JP4889820B2 - Stereoscopic image display apparatus and stereoscopic image display method - Google Patents

Description

  The present invention relates to a stereoscopic image display apparatus and a display method thereof, and particularly, when a display is switched from a state where a stereoscopic image having a predetermined parallax is displayed to a stereoscopic image having a different parallax, the user feels fatigue and discomfort. The present invention relates to a stereoscopic image display apparatus and a stereoscopic image display method for reducing the number of stereoscopic images.

  There is known a stereoscopic image display device that allows a user to stereoscopically view an image having binocular parallax by separating and inputting the left and right eyes of the user. When stereoscopic viewing is performed using such a display device, the user may feel eye fatigue.

  Patent Document 1 describes a technique for reducing the parallax of a stereoscopic image when the stereoscopic image display time exceeds a predetermined time. According to this technique, it is possible to protect the eyes of the observer by adjusting the parallax of the stereoscopic image displayed according to the fatigue of the eyes of the observer.

JP 2008-306739 A

  However, even when the technique of Patent Document 1 is used, when a stereoscopic image is frame-advanced, the display is suddenly switched to a different parallax image, so the user must adjust the parallax instantaneously according to that and discomfort There is a problem that fatigue and loss of stereoscopic effect are caused. This problem becomes more prominent when frame advance is performed at high speed.

  The present invention has been made in view of such circumstances, and reduces fatigue and discomfort that a user feels when switching a display from a state in which a stereoscopic image having a predetermined parallax is displayed to a stereoscopic image having a different parallax. An object of the present invention is to provide a stereoscopic image display device and a stereoscopic image display method.

  In order to achieve the above object, a stereoscopic image display apparatus according to the present invention is a stereoscopic image display apparatus that displays a stereoscopic image having parallax on a display unit, and displays a stereoscopic image of a current frame being displayed according to a frame advance instruction. In a stereoscopic image display apparatus that advances a frame to the next frame of a stereoscopic image, when frame advance is instructed, the display of the stereoscopic image of the current frame is switched to the display of an image without parallax of the current frame, and then the next frame is advanced by frame advance. The image display apparatus further comprises a frame advance means for displaying an image without a parallax of the frame, and then displaying the stereoscopic image of the next frame on the display means, and the frame advance means performs frame advance by slide-out / slide-in. And

  According to the present invention, when the frame advance is instructed, the stereoscopic image of the next frame is displayed on the display means after the image without parallax is displayed, so that the stereoscopic image having a predetermined parallax is displayed. When the display is switched from a state to a stereoscopic image having a different parallax, fatigue and discomfort felt by the user can be reduced.

  A stereoscopic image processing unit configured to generate an image without the parallax from a stereoscopic image having a predetermined parallax, wherein the stereoscopic image processing unit generates an image without the parallax of the next frame while the stereoscopic image of the current frame is being displayed; It is preferable to do.

  The stereoscopic image processing means preferably generates an image without parallax of the current frame while displaying the stereoscopic image of the current frame.

  The frame sending means displays a stereoscopic image with reduced parallax of the current frame between the display of the stereoscopic image of the current frame and the display of the image without parallax of the current frame, and the parallax of the next frame. A stereoscopic image in which the parallax of the next frame is reduced may be displayed between the display of no image and the stereoscopic image of the next frame.

  Thereby, fatigue and discomfort felt by the user can be reduced, and natural frame advance can be performed.

  The frame advancement unit has a large parallax between the display of the stereoscopic image of the current frame and the display of the current frame without parallax. A plurality of stereoscopic images in which the parallax of the stereoscopic image of the next frame is reduced are displayed in order of increasing parallax between the display of the image without parallax of the next frame and the display of the stereoscopic image of the next frame. May be.

  Thereby, fatigue and discomfort felt by the user can be reduced, and natural frame advance can be performed.

  High-speed frame advance means for performing frame advance in a shorter time than frame advance by the frame advance means. When a frame advance is instructed, a slide-out / slide-in operation is performed using only an image without parallax without displaying a stereoscopic image. Based on the determination result of the high-speed frame advance means for performing the frame advance by, the determination means for determining which of the frame advance instruction and the high-speed frame advance means the frame advance instruction, It is preferable to include a control unit that controls the frame feeding unit and the high-speed frame feeding unit.

