimal setting value k while watching the video (preview) scheduled to be output.

  Next, as shown in FIG. 8, the video display device 20 includes a format conversion unit 24 that converts video data encoded in a 3D video format other than the line-by-line format into video data in the line-by-line format. The case will be described.

  In this case, the data formatting unit 16 of the image processing apparatus 10 can encode the difference image C and the polarized glasses image B ′ in a 3D video format other than the line-by-line method that the video display apparatus 20 can handle. Currently, as a 3D video format, in addition to the line-by-line method, a side-by-side method, a top-and-bottom method, a frame packing method, a frame sequential method, a checkerboard method, and the like are adopted. For example, when the format conversion unit 24 supports the side-by-side method, the data format unit 16 encodes the difference image C and the polarized glasses image B ′ by the side-by-side method, and outputs the output data via the video data output unit 17. The video can be output to the video display device 20.

  In this case, in the video display device 20, the format conversion unit 24 converts the output data encoded by the side-by-side method into video data of the line-by-line method, and the display control unit 23 converts the difference image C and the polarization by the line-by-line method. The glasses image B ′ is displayed on the display 22.

  Heretofore, the case where the image processing apparatus 10 directly outputs output data from the video data output unit 17 to the video display apparatus 20 has been described. However, the video data output unit 17 transmits the output data to a network (such as a LAN or the Internet). Needless to say, it can be output to a storage medium (optical media, non-volatile memory, data storage, etc.). In this case, the video display device 20 receives the output data of the image processing device 10 via the network or digital broadcast and displays it on the display 22 or reads it from the storage medium and displays it on the display 22.

  Next, a case where the image processing apparatus 10 receives video data encoded in the 3D video format will be described.

  In recent years, with the widespread use of 3D-compatible flat panel displays, package media containing 3D video content has been sold, and digital broadcasts that broadcast 3D video content have been implemented, creating an environment for using 3D video content It is being done. Here, in view of the fact that the video multiplexing system of the present invention can directly use a polarized glasses type 3D-compatible flat panel display, in the near future, two types of video will be converted into 3D video for use in the video multiplexing system of the present invention. It is assumed that packaged media recorded in a format and digital broadcasting that broadcasts two types of video in a 3D video format are provided. In this regard, an embodiment in which video data obtained by encoding two types of video in a 3D video format is input will be described below. In the following description, FIG. 2 will be referred to as appropriate.

  In response to acquiring video data obtained by encoding two types of video in a 3D video format from package media or a download version thereof, or by digital broadcasting or streaming, the image acquisition unit 13 first acquires the video data. The format of the input video data is determined, and frame images of two videos included in the input video data are acquired by a method corresponding to the determined format.

  For example, when the input video data is side-by-side format data, the image acquisition unit 13 divides each frame constituting the input video data into two in the horizontal direction, and doubles the divided image in the horizontal direction. To obtain two frame images. When the input video data is top-and-bottom format or frame-packing format data, the image acquisition unit 13 divides each frame constituting the input video data into two in the vertical direction, and the top-and-bottom format As for, the divided images are expanded twice in the vertical direction to obtain two frame images, and for the frame packing method, the divided images are obtained as they are as two frame images. Further, if the input video data is frame sequential format data, the image acquisition unit 13 divides the input video data into odd frames and even frames, and acquires the divided frames as two types of frame images. To do. Further, when the input video data is a line-by-line method, the image acquisition unit 13 divides the odd lines and the even lines of each frame constituting the input video data, and determines a missing portion in each of the divided images. Two frame images are obtained by interpolation using the above method.

  Next, the image acquisition unit 13 determines one of the two videos included in the input video data as a naked eye video and the other as a polarized glasses video. This determination may be made based on the user's selection through the selection screen similar to the above-described embodiment, or to discriminate between the naked eye image and the polarized glasses image when recording and transmitting two images. Assuming that the metadata is embedded, the metadata may be automatically determined by referring to the metadata.

  When the naked eye image and the polarized glasses image are determined for the two images included in the input image data, the image acquisition unit 13 selects the frame image related to the naked eye image from the two frame images acquired by the above-described procedure. "Is supplied to the gradation compression unit 14 and the frame image related to the polarized glasses image is supplied to the gradation compression unit 14 as" polarized glasses image ". Since the subsequent processing is the same as that described in the previous embodiment, further description thereof is omitted here.

  As described above, according to the present embodiment, the two types of video are exclusively viewed on the video display device 20 based on various media that provide video data obtained by encoding two types of video in the 3D video format. It can be displayed in a possible state.

  Next, simultaneous viewing of 3D video and 2D video, which is a characteristic usage of the video multiplexing system 100 of this embodiment, will be described. In the following description, FIG. 2 will be referred to as appropriate.

