JP5257243B2 - 3D image display apparatus and 3D image display method - Google Patents

Description

  The present invention relates to a stereoscopic video display device and a stereoscopic video display method capable of displaying stereoscopic video based on binocular parallax on a display.

  2. Description of the Related Art In recent years, stereoscopic image display devices that present two or more images with parallax on a display and perceive the viewer as if the object exists stereoscopically have attracted attention. There are various formats for stereoscopic video data for realizing such video display, and there are various display formats depending on the display even when the final display is reached. The stereoscopic video display device plays a role of converting the format of such stereoscopic video data into a display format (stereoscopic display data) adapted to the display.

  As an example of stereoscopic video data input to the stereoscopic video display device, a side-by-side method is used in which a left-eye video is displayed on the left half of the effective video and a right-eye video is displayed on the right half. In such a side-by-side method, the right-eye video and the left-eye video are individually captured by a pair of cameras, or adjusted so as to generate binocular parallax, and are separately formed as different videos. Further, as an example of a display, there is a display provided with polarizing filters having different polarization characteristics every other line (for each line).

  The stereoscopic video display device displays the left-eye video and right-eye video horizontal lines in such a side-by-side format alternately on each other (hereinafter simply referred to as line sequential processing) and displays them on a display having different polarization characteristics. 3D display data is generated. The observer can visually recognize the left-eye image shown in the alternate line with the left eye and the right-eye image with the right eye through the polarizing glasses, and recognize the stereoscopic image based on the binocular parallax.

  On the other hand, the stereoscopic video display device can display information video data related to the input stereoscopic video data, for example, an OSD (On Screen Display) indicating the broadcast channel if it is a television broadcast. For example, Patent Document 1 describes a technique for superimposing an OSD on an arbitrary position of a display capable of displaying a stereoscopic video.

Japanese Patent Laid-Open No. 9-23450

  However, when the stereoscopic video data is input to the stereoscopic video display device, as shown in FIG. 16A, information video data such as OSD that does not consider stereoscopic display is the right-eye video or left-eye of the stereoscopic video data. When the image is preliminarily superimposed on only one of the images, the unintended discontinuous image 12 is displayed by the subsequent line sequential processing as shown in FIG. Such discontinuous image 12 does not form an image even through polarized glasses, and not only the display contents cannot be understood, but also the image emits light unnecessarily and places a burden on the eyes.

  In view of such a problem, the present invention improves the continuity of information video data in stereoscopic display data even when information video data not considering stereoscopic vision is superimposed on stereoscopic video data. An object of the present invention is to provide a stereoscopic video display device and a stereoscopic video display method capable of reducing the burden on the eyes and realizing a more natural stereoscopic video display.

In order to solve the above problems, a stereoscopic video display apparatus according to the present invention includes a video acquisition unit that acquires stereoscopic video data in which a left-eye video and a right-eye video for realizing stereoscopic vision by binocular parallax are divided and formed. Compares the line sequential part that generates the 3D display data for displaying on the display by alternately juxtaposing the horizontal lines of the left eye video and the right eye video in the 3D video data, and the adjacent lines in the 3D display data. To determine whether or not the information video data indicating information related to the operation display of the stereoscopic video data or the stereoscopic display data displayed on the display is superimposed, and generate a control signal for identifying the section where the information video data is superimposed a control signal generator for a first line image at the basis of the control signal, information video data is superimposed sections, a The video of the first line in the section where the video of the first line is newly generated by combining the video of one or a plurality of second lines adjacent to the line or the information video data is superimposed A data processing unit that replaces the image with a video of a second line adjacent to the first line, and a video output unit that outputs the processed stereoscopic display data.

  When the information video data is superimposed only on either the right-eye video or the left-eye video of the stereoscopic video data, a difference is generated between the horizontal lines of the left-eye video and the right-eye video that are alternately juxtaposed. In the present invention, when there is a difference between adjacent lines, it is assumed that the information video data is superimposed there, a control signal is generated, and the section in which the control signal indicates the superimposition of the information video data, 3D display data is processed to improve the continuity of information video data. With this configuration, information video data that does not take stereoscopic vision into consideration can be imaged on the surface of the display, the burden on the eyes can be reduced, and more natural stereoscopic video display of stereoscopic video data can be realized.

The control signal generation unit horizontally converts the difference between evaluation values that are values of one or a plurality of evaluation items selected from R, G, B, luminance, color difference, and saturation between adjacent lines in the stereoscopic display data. Even if low-pass filtering is performed to calculate a smoothed difference value, and whether or not the information video data is superimposed is determined based on whether the smoothed difference value exceeds a predetermined threshold value Good.

