JP2012105153A - Stereoscopic image display device, stereoscopic image display method, program for allowing computer to execute stereoscopic image display method, and recording medium for storing program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize comfortable stereoscopic view without giving an observer a discomfort or a three dimensional sickness about image position variations in the depth direction when performing a stereoscopic image switching display.SOLUTION: A stereoscopic image generation device which presents a right eye image to a right eye and a left eye image to a left eye comprises; a stereoscopic image data output part for outputting stereoscopic image data composed of the right eye image and the left eye image; and a switching part for switching the stereoscopic image data with a different image from the stereoscopic image data. When the stereoscopic image data output part switches a first stereoscopic image data to a second stereoscopic image data other than the first stereoscopic image data and outputs the switched data as the stereoscopic image data, the switching part switches a display screen before switchover based on the first stereoscopic image data to a display screen after switchover based on the second stereoscopic image data displaying the different image with a discernible length of time therebetween.

Description

  The present invention relates to a device for displaying a stereoscopic image, and more particularly to a display method for continuously switching and displaying a stereoscopic image, a stereoscopic image display program, and a computer-readable recording medium recording the same.

  Humans have the ability to grasp the space from the difference in images obtained by two eyes with a fixed interval. The shift of the corresponding points in the image obtained from different viewpoints by the left and right eyes is called parallax, and the positional relationship of the target is grasped three-dimensionally using parallax as one of the cues. By utilizing this, a means for displaying a right eye image and a left eye image on the right eye is provided, and stereoscopic images can be displayed by presenting parallax images as the right eye image and the left eye image. It is known to be possible. Here, a plurality of images provided with parallax for the purpose of stereoscopic viewing are referred to as stereoscopic images.

  In stereoscopic vision, it is said that humans associate the angle between the optical axes of both eyes according to parallax, that is, the magnitude of convergence with the distance to the object. Therefore, if the right-eye image is shifted to the right and the left-eye image is relatively shifted to the left and the parallax image is shown, the display object can be perceived farther than the actual display surface. Similarly, the display object can be perceived closer to the actual display surface even on the short distance side by applying the opposite parallax to the above. Based on these principles, the right-eye image and the left-eye image are displayed on the right eye and the left eye in a time-sharing manner using, for example, shutter glasses, thereby enabling stereoscopic viewing of the stereoscopic image.

  Conventionally, an image display called a slide show, in which a plurality of images, mainly still images are continuously displayed, has been performed. Many slideshows have been devised to switch images and achieve special effects, which makes the image switching interesting.

  However, when a slide show is performed on a stereoscopic image, if the stereoscopic image is continuously switched, the depth representation of each image is also switched at the same time. As described above, this sense of depth is caused by the parallax of the stereoscopic image. Therefore, if the sense of depth of the image is suddenly changed by switching these images, the user who performs the stereoscopic view feels uncomfortable and continuous. A feeling of fatigue remains by presenting the images while switching the images.

  In order to improve this phenomenon, Patent Document 1 discloses a method of generating an interpolated image that gradually changes the parallax between a stereoscopic image before switching and a stereoscopic image after switching, and smoothly changing the parallax at the time of switching. It is shown.

JP 2009-239389 A

  According to the method of Patent Document 1, it is possible to reduce a sense of discomfort and fatigue due to a sudden change in parallax. However, by displaying an image that interpolates the parallax between the two images, when switching between the two images, an image in which the depth sensation is continuously changed is displayed, and the viewer can see between the images. The display object is perceived as approaching or moving away.

  Especially when the size of the display screen in the observer's field of view is large, or when the observer is observing the screen in a concentrated manner, the observer himself is as if in the depth direction, i.e. For the person, it feels as if it moved in the front-rear direction. If there is a sense of movement that is not accompanied by movement, there is a sense of incongruity as a sense of inconsistency (Sensory Conflict). May cause so-called 3D sickness.

  In order to avoid 3D sickness, there is a method in which image conversion is performed so slowly that humans cannot perceive it. However, the vibration period at which seasickness is likely to occur is generally 6 seconds. Video sickness and motion sickness are not necessarily due to the same mechanism, but if you change the image slowly enough that you can't perceive movement with a period sufficiently longer than this 6-second period, a considerable amount of time is required. turn into. In the method of Patent Document 1 described above, no consideration is given to avoiding this 3D sickness. Further, if the images before and after the switching are greatly different, an appropriate interpolated image cannot be generated.

  The present invention has been made in view of such circumstances, and a stereoscopic image display device that achieves comfortable stereoscopic vision while avoiding discomfort and 3D sickness of an observer associated with switching and displaying a stereoscopic image, A stereoscopic image display method, a program for causing a computer to execute the method, and a recording medium on which the program is recorded are provided.

  According to one aspect of the present invention, a stereoscopic image including a right-eye image and a left-eye image is displayed, and the stereoscopic image can be displayed by presenting the right-eye image to the right eye and the left-eye image to the left eye. A stereoscopic image display device that outputs stereoscopic image data including a right-eye image and a left-eye image, the stereoscopic image data, and the stereoscopic image data. A switching unit that switches between different images, and a display unit that presents the right-eye image and the left-eye image of the stereoscopic image data to the right and left eyes, respectively, and displays a stereoscopic image. The image data output unit switches the first stereoscopic image data to the second stereoscopic image data different from the first stereoscopic image data, and outputs the first stereoscopic image data as the stereoscopic image data. When the switching unit The other image having a perceivable length is displayed between the display screen before switching based on the first stereoscopic image data and the display screen after switching based on the second stereoscopic image data. Thus, a stereoscopic image display device characterized by switching is provided. The another image is an image that covers a part of the image based on the stereoscopic image data. As a result, the image can be switched without a sense of discomfort to the viewer.