  When the video multiplexing system 100 of the present embodiment is used for simultaneous viewing of 3D video and 2D video, as shown in FIG. 9A, the image acquisition unit 13 includes two parallax videos that constitute 3D video data. One of the frame images is acquired as the naked eye image A, and the other frame image is acquired as the polarized glasses image B. In this example, the parallax image for the right eye is acquired as the naked eye image A, and the parallax image for the left eye is acquired as the polarized glasses image B.

  Next, as shown in FIG. 9B, after the gradation compression unit 14 compresses the gradations of both images, as shown in FIG. 9C, the difference image generation unit 15 performs the gradation compression. A difference image C between the naked eye image A ′ and the polarized glasses image B ′ after gradation compression is generated.

  After that, as shown in FIGS. 10A to 10C, the data formatting unit 16 combines the even lines of the difference image C and the odd lines of the polarized glasses image B ′ to generate a line-by-line (LBL) frame. An image is generated, and the video image output unit 17 outputs the generated frame image to the video display device 20 as output data.

  FIG. 11 shows a state in which the line-by-line frame image output from the video data output unit 17 is displayed on the display 22 of the video display device 20. In the example shown in FIG. 11, the odd line image data (polarized glasses image B ′) of the output data (frame image) is displayed on the odd line of the display 22, and the even line image data (difference image C) is the even number on the display 22. Displayed on the line. At this time, since the left circular polarization filter and the right circular polarization filter are attached to the odd-numbered line and the even-numbered line of the display 22, respectively, the display light of the polarized glasses image B ′ is emitted as the left-circularly polarized light, and the difference image C The display light is emitted as right circularly polarized light.

  Here, in this usage mode, as shown in FIG. 11, the user A who wants to view 2D video looks at the display 22 with naked eyes, whereas the user B who wants to watch 3D video is left-circularly polarized only to the left eye. The display 22 is viewed with wearing one-eye polarized glasses containing a filter. As a result, both the display light of the polarized glasses image B ′ and the display light of the difference image C arrive at the retina of the user A's eye and form an image. As a result, the user A only has the right eye image A ′ (naked eye image). Visually check.

  On the other hand, both the display light of the polarized glasses image B ′ and the display light of the difference image C reach the retina of the right eye (naked eye) of the user B wearing the single-eye polarized glasses and watching the display 22 and form an image. As a result, the right eye (naked eye) of the user B views only the right eye image A ′ (naked eye image). On the other hand, as a result of only the display light of the polarized glasses image B ′ reaching the retina of the left eye of the user B (with the polarization filter attached) and forming an image, the left eye of the user B (with the polarization filter attached) is the image B ′ for the left eye (polarized glasses). (Image) only. As a result, the right-eye image A ′ and the left-eye image B ′ are synthesized in the brain of the user B, and the user B visually recognizes the 3D image.

  As described above, according to this mode of use, 3D video and 2D video can be displayed on the video display device 20 in a state where the video display device 20 can be visually recognized exclusively. Parents who don't want to watch 3D video can view 2D video with the naked eye to the child, while wearing a single-eye polarized glasses and watching the same 3D video with the child. Become.

  Although the present invention has been described with the embodiment, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, taking into account that the human eye is insensitive to vertical resolution degradation, the display 22 of the video display device 20 emits display light having the first polarization direction. Although the example which employ | adopted the structure which arrange | positioned the display area 22b which radiate | emits the display area 22a which emits the display light which has the 2nd polarization direction alternately adjacently in the horizontal line form was shown, Theoretically, the display area 22a and 22b may be alternately arranged in the form of a vertical line as shown in FIG. 12 (a). As shown, the display areas 22a and 22b may be alternately arranged adjacent to each other in a checkered pattern. In this case, it is necessary to configure the data format unit 16 of the image processing device 10 or the format conversion unit 24 of the video display device 20 to output video data in an appropriate format according to the arrangement mode of the display areas 22a and 22b. Needless to say. In addition, it is included in the scope of the present invention as long as the effects and effects of the present invention are exhibited within the scope of embodiments that can be considered by those skilled in the art.

  Note that each function of the above-described embodiment can be realized by a device-executable program described in C, C ++, C #, Java (registered trademark), and the like. The program of this embodiment includes a hard disk device, a CD-ROM. , MO, DVD, flexible disk, EEPROM, EPROM and the like can be stored and distributed in a device-readable recording medium, and can be transmitted via a network in a format that other devices can.