  As described above, the section in which the information video data is superimposed is derived by the difference between adjacent lines of the stereoscopic display data. However, since the stereoscopic display data includes horizontal parallax, a difference may occur in the contour portion of the object. Here, it is possible to reliably extract only the difference due to the information video data by performing horizontal low-pass filtering on the derived difference and excluding the difference due to the horizontal parallax.

  Since the information video data is often expressed in a single color or several colors, the stereoscopic display data in the section where the information video data is superimposed has a striped pattern due to the difference between the left and right eye images. Here, the difference between adjacent lines can be smoothed by synthesizing the image of the first line of interest and the image of the second line adjacent to the first line. It is possible to improve the continuity of information video data in the data.

  As described above, the stereoscopic display data in the section where the information video data is superimposed has a striped pattern based on the difference between the left and right eye videos. Here, the video of both lines can be shared by replacing the video of the first line with the video of the second line adjacent to the first line. It becomes possible to improve the nature.

When replacing the video of the first line in the section in which the information video data is superimposed with the video of the second line adjacent to the first line, the data processing unit odd-numbered lines or even-numbered lines Only one of these is defined as the first line. Unlike the above-described video synthesis between lines, if the video replacement between lines is performed on all the lines, the resulting video is simply shifted by one line from the original video. Here, by replacing only one of the odd-numbered lines or even-numbered lines as the first line every other line, the video of either the odd-numbered lines or even-numbered lines is converted to the other Can be shared with the video of the line.

A typical configuration of the stereoscopic video display method of the present invention is to acquire stereoscopic video data in which a left-eye video and a right-eye video for realizing stereoscopic vision by binocular parallax are divided and obtain the left eye in the stereoscopic video data. 3D display data to be displayed on the display by alternately juxtaposing the horizontal lines of the video and the right eye video, and the 3D video data or the 3D displayed on the display by comparing adjacent lines in the 3D display data It is determined whether or not information video data indicating information related to operation display of display data is superimposed, a control signal for identifying a section in which the information video data is superimposed is generated, and information video data is generated based on the control signal. The video of the first line in the section where is superimposed and the video of one or more second lines adjacent to the first line are newly combined Generating an image of one line, or a picture of the first line in the section where the information image data is superimposed, the information image data by replacing the image of the second line adjacent to the first line 3D display data of a section in which is superimposed, and the processed 3D display data is output.

  The components corresponding to the technical idea of the above-described stereoscopic video display device and the description thereof can be applied to the stereoscopic video display method.

  The stereoscopic video display device of the present invention improves the continuity of the information video data in the stereoscopic display data even when information video data not considering stereoscopic vision is superimposed on the stereoscopic video data. It is possible to realize a more natural 3D image display.

It is the functional block diagram which showed the schematic function of the three-dimensional video display apparatus. It is explanatory drawing for demonstrating the display structure of a display. It is explanatory drawing for demonstrating the format of stereoscopic video data. It is explanatory drawing for demonstrating operation | movement of a line sequential part. It is explanatory drawing for demonstrating operation | movement of a line sequential part. It is explanatory drawing explaining the line sequential processing result in case information video data is previously superimposed. It is the functional block diagram which showed the specific function of the control signal production | generation part. It is explanatory drawing for demonstrating operation | movement of a control-signal production | generation part. It is explanatory drawing for demonstrating operation | movement of a control-signal production | generation part. It is the functional block diagram which showed the specific function of the data processing part. It is explanatory drawing which showed the stereoscopic display data processed with the changeover switch. It is the functional block diagram which showed the other example of a connection of a data processing part. It is the functional block diagram which showed the other example of the data processing part. It is explanatory drawing which showed the stereoscopic display data processed with the changeover switch. It is the flowchart which showed the whole flow of the three-dimensional video display method. It is explanatory drawing for demonstrating the superimposition process of the information video data in the past.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(3D image display device 100)
FIG. 1 is a functional block diagram illustrating schematic functions of the stereoscopic video display device 100. As shown in FIG. 1, the stereoscopic video display apparatus 100 is connected to a display 110, and includes a video acquisition unit 150, a video processing unit 152, a line sequential unit 154, a control signal generation unit 156, and a data processing unit 158. , And a video output unit 160. Although the case where the display 110 and the stereoscopic video display device 100 are configured separately will be described here, they may be configured integrally. Hereinafter, the display 110 that enables stereoscopic display will be described prior to the stereoscopic video display device 100.