  The another image is preferably a uniform image without a pattern. Thereby, it is realizable with simple hardware. The another image is preferably composed of an image having a uniform parallax. Thereby, the convergence angle of the observer during the image conversion can be set to an intended angle. The parallax of the other image takes a value between the parallax of the image before switching based on the first stereoscopic image data and the parallax of the image after switching based on the second stereoscopic image data. Is preferred. Thereby, parallax can be changed smoothly. The another image may be a plurality of images whose parallax is continuously changed. Thereby, the vergence angle of the observer during image conversion can be controlled intentionally.

  In the another image composed of a plurality of images in which the parallax is continuously changed, the part in which the parallax is changed may be a part of the screen. 3D sickness can be avoided because the area where the parallax is changed can be made smaller and there is no need to look there. Of the another image composed of a plurality of images whose parallax is continuously changed, the portion where the parallax is changed is preferably a portion including a characteristic portion of an image based on the stereoscopic image data. . By changing the parallax of the characteristic portion, the parallax can be changed without a sense of incongruity. Similarly, among the other images composed of a plurality of images whose parallax is continuously changed, the portion where the parallax is changed is the position on the screen of the main subject of the image based on the stereoscopic image data Further, it may depend on at least one of the parallax amount.

  The another image including a plurality of images whose parallax is continuously changed is selected so that the parallax is continuously changed from the parallax of the image before the adjustment to the parallax of the image after the adjustment. Also good. Thereby, parallax can be changed smoothly.

  The time for displaying the another image is 0.3 seconds or more. The time for displaying the different image changes depending on at least one of the position on the main subject screen and the amount of parallax of the display screen before switching and the display screen after switching. And Video sickness can be prevented by making it 0.3 seconds or more.

  At least one of the display screen at the time of switching from the display screen before the switching to the other image and the display screen at the time of switching from the other image to the image after the switching is subjected to crossfading processing. Also good. Thereby, it is possible to weaken the stimulation of the image and reduce fatigue.

  At least one of the display screen at the time of switching from the display screen before switching to the other image and the display screen at the time of switching from the other image to the image after switching may be subjected to a wiping process. Thereby, it is possible to weaken the stimulation of the image and reduce fatigue.

  In addition, the present invention displays a stereoscopic image including a right-eye image and a left-eye image, and provides stereoscopic viewing by presenting the right-eye image to the right eye and the left-eye image to the left eye. An image generation apparatus, a stereoscopic image data output unit that outputs stereoscopic image data including a right-eye image and a left-eye image, an image different from the stereoscopic image data and the stereoscopic image data A switching unit that switches between the first stereoscopic image data and the first stereoscopic image data as the stereoscopic image data, wherein the stereoscopic image data output unit is different from the first stereoscopic image data. When switching to the second stereoscopic image data and outputting, the switching unit performs switching based on the display screen before switching based on the first stereoscopic image data and the second stereoscopic image data. Between the subsequent display screen It is switched so as to display the different image length perceivable a stereoscopic image generation apparatus according to claim.

  According to another aspect of the present invention, a stereoscopic image including a right-eye image and a left-eye image is displayed, and stereoscopic viewing is possible by presenting the right-eye image to the right eye and the left-eye image to the left eye. A stereoscopic image adjustment method in the stereoscopic image generation apparatus, wherein the stereoscopic image data output step for outputting stereoscopic image data including a right-eye image and a left-eye image, and the stereoscopic image data, A switching step of switching between an image different from the stereoscopic image data, and in the stereoscopic image data output step, as the stereoscopic image data, the first stereoscopic image data is the first stereoscopic image data. Display before switching based on the first stereoscopic image data in the switching step when switching to and outputting second stereoscopic image data different from the stereoscopic image data of A stereoscopic image adjustment method is provided, wherein switching is performed to display the other image having a perceivable length between a screen and a display screen after switching based on the second stereoscopic image data. The It is preferable to display an image that covers a part of the image based on the stereoscopic image data as the another image.

  The present invention may be a program that causes a computer to execute the above-described stereoscopic image display method, or may be a computer-readable recording medium that records the program.

  ADVANTAGE OF THE INVENTION According to this invention, a comfortable stereoscopic vision can be implement | achieved avoiding an observer's discomfort and 3D sickness accompanying switching and displaying a stereoscopic image.

It is a functional block diagram which shows the example of 1 structure of the stereo image display apparatus by embodiment of this invention. It is a functional block diagram which shows one structural example of the image conversion part by this embodiment. It is the figure which looked at the relationship between parallax and depth display from the top. It is a figure which shows the example of a display screen by this embodiment. It is a flowchart figure which shows the flow of the image conversion process in the stereo image display by the 1st Embodiment of this invention. It is a figure which shows the example of a display in alignment with the image conversion process in the stereo image display by the 1st Embodiment of invention. It is a flowchart figure which shows the flow of the image conversion process in the stereo image display by the 2nd Embodiment of this invention. It is a figure which shows the example of a display in alignment with the image conversion process in the stereo image display by the 2nd Embodiment of invention. It is a functional block diagram which shows the example of 1 structure of the image conversion part by the 3rd Embodiment of this invention. It is a flowchart figure which shows the flow of the image conversion process in the stereo image display by the 3rd Embodiment of this invention. It is a figure which shows the example of a display in alignment with the image conversion process in the stereo image display by the 3rd Embodiment of this invention. It is a figure which shows the example of a display in the stereo image display apparatus by the 4th Embodiment of this invention.