  As a result, it is possible to prevent the parallax from switching at a high speed and placing a burden on the eyes.

  At the time of frame advancement by the high-speed frame advancement unit, a display that the image that is the basis of the image without parallax is a stereoscopic image may be performed.

  As a result, it is possible to determine whether the displayed image is a stereoscopic image or a planar image.

  In order to achieve the above object, a stereoscopic image display method according to the present invention is a stereoscopic image display method for displaying a stereoscopic image having parallax on a display means, and a stereoscopic image of a current frame being displayed according to a frame advance instruction. In the stereoscopic image display method of frame-advancing the next frame to the next-frame stereoscopic image, when frame advance is instructed, the stereoscopic image display of the current frame is switched to the display of the current frame without parallax, and then slide-out / slide An image without parallax of the next frame is displayed by frame advance by IN, and then a stereoscopic image of the next frame is displayed on the display means.

  According to the present invention, when the frame advance is instructed, the stereoscopic image of the next frame is displayed on the display means after the image without parallax is displayed. It is possible to reduce fatigue and discomfort that the user feels when switching the display from the existing state to a stereoscopic image with a different parallax.

FIG. 1 is a front view of a stereoscopic image display apparatus 1 according to the present invention. FIG. 2 is a diagram illustrating an example of an electrical configuration of the stereoscopic image display apparatus 1. FIG. 3 is a diagram illustrating frame advance of a stereoscopic image displayed on the stereoscopic image display device 14. FIG. 4 is a diagram illustrating frame advance of a stereoscopic image displayed on the stereoscopic image display device 14. FIG. 5 is a diagram illustrating frame advance of a stereoscopic image displayed on the stereoscopic image display device 14. FIG. 6 is a diagram illustrating a change in parallax of the stereoscopic images 101 and 103. FIG. 7 is a flowchart showing frame advance according to the second embodiment. FIG. 8 is a diagram showing a change in parallax during normal frame advance and a change in parallax during high speed frame advance. FIG. 9 is a flowchart illustrating frame advance according to the third embodiment. FIG. 10 is a diagram illustrating frame advance of a stereoscopic image displayed on the stereoscopic image display device 14. FIG. 11 is a diagram illustrating frame advance of a stereoscopic image displayed on the stereoscopic image display device 14. FIG. 12 is a diagram illustrating frame advance of a stereoscopic image displayed on the stereoscopic image display device 14. FIG. 13 is a diagram illustrating a change in parallax of the stereoscopic images 101 and 103. FIG. 14 is a diagram illustrating a change in parallax of the stereoscopic images 101 and 103.

  The best mode for carrying out the present invention will be described below.

<First Embodiment>
FIG. 1 is a front view of a stereoscopic image display apparatus 1 according to the present invention. As shown in the figure, the housing of the stereoscopic image display device 1 is formed in a substantially rectangular parallelepiped box shape, and a stereoscopic image display device 14 and an operation unit 26 are provided on the front surface thereof.

  Although not shown in detail in the figure, the operation unit 26 includes a recording / playback mode selection switch 26a, a recording button 26c, a power button 26d, a zoom button 26e, a menu button 26f, a menu selection cross key 26g, and the like. The user controls the stereoscopic image display device 1 in accordance with each operation.

  The stereoscopic image display device 14 is a lenticular lens type 3D monitor capable of stereoscopically displaying stereoscopic image data. The stereoscopic image display device 14 displays various menu screens when setting the operation mode, zoom, and the like, and displays a GUI screen on which setting items can be set according to the operation of the operation unit 26.

  FIG. 2 is a diagram illustrating an example of an electrical configuration of the stereoscopic image display apparatus 1. As shown in the figure, the stereoscopic image display apparatus 1 includes an image signal processing unit 10, a stereoscopic image signal processing unit 11, a compression processing unit 12, a video encoder 13, in addition to the stereoscopic image display device 14 and the operation unit 26 described above. The bus 15, CPU 16, sound input processing unit 17, stereo microphone amplifier unit 18, microphone 19, memory 20, ROM 21, media recording control unit 22, recording medium 23, etc.