  FIG. 2 is an explanatory diagram for explaining a display configuration of the display 110. Since the display surface 112 of the display 110 is provided with polarizing filters having different polarization characteristics every other line (for each line), the odd-numbered lines 114 and the even-numbered lines 116 have different polarization characteristics. The observer who observes the display 110 passes the stereoscopic display data (left-eye stereoscopic display data 120) displayed on, for example, the odd-numbered line 114 through the polarized glasses 118 having different polarization characteristics on the left and right, and the even-numbered line with the left eye. The stereoscopic display data (right-eye stereoscopic display data 122) displayed on 116 is visually recognized by the right eye, and an object can be perceived at an imaging position 124 different from the display surface 112 by stereoscopic video based on binocular parallax. .

  As shown in FIG. 2, the stereoscopic display data displayed on the display surface 112 of the display 110 includes left-eye stereoscopic display data 120 corresponding to the left-eye image and right-eye stereoscopic display data 122 corresponding to the right-eye image in line units. Are displayed alternately. The object included in the stereoscopic display data can be displayed in either stereoscopic view (crossing method) or parallel view (parallel method). The object included in the left-eye stereoscopic display data 120 and the right-eye stereoscopic display data 122 By shifting the position in the horizontal direction relative to the included object relatively to the left and right, the object can be imaged at either the back side or the near side of the display surface 112. At this time, if the shift amount in the horizontal direction is set to 0, the object is imaged on the display surface 112 of the display 110.

  In FIG. 2 and the drawings used in the following description, the number of horizontal lines is 12 for ease of understanding, but the number of lines depends on the structure of the display 110, the number of scanning lines of stereoscopic video data, and the like. Can be set arbitrarily.

  The video acquisition unit 150 of the stereoscopic video display device 100 converts the stereoscopic video data obtained by dividing the left-eye video and the right-eye video for realizing stereoscopic vision by binocular parallax into an external broadcast station 126 or a communication network (Internet). Or LAN) 128. In addition, stereoscopic video data can be acquired internally from a recording medium such as a DVD or a Blu-ray disc.

  FIG. 3 is an explanatory diagram for describing a format of stereoscopic video data. There are a plurality of formats of stereoscopic video data that can be acquired by the video acquisition unit 150, and parameters such as the number of pixels may be different in each format. Here, as a typical example, as shown in FIG. 3A, a left-eye image (left-eye stereoscopic image data) 130 for causing the left eye to visually recognize the left half of the effective image and a right eye to the right half are shown. 3D image data 134 according to the side-by-side method having a right-eye image (right-eye 3D image data) 132 for allowing the left eye to visually recognize the image as shown in FIG. 3B. It is assumed that the stereoscopic video data 140 according to the top-and-bottom method (abbe-and-bello method) having the left-eye image 136 for the right eye and the right-eye image 138 for the right eye to visually recognize in the lower half is used. The effective video is a video obtained by removing a non-display area (blank period) from the entire video. In the case of the side-by-side method, the right-eye stereoscopic video data 134 for allowing the right eye to visually recognize is arranged in the left half of the effective video, and the left-eye stereoscopic video data 132 for allowing the left eye to visually recognize the right eye is arranged in the right half of the effective video. The stereoscopic video data 134 may be used. Further, in the case of the top-and-bottom method, right-eye stereoscopic video data 138 for allowing the right eye to visually recognize is displayed in the upper half of the effective image, and left-eye stereoscopic video data 136 for allowing the left eye to be viewed in the lower half of the effective image. The stereoscopic video data 140 to be arranged may be used.

  In such stereoscopic image data 134 and 140, the left eye images 130 and 136 and the right eye images 132 and 138 are individually captured by a pair of cameras, or adjusted so that binocular parallax occurs. . However, the left-eye image 130 and the right-eye image 132 of the stereoscopic image data 134 according to the side-by-side method of the present embodiment have the same vertical resolution as the finally displayed stereoscopic display data, but the horizontal resolution is halved. Has been reduced. Accordingly, when the number of pixels of the effective image of the entire screen is 1920 × 1080, the number of pixels of the left eye image 130 and the right eye image 132 is 960 × 1080.

  The video processing unit 152 performs RGB processing (γ correction and color correction), enhancement processing, noise reduction processing, and the like on the side-by-side and top-and-bottom stereoscopic video data 134 and 140 acquired through the video acquisition unit 150. Perform video signal processing. The stereoscopic video data 134 and 140 that have undergone predetermined video signal processing are held in a memory (not shown).

  The line sequential unit 154 controls the read / write address of the memory that holds the stereoscopic video data 134 and 140 on which the predetermined video signal processing has been performed, thereby horizontally generating the left-eye video and the right-eye video in the stereoscopic video data 134 and 140. Stereo display data to be displayed on the display 110 is generated by arranging the lines alternately.