<First Embodiment>
Hereinafter, a stereoscopic image display device according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of the stereoscopic image display apparatus according to the present embodiment. As shown in FIG. 1, a stereoscopic image display apparatus A according to the present embodiment has an input unit 10 that accepts input of image data, and display data that can be stereoscopically displayed by processing the input image data (hereinafter “stereoscopic”). 3D image processing unit 100 that performs image processing to generate “image data for viewing”, an image conversion unit 101 that performs image conversion, and a display control unit 102 that performs display control by matching an image with the display unit. A display unit 103 for displaying an image, a system control unit 104 for controlling the entire system, a user input unit 105 for user input, a glasses synchronization unit 106 for synchronizing shutter glasses, and a shutter worn by the user It is composed of glasses 107.

  FIG. 2 is a diagram illustrating a configuration example of the image conversion unit 101. The image conversion unit 101 constitutes a switching unit that switches between stereoscopic image data and an image different from the stereoscopic image data. As shown in FIG. 2, the image conversion unit 101 includes image conversion processing units 1013 and 1014, a converted image recording unit 1015, and a communication / control unit 1016.

  Next, the operation of each component will be described. In the stereoscopic image display apparatus A, the image data input via the input unit 10 is developed and input into left-eye image data and right-eye image data by the stereoscopic image processing unit 100 according to the input format. If there is additional information in the image data, the additional information is extracted and transmitted to the system control unit 104. Here, the input image data may be anything such as one read electronically from a recording medium, one transmitted from a network, one using broadcast waves, and the like. That is, the input unit 10 may be a semiconductor memory reading device, or may have a communication function with an optical disk or magnetic disk reading device, a radio wave receiver, or a network. In short, any data can be used as long as it can input data that can be interpreted as a stereoscopic image. Further, the right-eye image data and the left-eye image data may be created from a single piece of image data. That is, a multi-viewpoint image synthesized from image data and depth data may be a multi-viewpoint image created by estimating depth information from a two-dimensional image.

  The developed left-eye image data and right-eye image data are sent to the image conversion unit 101 and subjected to image conversion processing. Inside the image conversion unit 101, a communication / control unit 1016 that communicates with the system control unit 104 controls each unit. The converted image recording unit 1015 receives an instruction from the system control unit 104 via the communication / control unit 1016 and outputs another image to be a converted image to the image conversion processing units 1013 and 1014. The image conversion processing units 1013 and 1014 receive an instruction from the system control unit 104 via the communication / control unit 1016 and perform a process of converting an image between the input left and right eye images and the converted image.

  The left-eye image and right-eye image that have undergone the image conversion process are sent to the display control unit 102. The display control unit 102 performs display control in accordance with the display unit 103 and sends a signal to the glasses synchronization unit 106. The glasses synchronization unit 106 sends a synchronization signal to the shutter glasses worn by the user, and synchronization processing with the display unit 103 is performed.

  More specifically, for example, a liquid crystal display panel is used for the display unit 103, a left-eye image and a right-eye image are alternately displayed, and stereoscopic viewing is performed in synchronization with the shutter glasses 107 worn by the observer. The display control unit 102 alternately outputs the left-eye image and the right-eye image to the display unit 103. The output frequency is, for example, 120 images for the left eye and for the right eye, each per second. The display unit 103 displays the image sent from the display control unit 102 as needed. When the left-eye image is displayed on the display unit 103, the left-eye shutter of the shutter glasses 107 is opened and the right-eye shutter is closed. Thus, the left-eye image is displayed on the left eye, and when the right-eye image is displayed, the left-eye shutter is closed and the right-eye shutter is opened to display the right-eye image on the right eye, thereby realizing stereoscopic viewing.

  The observer uses the user input unit 105 to select a stereoscopic image to be displayed and execute display. The user input unit 105 can be realized by, for example, an operation button or a remote control provided in the housing, but can be realized by various means such as a keyboard, a mouse, a touch panel, and a dial. It may be. The input operation data is transmitted to the stereoscopic image processing unit 100 and the image conversion unit 101 via the system control unit 104. The stereoscopic image processing unit 100 develops the selected image and outputs it in accordance with the image conversion timing generated by the system control unit 104. The image conversion unit 101 converts the stereoscopic image and the converted image developed by the stereoscopic image processing unit, and the converted image and the stereoscopic image in accordance with the image conversion timing. The display screen on the display unit 103 during input from the user input unit may be a user interface screen. In this case, a user interface screen may be realized using the display control unit 102 from the system control unit.

Next, the relationship between parallax and depth display is shown in FIG. FIG. 3 is a top view of the viewer and the display. 3 (a) is a conventional two-dimensional display state, at the time of displaying the stereoscopic image, corresponding points of the right eye image and the left eye image is a state in the same position P ₁ on the display (display surface). In this case, the corresponding point P ₁ is perceived to be on display. FIG. 3B shows a state where the corresponding points P ₂ and P ₃ between the right-eye image and the left-eye image are shifted to the right on the display and the left-eye image to the left on the display. In this state, the observer perceives this point behind the display surface (P ₄ ).

FIG. 3C shows a state where the corresponding points P ₅ and P ₆ of the right-eye image and the left-eye image are shifted to the left on the display and the left-eye image to the right on the display. In this state, the observer perceives this point in front of the display surface (P ₇ ).

FIG. 3D is a diagram summarizing these. As described above, when the corresponding point between the right eye image and the left eye image is displayed with the right eye image shifted to the right and the left eye image shifted to the left, and the distance between the corresponding points is equal to the binocular distance, this point is Although it is perceived at infinity, if the distance between corresponding points exceeds the distance between both eyes, the line of sight does not become a divergent direction and cannot be fused. Similarly, when the corresponding points of the right-eye image and the left-eye image on the display are greatly shifted to the left for the right-eye image and to the right for the left-eye image (P ₈ , P ₉ ), the line of sight is extremely crossed. It becomes a state and cannot be fused. Accordingly, the depth range in which stereoscopic viewing can be comfortably performed, that is, the comfortable fusion range shown in FIG. 3D is inside the display surface with respect to the fusion range.