DESCRIPTION OF SYMBOLS 10 ... Image processing apparatus 12 ... Video data input part 13 ... Image acquisition part 14 ... Gradation compression part 15 ... Difference image generation part 16 ... Data format part 17 ... Video data output part 18 ... Setting value change part 19 ... UI part 20 ... Video display device 22 ... Display 23 ... Display control unit 24 ... Format conversion unit 100 ... Video multiplexing system

Claims (23)

An image for allowing two images to be exclusively viewed using an image display device including a display in which a first display area and a second display area that emit display lights having different polarization directions are arranged adjacent to each other. A multiplexing system,
Image acquisition means for acquiring a first image and a second image from input video data;
Gradation compression means for compressing the gradations of both images so that the maximum luminance value of the first image is not more than a predetermined setting value and the minimum luminance value of the second image is larger than the setting value;
Difference image generation means for generating a difference image between the second image after gradation compression and the first image after gradation compression;
Data formatting means for encoding the first image after gradation compression and the difference image in a predetermined video format;
Video data output means for outputting the video data generated by the data formatting means as output data,
The video display device
Displaying the first image in the first display area and displaying the second image in the second display area based on the output data;
Video multiplexing system. The first display area and the second display area are alternately arranged in a line,
2. The video multiplexing system according to claim 1, wherein the data formatting means encodes in a line-by-line video format.   The video multiplexing system according to claim 1, further comprising setting value changing means for changing the setting value to a value designated by a user.   The said image acquisition means acquires the image for polarized glasses determined by the user as the first image, and acquires the image for the naked eye determined by the user as the second image. The video multiplexing system according to claim 1.   5. The image acquisition unit according to claim 1, wherein the image acquisition unit acquires the first image from first input video data and acquires the second image from second input video data. 6. Video multiplexing system.   5. The video multiplexing system according to claim 1, wherein the image acquisition unit acquires the first image and the second image from input video data encoded in a 3D video format. 6. .   The video multiplexing system according to any one of claims 1 to 6, wherein the difference image generation unit adjusts a luminance value of the difference image according to a gamma value of the video display device.   The video multiplexing system according to claim 1, wherein the display light is right-turning or left-turning circularly polarized light.   The video multiplexing system according to any one of claims 1 to 8, wherein the first image and the second image are parallax images for stereoscopic display. An image processing device for generating video data that can be displayed by a video display device including a display in which a first display region and a second display region that emit display lights having different polarization directions are disposed adjacent to each other,
Image acquisition means for acquiring a first image and a second image from input video data;
Gradation compression means for compressing the gradations of both images so that the maximum luminance value of the first image is not more than a predetermined setting value and the minimum luminance value of the second image is larger than the setting value;
Difference image generation means for generating a difference image between the second image after gradation compression and the first image after gradation compression;
Data formatting means for encoding the first image after gradation compression and the difference image in a predetermined video format;
Video data output means for outputting video data generated by the data formatting means as output data,
Image processing device. The first display area and the second display area are alternately arranged in a line,
The image processing apparatus according to claim 10, wherein the data formatting means performs encoding in a line-by-line video format.   The image processing apparatus according to claim 10, further comprising a setting value changing unit that changes the setting value to a value designated by a user.   The said image acquisition means acquires the image for polarized glasses determined by the user as the first image, and acquires the image for the naked eye determined by the user as the second image. An image processing apparatus according to claim 1.   The said image acquisition means acquires the said 1st image from 1st input video data, and acquires the said 2nd image from 2nd input video data. Image processing apparatus.   The image processing apparatus according to claim 10, wherein the image acquisition unit acquires the first image and the second image from input video data encoded in a 3D video format.   The image processing device according to claim 10, wherein the difference image generation unit adjusts a luminance value of the difference image according to a gamma value of the video display device. A computer for generating video data that can be displayed by a video display device including a display in which a first display area and a second display area that emit display lights having different polarization directions are arranged adjacently,
Image acquisition means for acquiring a first image and a second image from input video data;
Gradation compression means for compressing the gradations of both images so that the maximum luminance value of the first image is less than or equal to a predetermined set value and the minimum luminance value of the second image is greater than the set value;
Difference image generation means for generating a difference image between the second image after gradation compression and the first image after gradation compression;
Data formatting means for encoding the first image after gradation compression and the difference image in a predetermined video format;
Video data output means for outputting the video data generated by the data formatting means as output data;
A computer-executable program that functions as a computer. The first display area and the second display area are alternately arranged in a line,
The program according to claim 17, wherein the data formatting means encodes in a line-by-line video format. Said computer further
The program according to claim 17 or 18, for causing a function of setting value changing means for changing the setting value to a value designated by a user.   The image acquisition means acquires the image for polarized glasses determined by the user as the first image, and acquires the image for the naked eye determined by the user as the second image. A program according to any one of the above.   The said image acquisition means acquires the said 1st image from 1st input video data, and acquires the said 2nd image from 2nd input video data, The any one of Claims 17-20 Program.   The program according to any one of claims 17 to 20, wherein the image acquisition unit acquires the first image and the second image from input video data encoded in a 3D video format.   The program according to any one of claims 17 to 22, wherein the difference image generation unit adjusts a luminance value of the difference image according to a gamma value of the video display device.