  4 and 5 are explanatory diagrams for explaining the operation of the line sequential unit 154. In particular, FIG. 4 shows the stereoscopic video data 134 from the side-by-side format, and FIG. 5 shows the stereoscopic video data 140 from the top-and-bottom format. Display data 142 is generated. As shown in FIG. 4A, when the video acquisition unit 150 acquires the side-by-side stereoscopic video data 134, the line sequential unit 154 includes the odd-numbered lines of the video L1, L3, L5, L7, L9, and L11, and even-numbered lines R2, R4, R6, R8, R10, and R12 of the right eye image 132 are extracted, and the left ends of the lines of each eye image are aligned and rearranged alternately.

  Specifically, the first-line image L1 of the left-eye image 130 in FIG. 4A is changed to the first-line image L1 ′ of the stereoscopic display data 142 in FIG. 4B, and the right-eye image in FIG. The video R2 of the second line of the video 132 is converted into the video R2 ′ of the second line of the stereoscopic display data 142 in FIG. Accordingly, the even-numbered line images L2, L4, L6, L8, L10, and L12 of the left-eye image 130 and the odd-numbered line images R1, R3, R5, R7, R9, and R11 of the right-eye image 132 are used. Will not be. Here, odd-numbered lines are extracted from the left-eye image 130 and even-numbered lines are extracted from the right-eye image 132, but naturally, even-numbered lines are extracted from the left-eye image 130 and odd-numbered lines are extracted from the right-eye image 132. May be.

  However, since the horizontal resolution of each eye image of the stereoscopic video data 134 is ½ of the stereoscopic display data 142, when generating the stereoscopic display data 142 from the stereoscopic video data 134, the horizontal resolution is doubled. It must be enlarged. Generation of a new pixel accompanying such horizontal resolution enlargement can use linear interpolation or other filtering. The horizontal resolution magnification is appropriately adjusted according to the format of the stereoscopic video data 134 or the ratio of the number of pixels in the horizontal direction between each eye image of the stereoscopic video data 134 and the stereoscopic display data 142.

  Further, as shown in FIG. 5A, when the video acquisition unit 150 acquires the top-and-bottom stereoscopic video data 140, the line sequential unit 154 displays the video L1, L2, and the video L1, L2, all lines of the left-eye video 136. L3, L4, L5, and L6 and the images R1, R2, R3, R4, R5, and R6 of all lines of the right eye image 138 are alternately rearranged with the left ends of the lines aligned. Accordingly, the first line image L1 of the left eye image 136 in FIG. 5A is changed to the first line image L1 of the stereoscopic display data 142 in FIG. 5B, and the right eye image 132 in FIG. The image R1 of the first line is transferred to the image R1 of the second line of the stereoscopic display data 142 in FIG. 5B without executing enlargement processing or reduction processing. As described above, since there is no line that is not used in the top-and-bottom method and there is no enlargement of the horizontal resolution, it is possible to suppress the loss of information.

  As described with reference to FIGS. 4 and 5, when line sequential processing is performed on the stereoscopic video data 134 and 140 in which the left eye video and the right eye video are appropriately formed, the object in the video is correctly imaged. Stereoscopic display data capable of displaying a stereoscopic video is generated. However, if information video data that does not take stereoscopic display into consideration is randomly superimposed on the stereoscopic video data 134 and 140, the information video data may be disturbed by the line sequential processing. Here, the information video data indicates information regarding operation display indicating information regarding the stereoscopic video data 134 and 140 or information regarding operation display of the stereoscopic display data 142 displayed on the display 110. For example, as the information video data 180 related to the stereoscopic video data 134 and 140, a program or content received by the stereoscopic video display device 100 from the broadcasting station 126 or received via the communication network 128 such as the Internet, a LAN, or a dedicated line is specified. For example, there is an OSD that visualizes information indicating a channel, a program title, a display mode, and the like. In addition, the information video data may be information related to operation display such as “play” and “stop” when a medium on which a stereoscopic video is recorded is played by a player.

  FIG. 6 is an explanatory diagram for explaining a line sequential processing result when the information video data 180 is superimposed in advance. When the stereoscopic video data 134 and 140 are input to the stereoscopic video display device 100, the information video data 180 that is not considered for stereoscopic display is the left-eye of the stereoscopic video data 134 and 140, for example, as shown in FIG. When the image is preliminarily superimposed only on the video, the unintended discontinuous video is displayed by the subsequent line sequential processing as shown in FIG. 6B. In the present embodiment, even if the information video data is preliminarily superimposed on the stereoscopic video data in this way, the control signal generation unit 156 and the data processing unit 158 described below perform the information video data in the stereoscopic display data. Increases continuity, reduces the strain on the eyes, and realizes a more natural 3D image display.