  By applying these principles and moving the left and right eye images relatively to the left and right, the depth of the stereoscopic image can be moved as a whole toward the back or the front.

  Here, an actual operation example of the observer is shown. The observer operates the user input unit 105 to select an image to be displayed. FIG. 4 is a diagram illustrating a display example of the display unit 103 in the stereoscopic image display apparatus A. In the state shown in FIG. 4, the display unit 103 displays a plurality of images 103x, a slide bar S that slides the plurality of images 103x and operates a display area, and operation buttons OB. The “start” button is in the state where the operation cursor is hit. In this state, the user operates the user input unit 105 to move the cursor, selects an image, an operation button OB, or the like, selects an image to be displayed as a slide show, or starts a slide show. The method of selecting images may be a method of individually specifying images, or may be selected collectively. Images may be listed and displayed in units of lists. Further, during image selection, it is preferable to select an image using the display unit 103, but an image selection unit may be provided in addition to that. The selected screen may be a two-dimensional display or a three-dimensional display. When an image is selected, an operation for starting display is performed.

  When image display is started by the above-described operation by the observer, the system control unit 104 instructs the image conversion unit 101 to convert the current display to a converted image and displays the stereoscopic image processing unit 100 on the display. Specify the image to be used. When the image conversion unit 101 receives an instruction from the system control unit 104, the image conversion unit 101 performs processing to convert the displayed user interface screen into a converted image. The stereoscopic image processing unit 100 reads data from the input unit 10 in accordance with the instruction and develops the stereoscopic image. The developed stereoscopic image is output to the image conversion unit 101 in accordance with the timing from the system control unit 104. Similarly, in the image conversion unit 101, the stereoscopic image sent from the stereoscopic image processing unit 100 and the stereoscopic image read from the converted image recording unit 1015 in the image conversion unit 101 are synchronized with the timing from the system control unit 104. Perform the conversion process. At this time, the stereoscopic image processing unit 100 expands / switches the stereoscopic image at a timing when the image conversion processing units 1013 and 1014 select the stereoscopic image read from the converted image recording unit 1015, thereby the stereoscopic image processing unit 100. At the instant of switching the stereoscopic image, the output of the stereoscopic image processing unit 100 can be in a state where it is not displayed on the display unit 103. As a result, the stereoscopic image processing unit 100 does not display the state of image switching to the observer, and it is not necessary to perform quick image switching, so that the hardware configuration can be simplified.

  When receiving an image conversion instruction, the image conversion unit 101 performs image conversion according to the following three steps.

  FIG. 5 is a flowchart showing a flow of image conversion processing according to the present embodiment. FIG. 6 is a diagram illustrating a display example along the flow of processing.

  The process is started (Start: Step S1). As a first step, the left-eye and right-eye image conversion processing units 1013 and 1014 gradually cross fade, that is, gradually reduce the current image display shown in FIG. 5 (step S2 in FIG. 5 and (a) to (b) in FIG. 6), finally, a process of “another image” recorded in the converted image recording unit 1015 is performed (step in FIG. 5). S3, (c) of FIG. This process is sometimes referred to as dissolve. Here, “another image” is preferably an image with little light stimulation, and may be a black screen as an example. In FIG. 6C, a black image is displayed. In general, the process of gradually darkening an image and finally setting it to a black screen is called a fade process or fade-out. Here, these processes are also regarded as a process for converting to a black screen, and are a kind of crossfade. Will be treated as

  It is also possible to re-set the state of adjustment that intentionally represents the angle formed by the optical axis of the eye and the focus and the focus of the eye with “another image”. Prepare it.

  For example, when observing a stereoscopic image with depth, the relationship between convergence and adjustment differs depending on which position on the screen the observer is looking at. More specifically, the adjustment corresponds to the distance from the screen. In this state, the congestion is in the state of perceiving the depth according to the parallax of the object being observed. If the screen is changed in this state, the parallax at the position that was viewed on the screen is changed abruptly. In order to avoid this phenomenon, for example, when an image with an intended parallax is displayed in a small area of a uniform background screen without a pattern, the line of sight is guided by the displayed parallax image, and is set to a convergence corresponding to the image. If the screen is changed to the next screen in this state, the change in the parallax before and after the screen change can be performed via the intended state. By guiding, stereoscopic viewing can be facilitated. As the image, an image that is easy to recognize is preferable.

  Next, as a second step, the image conversion unit 101 performs a process of holding another image display for 0.3 seconds or longer (step S4 in FIG. 5, (c) to (d) in FIG. 6).

  Humans may experience photosensitive seizures (PSS) when subjected to intense light stimuli, such as blinking light. In order to avoid light-sensitive seizures, it is recommended to avoid more than 3 blinks per second, which can be a strong light stimulus. It is generally said that it takes about 0.2 seconds for a human to adjust the focus with respect to an object. Therefore, it is estimated that it takes about the same time to return from the state where the convergence and the adjustment of the focus position do not coincide with each other to the state where the convergence and the adjustment coincide with each other. For these reasons, it is desirable that the duration of the second step be 0.3 seconds or longer.

  As a third step, the image conversion unit 101 crosses the display from “another image” recorded in the conversion image recording unit 1015 to the image after image conversion in the image conversion processing units 1013 and 1014 for the left eye and the right eye. Processing for fading is performed (step S5 in FIG. 5, (d)-(e) in FIG. 6). Next, the image after the image conversion is displayed (step S6 in FIG. 5, (f) in FIG. 6), thereby completing the image conversion process (step S7 in FIG. 5).

  By performing the processing shown in FIGS. 5 and 6, the image conversion unit 101 once resets the state of congestion and adjustment of the observer to an intended state, and further presents the screen after the image conversion to the observer. . In FIG. 6, a uniform black image is used as another image. Since a uniform black screen does not have corresponding points input to the left and right eyes, congestion is considered to return to a natural state.

  By performing these steps, the image conversion unit once resets the state of convergence and adjustment of the observer to an intended state, and further presents the next stereoscopic image to the observer. Thereby, the observer can perform image conversion without feeling a sense of incongruity in which the parallax is suddenly changed or a sense of movement accompanying the parallax being gradually changed. For the above reason, it is better that the other image is an image having a uniform parallax, and it is more preferable that the other image has an intermediate parallax between the pre-adjustment image and the post-adjustment image, for example, the main subject.

  In the first step and the third step, the respective images are converted by the cross-fade process. This is a process for suppressing the movement of the image and reducing the light stimulus. Therefore, this process is not limited to the crossfade process, and the object can be achieved by, for example, a wipe process.

  In addition, although two images, a right-eye image and a left-eye image, are given as stereoscopic images, the number of images is not limited to two, and may be image data for a multi-viewpoint image.

  In addition, a time-division type stereoscopic display unit using shutter glasses is shown as a stereoscopic display system. However, the stereoscopic display system is not limited to the time-division type, and uses a parallax barrier or a lenticular lens. Any type of display system capable of stereoscopic viewing, such as a projector, may be used. As described above, a display for multi-viewpoint images may be used.

  Furthermore, the processing block for inserting another image to be a conversion image is configured as the image conversion processing units 1013 and 1014 in the image conversion unit 101. However, the conversion image insertion process is performed between the image conversion unit and the display unit. It can be executed anywhere. In addition, the hardware configuration is merely an example, and any configuration method may be used. In short, the above-described series of processing may be realized.

<Second Embodiment> Mask Pattern A stereoscopic image display apparatus according to a second embodiment of the present invention will be described below. In the second embodiment, only the content of the image conversion step in the first embodiment is different from the content of the first embodiment. Other hardware configurations and methods of realizing the user interface can be realized by those described in the first embodiment, and detailed description thereof is omitted.

  In the present embodiment, when receiving an instruction to start display, the image conversion unit 101 in FIG. 1 performs image conversion according to the following three steps. FIG. 7 is a flowchart showing the flow of processing in the present embodiment.

  When the process is started (Start: Step S11), as a first step, the image conversion unit 101 displays a mask pattern prepared in advance on the current display (FIG. 7: Step S12, FIG. 8: ( a)-(b)). Here, the mask pattern is an image that blocks a partial area of the image, and in this embodiment, a pattern WP like a window that transmits only a partial area of the image is used. The mask pattern may be translucent, but it is desirable that the mask pattern has a pattern and can guide the line of sight to the pattern itself. By guiding the line of sight to the pattern itself, the vergence of the observer can be changed in accordance with the parallax of the pattern. The display of the mask pattern is preferably performed by moving the mask pattern itself and performing a process of gradually shielding with a cross fade or the like.

  As a second step, the image conversion unit 101 performs a process of displaying the mask pattern for 0.3 seconds or longer (step S13 in FIG. 7 and (c) to (d) in FIG. 8). During this time, the image conversion unit 101 switches the input stereoscopic image before conversion to the converted stereoscopic image in a stepwise manner (step S14 in FIG. 7, (c) to (d) in FIG. 8). That is, a shape in which the input stereoscopic image gradually changes is observed from the transmission area of the mask pattern. The conversion of the input stereoscopic images is preferably performed by crossfading or wiping, but it is preferable to perform processing that softens the light stimulus.

  As a third step, the image conversion unit 101 performs a display process for removing the mask pattern (step S15 in FIG. 7, (e) to (f) in FIG. 8). It is preferable to perform a process of removing the mask pattern gradually by crossfade without moving the mask pattern itself.

  Note that the transmissive region (pattern like a window) WP shown in FIG. 8 is preferably selected not from the background portion of the image but from the image characteristic portion containing the main subject. The position on the screen and the amount of parallax of the transmissive area WP, that is, the portion where the parallax is changed as the display image is changed are at least the position and the amount of parallax of the main subject on the screen based on the stereoscopic image data Depends on one side. That is, as shown in FIG. 8, the roof portion of the house arranged at the center in the image includes the house that is the main subject, and the parallax of this portion is changed as the image changes.

  If the difference in parallax before and after the image change is large, if the main subject part is a window, even if the parallax difference before and after the main subject part change is large, the displayed parallax range is limited, In addition to making it easier to change the convergence, it is possible to familiarize the eyes with the parallax of the main subject in advance, so that the influence of parallax changes before and after image conversion can be mitigated. Further, since an observable region of the image to be converted is a part of the image, the observer feels not to be moving but to observe an object changing from the window. Thereby, an observer can perform image conversion without feeling a sense of incongruity in which images with depth are replaced or a sense of movement. Even if the difference in parallax before and after the main subject is changed, if that part is a window, the change in the parallax of the image seen from the window is small during image conversion, and other images of the image can be processed by crossfade or wipe after conversion. Since this part gradually becomes visible, the observer feels less uncomfortable. In short, the position of the window is selected based on at least one of the position of the main subject on the screen and the amount of parallax so that the change in parallax before and after the image conversion becomes less uncomfortable for the observer, and the image conversion is performed. It is good to.

  Although the transmission area of the mask pattern is a part of the image, the size of the transmission area may be any size as long as the observer does not feel a movement sensation.