  The control signal generation unit 156 compares adjacent lines in the stereoscopic display data 142 to determine whether the information video data 180 is superimposed, and refers to the horizontal synchronization signal and the vertical synchronization signal of the stereoscopic display data 142. However, the control signal is generated. Here, the control signal is a signal that can specify an arbitrary section from an arbitrary position of the horizontal synchronization signal, and represents a position where the information video data 180 is superimposed on the stereoscopic display data 142.

  FIG. 7 is a functional block diagram illustrating specific functions of the control signal generation unit 156. As shown in FIG. 7, the control signal generation unit 156 includes a line memory 210, a subtractor 212, an absolute value conversion unit 214, a horizontal LPF (Low Pass Filter) 216, and a control signal output unit 218. Composed.

  The line memory 210 temporarily holds the stereoscopic display data 142 in units of lines (horizontal lines), and delays the input data by one line. Therefore, it is possible to refer to the stereoscopic display data 142 one line before the adjacent line.

  The subtractor 212 derives a difference in evaluation value between the stereoscopic display data 142 of the previous line held in the line memory 210 and the stereoscopic display data 142 of the current line. Here, the evaluation value is a value of one or a plurality of evaluation items selected from R (Red), G (Green), B (Blue), luminance, color difference, and saturation.

  8 and 9 are explanatory diagrams for explaining the operation of the control signal generation unit 156. FIG. For example, when the stereoscopic video data 134 on which the information video data 180 is superimposed is subjected to line sequential processing and the stereoscopic display data 142 as shown in FIG. 6B is generated, the control signal generator 156 receives the second line. When the video R2 ′ is input, the subtracter 212 subtracts the video R2 ′ of the second line from the video L1 ′ of the first line to obtain the subtraction result shown in FIG. The portion where the subtraction result is not 0 is a portion where the left eye video and the right eye video are different, and in this embodiment, it can be determined that the information video data 180 is superimposed on that portion.

  The absolute value converting unit 214 converts the difference of the subtractor 212 into an absolute value. In the present embodiment, the scalar amount of the difference between the evaluation values in the video is necessary, and the sign of the difference is not a problem. Here, the absolute value is converted into an absolute value by the absolute value conversion unit 214, so that only the scalar quantity can be properly evaluated.

  The horizontal LPF 216 performs horizontal low-pass filtering on the difference between the evaluation values of the stereoscopic display data 142 converted into absolute values by the absolute value conversion unit 214. For example, when horizontal low-pass filtering is applied to the subtraction result shown in FIG. 8A, the result shown in FIG. 8B is obtained.

  As described above, the section in which the information video data 180 is superimposed is derived by the difference between adjacent lines of the stereoscopic display data 142. However, since the stereoscopic display data 142 includes horizontal parallax, a difference may occur in the contour portion of the object. However, the difference due to the horizontal parallax often has a higher frequency than the difference due to the superimposition of the information video data, and the interval (width) in which the difference occurs is also short. Here, a difference value obtained by smoothing the derived difference by performing horizontal low-pass filtering is calculated. Based on the difference value after smoothing, a difference due to superimposition of information video data and a difference due to horizontal parallax are distinguished.

  The control signal output unit 218 determines whether or not the difference amount smoothed by the horizontal LPF 216 exceeds a predetermined threshold in order to separate the difference due to the superimposition of the information video data and the difference due to the horizontal parallax. For the section exceeding, the control signal 182 is turned on, and the other sections are turned off, assuming that the information video data is superimposed. For example, the control signal 182 as shown in FIG. 8C can be generated by comparing the result of the horizontal LPF 216 shown in FIG. Accordingly, the control signal 182 of the entire stereoscopic display data 142 as shown in FIG. 9A indicates the position of the display line indicated by the oblique lines in FIG. 9B with respect to the horizontal synchronization signal of the stereoscopic display data 142. It will be. The control signal 182 is used to process discontinuous information video data superimposed on the stereoscopic display data 142. Here, by excluding the difference due to the horizontal parallax that does not satisfy the threshold, only the difference due to the information video data 180 can be reliably extracted.

  The control signal generation unit 156 described above uses the subtractor 212, the horizontal LPF 216, and the like to specify the section in which the information video data 180 of the stereoscopic display data 142 is superimposed and generates the control signal 182. Various other configurations can be applied as long as the overlapping section of the video data 180 can be specified. In addition, when a signal for specifying a section in which the information video data 180 is superimposed on the stereoscopic video data 134 and 140 is added in advance, the signal can be used as it is as a control signal.

  Based on the control signal 182 generated by the control signal generation unit 156, the data processing unit 158 processes the stereoscopic display data 142 in the section where the information video data 180 is superimposed.

  FIG. 10 is a functional block diagram showing specific functions of the data processing unit 158. As shown in FIG. 10, the data processing unit 158 includes a line memory 230, an adder 232, a multiplier 234, and a changeover switch 236.

  The line memory 230 temporarily holds the stereoscopic display data 142 in units of lines (horizontal lines), and delays the input data by one line. Therefore, it is possible to refer to the stereoscopic display data 142 one line before the adjacent line.

  The adder 232 includes video-related parameters (for example, the stereoscopic display data 142 of the previous line (first line) held in the line memory 230 and the stereoscopic display data 142 of the second line input at that time (for example, , R, G, B, luminance, color difference, saturation).

  The multiplier 234 multiplies the reciprocal 1/2 to divide the two-line stereoscopic display data 142 added by the adder 232 by the addition number “2”. In this way, it is possible to generate an image obtained by combining the image of the first line and the image of one or more second lines adjacent to the first line.

  The changeover switch 236 processes the stereoscopic display data 142 according to the control signal 182 generated by the control signal generator 156. Referring to FIG. 10, the composite video from the multiplier 234 is directly input to one A of the two input terminals of the changeover switch 236, the stereoscopic display data 142 is directly input to the other B, and the control signal 182 is input to the switch input C. . Accordingly, the changeover switch 236 outputs the stereoscopic display data 142 while the control signal 182 is off, and outputs the stereoscopic display data 142 synthesized for two lines while the control signal 182 is on.

  Since the information video data 180 is often expressed in a single color or several colors, the stereoscopic display data 142 in the section where the information video data 180 is superimposed has a striped pattern due to the difference between the left eye video and the right eye video. Here, the difference between adjacent lines can be smoothed by synthesizing the video of the first line and the video of the second line adjacent to the first line, and the information video in the stereoscopic display data 142 can be smoothed. The continuity of the data 180 can be increased.

  FIG. 11 is an explanatory diagram showing the stereoscopic display data 142 processed by the changeover switch 236. When the composite video for two lines is inserted into the section in which the control signal 182 of FIG. 9B is turned on with respect to the stereoscopic display data 142 shown in FIG. 9A, as shown in FIG. Stereoscopic display data 142 can be obtained. In FIG. 11A, it can be understood that the portion corresponding to the control signal 182 is synthesized and the display color is an intermediate color of two lines. Here, in order to facilitate understanding, the stereoscopic display data 142 is represented by a rough number of lines (12 lines). However, the number of lines originally used depends on the structure of the display 110, the number of scanning lines of stereoscopic video data, and the like. In other words, since the vertical pixel size for each line is small, the information video data 180 is increased by increasing the continuity of the information video data 180 as in the processing example shown in FIG. The contents shown can be easily recognized.

  Here, the changeover switch 236 not only exclusively switches the stereoscopic display data 142 and the composite video for two lines, but also adds the two lines to the stereoscopic display data 142 with an arbitrary transmittance while the control signal 182 is on. The synthesized video may be superimposed. With this configuration, it is possible to prevent the stereoscopic display data 142 as the background from being completely invisible by the information video data 180, and to effectively display both data in a stereoscopic manner.

  Here, the configuration corresponding to the 2-tap (1, 1) / 2 filter calculation has been described as the data processing unit 158. However, the configuration is not limited to this, and for example, the stereoscopic display data 142 of another line is also held. For example, a line memory may be provided and a filter operation of 3 taps (1, 2, 1) / 4 may be performed. Also, only the tap coefficient can be changed with the above-described 2-tap configuration.

  Further, the line memory 230 in the data processing unit 158 can be omitted by sharing the line memory 210 of the control signal generation unit 156.

  FIG. 12 is a functional block diagram showing another connection example of the data processing unit 158. As shown in FIG. Both the control signal generation unit 156 and the data processing unit 158 use the line memory to simultaneously use the data of an arbitrary line in the stereoscopic display data 142 and the data immediately preceding one line (one is the first line and the other is Used as the second line). Therefore, the data processing unit 158 can use the output from the line memory 210 of the control signal generation unit 156 as it is as the input of the adder 232. However, if the signal from the line memory 210 is simply connected to the data processing unit 158, the horizontal synchronizing signal between the stereoscopic display data 142 and the control signal 182 does not match in the data processing unit 158, so that the delay circuit 220, 222 is added to the data processing unit 158 to compensate for the delay caused by the subtractor 212, the absolute value conversion unit 214, the horizontal LPF 216, and the control signal output unit 218.