<Third Embodiment> The main subject position is detected and the parallax is continuously changed. Hereinafter, a stereoscopic image display apparatus according to a third embodiment of the present invention will be described. In the third embodiment, the configuration of the image conversion unit 101 and the content of image conversion in the first embodiment are different from the content of the first embodiment. Other hardware configurations and user interface implementation methods are the same as in the first embodiment. That is, FIG. 1 shows the entire configuration as in the first embodiment.

  FIG. 9 shows the configuration of the image conversion unit 101. The image conversion unit 101 includes image buffer units 1011 and 1012, image conversion processing units 1013 and 1014, a converted image recording unit 1015, a communication / control unit 1016, and a parallax acquisition unit 1017.

  Next, the operation of each component will be described.

  The image data input to the stereoscopic image display apparatus A via the input unit 10 is developed into left-eye image data and right-eye image data by the stereoscopic image processing unit 100 according to the input format. At the same time, if there is additional information in the input image data, the additional information is extracted and transmitted to the system control unit. Here, the input image data may be anything such as one read electronically from a recording medium, one transmitted from a network, one using broadcast waves, and the like. That is, the input unit 10 may be a semiconductor memory reading device, or may have a communication function with an optical disk or magnetic disk reading device, a radio wave receiver, or a network. In short, any data can be used as long as it can input data that can be interpreted as a stereoscopic image. Further, the right-eye image data and the left-eye image data may be created from a single piece of image data. That is, it may be a multi-viewpoint image synthesized from image data and depth data, or a multi-viewpoint image created by estimating depth information.

  The developed left-eye image data and right-eye image data are sent to the image conversion unit 101. In the image conversion unit 101, a communication / control unit 1016 that communicates with the system control unit 104 controls each unit. In response to an instruction from the system control unit 104 via the communication / control unit 1016, the image buffer units 1011 and 1012 temporarily store the left-eye image data and the right-eye image data input to the image conversion unit 101, respectively. In response to an instruction from the system control unit 104, the instruction is output to the image conversion processing units 1013 and 1014, and an instruction from the system control unit 104 is received and output to the parallax acquisition unit 1017. The parallax acquisition unit 1017 reads data from the image buffer units 1011 and 1012 and calculates the parallax of the left and right images.

  Specifically, the communication / control unit 1016 is obtained in the form of a parallax map in which the amount of deviation between corresponding points of the left and right images is obtained by a technique such as block matching, and the amount of parallax is obtained in association with pixels on the image. To the system control unit 104. The system control unit 104 analyzes the acquired parallax map and acquires the position and parallax of the main subject predicted to be watched by the observer. More specifically, the parallax value obtained from the parallax map is subjected to histogram processing, and the farthest appearance parallax value is regarded as the background image and the closest one as the main subject, and the corresponding main subject is displayed on the screen. Get position and parallax. The acquired position and parallax of the main subject are managed by the system control unit 104, and the position and parallax of the main subject before and after image conversion are transmitted to the converted image recording unit 1015 via the communication / control unit 1016. .

  The converted image recording unit 1015 converts the input stereoscopic image and the converted image, and based on the transmitted position and parallax of the main subject, the same parallax as the main subject at the position on the screen of the main subject before conversion. Display another object you have. Another object or background image to be displayed may be recorded in the converted image recording unit 1015. Another object should be easy to recognize and should not be too large. For example, it is about 1/100 of the screen area. Thereafter, the converted image recording unit moves another object toward the position and parallax of the main subject after conversion. The movement may be linear or curvilinear, but is preferably continuous and not accompanied by intense movement. If the size of another object is too large during the movement, the observer feels a sense of movement, which may cause video sickness.

  The left-eye image and right-eye image that have undergone the image conversion process are sent to the display control unit 102. The display control unit 102 performs display control in accordance with the display unit 103 and simultaneously sends a signal to the glasses synchronization unit 106. The glasses synchronization unit 106 sends a synchronization signal to the shutter glasses worn by the user, and synchronization processing with the display unit is performed. Specifically, for example, when a liquid crystal display panel is used for the display unit 103, a left-eye image and a right-eye image are alternately displayed, and stereoscopic viewing is performed in synchronization with the shutter glasses 107 worn by the observer. The display control unit 102 alternately outputs a left-eye image and a right-eye image to the display unit 103. The output frequency is, for example, 120 images for the left eye and for the right eye, each per second. The display unit 103 displays the image sent from the display control unit 102 as needed. When the left-eye image is displayed on the display unit 103, the left-eye shutter of the shutter glasses 107 is opened and the right-eye shutter is closed. Thus, the left-eye image is displayed on the left eye, and when the right-eye image is displayed, the left-eye shutter is closed and the right-eye shutter is opened to display the right-eye image on the right eye, thereby realizing stereoscopic viewing.

  The observer uses the user input unit 105 to select a stereoscopic image to be displayed and execute display. The user input unit 105 can be realized by, for example, an operation button or a remote controller provided in the housing, but can be realized by various means such as a keyboard, a mouse, a touch panel, and a dial, and can be used for gesture recognition regardless of the format. Also good. The input operation data is transmitted to the stereoscopic image processing unit 100 and the image conversion unit 101 via the system control unit 104. The stereoscopic image processing unit develops the selected image and outputs it in accordance with the image conversion timing generated by the system control unit 104. The image conversion unit 101 converts the stereoscopic image and the converted image developed by the stereoscopic image processing unit, and the converted image and the stereoscopic image in accordance with the image conversion timing. The screen being input from the user input unit may be a user interface screen. In this case, a user interface screen may be realized using the display control unit 102 from the system control unit.