  Further, the data processing unit 158 does not generate the composite video, and the video of the first line is converted into the first line during the section where the information video data 180 is superimposed, that is, during the period when the control signal 182 is on. You may replace with the image | video of an adjacent 2nd line.

  FIG. 13 is a functional block diagram showing functions of the data processing unit 158. As shown in FIG. 13, the data processing unit 158 includes a line memory 230 and a changeover switch 236. Since the line memory 230 and the changeover switch 236 have already been described with reference to FIG. 10, detailed description thereof will be omitted here, and only differences will be described.

  The changeover switch 236 processes the stereoscopic display data 142 according to the control signal 182 generated by the control signal generator 156. Referring to FIG. 13, the image one line before the stereoscopic display data 142 held in the line memory 230 is directly input to one of the two input terminals A of the changeover switch 236 and the stereoscopic display data 142 is directly input to the other B. A control signal 182 is input to the input C. Therefore, the changeover switch 236 outputs the video of the current line of the stereoscopic display data 142 while the control signal 182 is off, and outputs the video one line before when the control signal 182 is on.

  Since the information video data 180 is often expressed in a single color or several colors, the stereoscopic display data 142 in the section where the information video data 180 is superimposed has a striped pattern due to the difference between the left eye video and the right eye video. Here, the video of both lines can be shared by replacing the video of the first line of interest with the video of the second line adjacent to the first line, and the information in the stereoscopic display data 142 The continuity of the video data 180 can be increased.

  When the data processing unit 158 is configured as shown in FIG. 13, only the odd-numbered line (odd line) or the even-numbered line (even line) is set as the first line. Unlike the above-described video synthesis between lines, if the video replacement between lines is performed on all the lines, the resulting video is simply shifted by one line from the original video. Here, by replacing only one of the odd-numbered lines or even-numbered lines as the first line every other line, the video of either the odd-numbered lines or even-numbered lines is converted to the other Can be shared with the video of the line.

  FIG. 14 is an explanatory diagram showing the stereoscopic display data 142 processed by the changeover switch 236. When the stereoscopic display data 142 shown in FIG. 9A is replaced with the image one line before the section in which the control signal 182 is turned on as shown in FIG. 9B, the stereoscopic display data 142 shown in FIG. Such stereoscopic display data 142 can be obtained. In FIG. 14 (a), unlike FIG. 11 (a), it can be understood that the display color is not changed because the image corresponding to the control signal 182 is simply replaced with the image one line before. Here, as in FIG. 11, the stereoscopic display data 142 is expressed with a rough number of lines (12 lines) for easy understanding, but the number of lines originally used is the structure of the display 110, the number of scanning lines of the stereoscopic video data, and the like. In other words, since the vertical pixel size for each line is small, the continuity of the information video data 180 is increased as in the processing example shown in FIG. The contents indicated by the data 180 can be easily recognized.

  The video output unit 160 outputs the stereoscopic display data 142 processed by the data processing unit 158 to the display 110 or other externally connected device. As described with reference to FIG. 2, the display surface 112 of the display 110 is provided with polarization filters having different polarization characteristics every other line (for each line). Therefore, the stereoscopic display data 142 in which the left eye image and the right eye image are juxtaposed as shown in FIG. 9 can be displayed with appropriate polarization characteristics. By observing the left eye image with the left eye and the right eye image with the right eye, the observer can perceive a sense of depth by wearing dedicated polarizing glasses 118.

  As described above, when the information video data is superimposed only on either the right-eye video or the left-eye video of the stereoscopic video data, the horizontal line between the left-eye video and the right-eye video that are alternately juxtaposed is arranged. A difference is generated. In the above-described stereoscopic video display device 100, when a difference is generated between adjacent lines, it is assumed that the information video data is superimposed there, and a control signal is generated, and the control signal causes the information video data to be superimposed. The displayed section and the stereoscopic display data are processed to enhance the continuity of the information video data. With this configuration, information video data that does not take stereoscopic vision into consideration can be imaged on the surface of the display, the burden on the eyes can be reduced, and more natural stereoscopic video display of stereoscopic video data can be realized.

(3D image display method)
Next, a stereoscopic video display method for displaying stereoscopic video by binocular parallax using the stereoscopic video display device 100 described above will be specifically described.

  FIG. 15 is a flowchart showing the overall flow of the stereoscopic video display method. When the video acquisition unit 150 of the stereoscopic video display device 100 acquires the stereoscopic video data 134 and 140 (YES in S300), the video processing unit 152 performs video processing such as RGB processing (γ correction and color correction), enhancement processing, noise reduction processing, and the like. Signal processing is performed (S302). The line sequential unit 154 alternately displays the horizontal lines of the left eye video and the right eye video in the stereoscopic video data 134 and 140 subjected to the video signal processing in this manner, and displays the stereoscopic display data 142 for display on the display 110. Generate (S304).

  Subsequent to the processing described above, the control signal generation unit 156 compares adjacent lines in the stereoscopic display data 142 to determine whether or not the information video data 180 is superimposed, and the information video data 180 is superimposed. The control signal 182 for identifying the current section is generated (S306), and the data processing unit 158 processes the stereoscopic display data 142 of the section on which the information video data 180 is superimposed based on the control signal 182 (S308). The video output unit 160 outputs the stereoscopic display data 142 on which the information video data 180 is superimposed to the display 110 (S310). Such a series of processing is repeated until the three-dimensional video data 134 and 140 disappear, and the observer can view the three-dimensional video in which the information video data 180 is displayed at an appropriate imaging position.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  Note that each step of the stereoscopic image display method of the present specification does not necessarily have to be processed in time series in the order described in the flowchart, and may include processing in parallel or by a subroutine.

  INDUSTRIAL APPLICABILITY The present invention can be used for a stereoscopic video display device and a stereoscopic video display method capable of displaying stereoscopic video based on binocular parallax on a display.

DESCRIPTION OF SYMBOLS 100 ... Stereoscopic video display apparatus 110 ... Display 130, 136 ... Left eye video 132, 138 ... Right eye video 134, 140 ... Stereoscopic video data 142 ... Stereoscopic display data 150 ... Video acquisition part 152 ... Video processing part 154 ... Line sequential part 156... Control signal generation unit 158... Data processing unit 160... Video output unit 180.

Claims (4)

A video acquisition unit that acquires stereoscopic video data in which left-eye video and right-eye video for realizing stereoscopic viewing by binocular parallax are divided and formed;
A line sequential unit that alternately generates horizontal lines of left-eye video and right-eye video in the stereoscopic video data and generates stereoscopic display data for display on a display;
By comparing adjacent lines in the stereoscopic display data, it is determined whether or not information video data indicating information related to operation display of the stereoscopic display data displayed on the stereoscopic video data or the display is superimposed, A control signal generation unit that generates a control signal that identifies a section in which the information video data is superimposed;
Based on the control signal, the first line video in the section in which the information video data is superimposed and the video of one or more second lines adjacent to the first line are synthesized and newly added. The first line video is generated in the section, or the first line video in the section where the information video data is superimposed is replaced with the second line video adjacent to the first line. A data processing section;
A video output unit for outputting the processed stereoscopic display data;
A stereoscopic video display device comprising: The control signal generation unit is horizontally applied to a difference between evaluation values that are values of one or a plurality of evaluation items selected from R, G, B, luminance, color difference, and saturation between adjacent lines in the stereoscopic display data. A smoothed difference value is calculated by applying a low-pass filtering in a direction, and whether the information video data is superimposed based on whether the smoothed difference value exceeds a predetermined threshold value The stereoscopic image display apparatus according to claim 1, wherein the determination is performed. Wherein the data processing unit, an image of the first line in the section in which the information image data is superimposed, when replacing the video of the second line adjacent to said first line, the odd-numbered lines or even The stereoscopic image display device according to claim 1, wherein only one of the numbered lines is the first line . Obtain stereoscopic video data in which left-eye video and right-eye video for realizing stereoscopic vision with binocular parallax are divided and formed,
The horizontal lines of the left eye video and right eye video in the stereoscopic video data are alternately juxtaposed to generate stereoscopic display data for display on a display,
By comparing adjacent lines in the stereoscopic display data, it is determined whether or not information video data indicating information related to operation display of the stereoscopic display data displayed on the stereoscopic video data or the display is superimposed, Generate a control signal that identifies the section where the information video data is superimposed,
Based on the control signal, the first line video in the section in which the information video data is superimposed and the video of one or more second lines adjacent to the first line are synthesized and newly added. The first line video is generated in the section, or the first line video in the section where the information video data is superimposed is replaced with the second line video adjacent to the first line. processing the three-dimensional display data of the section in which the information image data is superimposed by,
3. A method for displaying a stereoscopic image, wherein the processed stereoscopic display data is output.

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