  When receiving an image conversion instruction, the image conversion unit 101 performs image conversion according to the following three steps. FIG. 10 is a flowchart showing the flow of processing in the present embodiment.

  When the process is started (Start: Step S21), as a first step, the current display is cross-faded, that is, gradually darkened in the image conversion processing units 1013 and 1014, and finally the converted image recording unit 1015 is obtained. A process for generating another image is performed (step S22). This process is sometimes referred to as dissolve. Another image is preferably one with less light stimulation. Furthermore, another object is superimposed and displayed on another image (step S23). It is assumed that another object has a parallax and a position on the screen of the main subject before image conversion acquired by the method described above. The size of another object is a part of the screen, for example, 1% or less in terms of area. In FIG. 11, a cross pattern is displayed as another object. Another image has parallax, and may be a parallax amount between the parallax of the background image before and after the image conversion.

  As a second step, the image conversion unit 101 displays another image for 0.3 seconds or longer. Humans may experience photosensitive seizures (PSS) when subjected to intense light stimuli, such as blinking light. In order to avoid light-sensitive seizures, it is recommended to avoid more than 3 blinks per second, which can be a strong light stimulus. It is generally said that it takes about 0.2 seconds for a human to adjust the focus with respect to an object. Therefore, it is estimated that it takes about the same time to return from the state where the convergence and the adjustment of the focus position do not coincide with each other to the state where the convergence and the adjustment coincide with each other. For these reasons, it is desirable that the duration of the second step be 0.3 seconds or longer. During this duration, the image conversion unit 101 changes the position of the main subject (the position of the house) before changing another object (cross pattern) from the parallax and the position of the main subject (the position of the cat) after changing from the parallax as described above. ) And display processing for continuously moving to parallax (steps S23 to S24). The duration of the second step may be extended according to this moving distance. In this case, the moving speed of another object due to the change in the display position and depth of the main subject accompanying the image conversion can be kept below a certain level, and the stimulus to the observer can be reduced.

  As a third step, the image conversion unit 101 causes the image conversion processing units 1013 and 1014 to crossfade the display from another image generated by the conversion image recording unit 1015 to the next stereoscopic image developed by the stereoscopic image processing unit 100. Is performed (step S25). Thereby, the process ends (step S26: end).

  FIG. 11 is a diagram showing a series of flows. In FIG. 11, a cross pattern (shown in white on the screen) is used as another object constituting another image, and a uniform black image is used as a background image. In a series of flows, the main subject (characteristic part: house) is replaced with another object (cross pattern) (b), and the cross pattern is gradually moved to be replaced with the main subject (cat) of the converted image ( e).

  Note that, for another object (cross pattern) shown in FIG. 11, it is preferable to select the position of the characteristic part of the image corresponding to the position of the main subject, not the background part of the image. The part where the parallax is changed depends on at least one of the position on the screen and the amount of parallax of the characteristic part of the main subject of the image based on the stereoscopic image data. That is, as shown in FIG. 11B, the cross pattern corresponding to the roof portion of the house arranged near the center in the image corresponds to the position of the house that is the main subject. The parallax of the cross pattern is also changed with the movement of the cross pattern to the position of the cat accompanying switching to another image. Further, the time for displaying another image is the position and the amount of parallax on the main subject screen of the display screen before switching (FIG. 11A) and the display screen after switching (FIG. 11F). It is good to change depending on at least one of them. That is, when the movement distance of the cross pattern is long, the time for displaying another image is increased so that the movement speed of the cross pattern does not exceed a certain value, for example, 20 cm per second on the display screen. Note that the movement distance of the cross pattern includes not only the plane position on the display screen but also the depth direction, that is, a change in parallax. That is, even if the perceived position when the cross pattern is observed with both eyes is the same on the plane, if the change in depth is accompanied, it takes a longer time to display another image in consideration of the amount of parallax change. Since it is difficult to define the depth distance of the stereoscopic image, the depth of movement is defined as the change in the convergence angle of the observer's eyes when observed from a standard viewing distance (for example, a distance three times the screen height). For example, a direction restriction may be provided.

  By taking these steps, the image conversion unit 101 can set the observer's convergence and adjustment state continuously without difficulty, and can present the next stereoscopic image to the observer. Thereby, the observer can perform image conversion without feeling a sense of incongruity in which the parallax is suddenly changed or a feeling of movement accompanying a gradually changing parallax in a wide range of the visual field. In this case, the parallax of the stereoscopic image is obtained from the left and right images, and there are several known methods for obtaining the parallax, such as block matching.

<Fourth Embodiment> Form Using a Personal Computer (PC) In the fourth embodiment of the present invention, a stereoscopic image processing is performed using a personal computer (PC), and a display device capable of stereoscopic display is used. 3D display. On the PC, a user performs a stereoscopic image process by operating a GUI application using an operation device of the PC, such as a mouse, a keyboard, or a touch panel. That is, a CPU provided in the PC processes a moving image or a still image according to stereoscopic display application software recorded on a storage device, for example, a hard disk or a CD-ROM, and performs stereoscopic display on the stereoscopic display device.

  FIG. 12 is a diagram for explaining a display screen of a stereoscopic display device according to the fourth embodiment of the present invention, and a screen 103 by a stereoscopic image display application is displayed on the stereoscopic display device. The user can perform a slide show based on a stereoscopic image by operating a file selection screen 201 on the GUI, a setting button 203, or the like using an operation device such as a mouse or a keyboard (not shown). Here, the adjustment tab is provided with a screen selection button, a display time button, a switching time, a loop playback button, and the like, and a slide show can be displayed by pressing the start button 205. The present invention can also be applied to information terminals such as mobile phones.

  In the above-described embodiment, the configuration and the like illustrated in the accompanying drawings are not limited to these, and can be changed as appropriate within the scope of the effects of the present invention. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  In addition, a program for realizing the functions described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute processing of each unit. May be performed. The “computer system” here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the above-described functions, or may be a program that can realize the above-described functions in combination with a program already recorded in a computer system.

  The present invention is applicable to a stereoscopic image display device such as a 3D television or a 3D digital photo frame.

DESCRIPTION OF SYMBOLS 10 Input part 100 Three-dimensional image processing part 101 Image conversion part 102 Display control part 103 Display part 104 System control part 105 User input part 106 Glasses synchronization part 107 Shutter glasses 1011 Image buffer part 1012 Image buffer part 1013 Image conversion process part 1014 Image conversion Processing unit 1015 Conversion image recording unit 1016 Communication / control unit

Claims (19)

A stereoscopic image display device that enables stereoscopic viewing by displaying a stereoscopic image including a right-eye image and a left-eye image, and presenting the right-eye image to the right eye and the left-eye image to the left eye. ,
A stereoscopic image data output unit that outputs stereoscopic image data including a right-eye image and a left-eye image;
A switching unit that switches between the stereoscopic image data and an image different from the stereoscopic image data;
A display unit that presents the right-eye image and the left-eye image of the stereoscopic image data to the right eye and the left eye, respectively, and displays a stereoscopic image;
With
The stereoscopic image data output unit switches the first stereoscopic image data to the second stereoscopic image data different from the first stereoscopic image data as the stereoscopic image data. Output from the display unit before the switching based on the first stereoscopic image data and the display screen after the switching based on the second stereoscopic image data. A stereoscopic image display device that switches to display the another image having a possible length.   The stereoscopic image display apparatus according to claim 1, wherein the another image is an image that partially covers an image based on the stereoscopic image data.   The stereoscopic image display device according to claim 1, wherein the another image is a uniform image without a pattern.   The stereoscopic image display apparatus according to claim 1, wherein the another image is configured by an image having a uniform parallax.   The parallax of the other image is a value between the parallax of the image before switching based on the first stereoscopic image data and the parallax of the image after switching based on the second stereoscopic image data. The stereoscopic image display device according to claim 4, wherein:   The stereoscopic image display device according to claim 1, wherein the another image is a plurality of images whose parallax is continuously changed.   The stereoscopic image display device according to claim 6, wherein in another image including a plurality of images in which the parallax is continuously changed, a portion in which the parallax is changed is a part of a screen.   Of the another image composed of a plurality of images whose parallax is continuously changed, a portion where the parallax is changed includes a characteristic portion of an image based on the stereoscopic image data. The stereoscopic image display apparatus according to claim 7.   Of the another image composed of a plurality of images whose parallax is continuously changed, the portion where the parallax is changed is the position on the screen and the amount of parallax of the main subject of the image based on the stereoscopic image data The stereoscopic image display device according to claim 7, wherein the stereoscopic image display device depends on at least one of the two.   The another image composed of a plurality of images whose parallax is continuously changed is selected so that the parallax is continuously changed from the parallax of the image before switching to the parallax of the image after switching. The stereoscopic image display device according to any one of claims 6 to 8, wherein   The stereoscopic image display device according to any one of claims 1 to 10, wherein a time for displaying the another image is 0.3 seconds or more.   The time for displaying the different image changes depending on at least one of the position on the main subject screen and the amount of parallax of the display screen before switching and the display screen after switching. The stereoscopic image display device according to any one of claims 1 to 10.   A crossfade process is performed on at least one of the display screen at the time of switching from the display screen before the switching to the other image and the switching from the other image to the image after the switching. The three-dimensional image display device according to any one of claims 1 to 12.   A wipe process is performed on at least one of the display screen at the time of conversion from the display screen before the switching to the other image and the display screen at the time of conversion from the other image to the image after the switching. The three-dimensional image display device according to any one of claims 1 to 12. A stereoscopic image generation apparatus that enables stereoscopic viewing by displaying a stereoscopic image including a right-eye image and a left-eye image, and presenting the right-eye image to the right eye and the left-eye image to the left eye. ,
A stereoscopic image data output unit that outputs stereoscopic image data including a right-eye image and a left-eye image;
A switching unit that switches between the stereoscopic image data and the image different from the stereoscopic image data,
The stereoscopic image data output unit switches the first stereoscopic image data to the second stereoscopic image data different from the first stereoscopic image data as the stereoscopic image data. Output from the display unit before the switching based on the first stereoscopic image data and the display screen after the switching based on the second stereoscopic image data. A stereoscopic image generating apparatus, wherein the switching is performed so as to display the another image having a possible length. A stereoscopic image in a stereoscopic image generating apparatus that displays a stereoscopic image including a right-eye image and a left-eye image, and enables stereoscopic viewing by presenting the right-eye image to the right eye and the left-eye image to the left eye An adjustment method,
Stereoscopic image data output step for outputting stereoscopic image data composed of a right-eye image and a left-eye image;
A switching step of switching between the stereoscopic image data and an image different from the stereoscopic image data;
Including
In the stereoscopic image data output step, as the stereoscopic image data, the first stereoscopic image data is switched to second stereoscopic image data different from the first stereoscopic image data. Output in the switching step between the display screen before switching based on the first stereoscopic image data and the display screen after switching based on the second stereoscopic image data. A method for adjusting a stereoscopic image, wherein the switching is performed so that the other image having a possible length is displayed.   The stereoscopic image adjustment method according to claim 16, wherein an image that covers a part of the image based on the stereoscopic image data is displayed as the another image.   A program for causing a computer to execute the stereoscopic image adjustment method according to claim 16 or 17.   A content-readable recording medium storing the program according to claim 18.

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