  Each unit operates under the control of the CPU 16, and the CPU 16 controls each unit of the stereoscopic image display device 1 by executing a predetermined control program based on an input from the operation unit 26.

  In addition to the control program executed by the CPU 16, various data necessary for control are recorded in the ROM 21. The CPU 16 controls each unit of the stereoscopic image display device 1 by reading the control program recorded in the ROM 21 into the memory 20 and sequentially executing the program.

  The video encoder 13 controls the display of the image data input via the bus 15 on the stereoscopic image display device 14 in accordance with a command from the CPU 16.

  The stereo microphone amplifier unit 18 amplifies the audio signal input from the microphone 19 and inputs the amplified audio signal to the sound input processing unit 17. The sound input processing unit 17 converts the sound input input from the stereo microphone amplifier unit 18 into a digital signal of a predetermined format in accordance with a command from the CPU 16.

  The recording medium 23 is a detachable recording medium such as a semiconductor memory card, a portable small hard disk, a magnetic disk, an optical disk, or a magneto-optical disk. The media recording control unit 22 receives image data compressed by the compression processing unit 12 and audio data converted into a digital signal by the sound input processing unit 17 via the bus 15, and the media recording control unit 22. Records these signals on the recording medium 23.

  The sound output device 24 generates sound from the speaker 25 based on the sound signal input via the bus 15.

  The power supply unit 27 generates various DC voltages from an AC power source (not shown) and supplies power to each unit of the stereoscopic image display device 1. Various DC voltages may be generated not from an AC power source but from a battery built in the stereoscopic image display device 1.

  Next, the frame advance of the stereoscopic image of the stereoscopic image display device 1 will be described. FIG. 3A is a diagram illustrating a state in which the stereoscopic image 101 having a predetermined parallax is displayed on the stereoscopic image display device 14. The stereoscopic image 101 is an image recorded on the recording medium 23. In this state, the user can view the stereoscopic image 101 stereoscopically.

  Here, the stereoscopic image display apparatus 1 performs frame-by-frame display from the currently displayed stereoscopic image 101 to the stereoscopic image 103 having a predetermined parallax to be displayed next when the user operates the operation unit 26. Can be made. The order of display is configured so that the user can freely determine in advance.

  Note that frame advance includes not only sequential display in a predetermined display order but also switching display to an arbitrary frame specified by the user during display of the current frame. You may comprise.

  When the operation unit 26 is operated to instruct the frame advance of the stereoscopic image, the CPU 16 sends an image without parallax from the stereoscopic image 101 currently displaying the display of the stereoscopic image display device 14 via the video encoder 13. The display is switched to 102. The image 102 having no parallax is stored in the ROM 21 in advance. FIG. 3B is a diagram illustrating a state in which the image 102 without parallax is displayed on the stereoscopic image display device 14. Here, a white image as a whole is used as the image 102 without parallax, but any image may be used. The user can visually recognize this image while the image 102 without parallax is displayed, and can switch the eye accustomed to the parallax of the stereoscopic image 101 to a state without parallax.

  The CPU 16 reads the stereoscopic image 103 to be displayed next from the recording medium 23 via the media recording control unit 22, and after a predetermined time has elapsed since the display of the image 102 without parallax was started, The display is switched from the image 102 without parallax to the display of the stereoscopic image 103 to be displayed next. FIG. 3C is a diagram illustrating a state in which the stereoscopic image 103 having a predetermined parallax is displayed on the stereoscopic image display device 14. In this state, the user can view the stereoscopic image 103 stereoscopically.

  Thus, when switching the display from the state in which the stereoscopic image 101 having a predetermined parallax is displayed to the stereoscopic image 103 having a different parallax, by displaying the image 102 without the parallax in the meantime, the user can Since it is possible to switch the vision from the parallax of the stereoscopic image 101 to a flat state where there is no parallax, fatigue of the eyes of the user due to the stereoscopic vision can be reduced.

  In the present embodiment, the frame operation of the stereoscopic image is performed by the user operating the operation unit 26. However, the present invention can also be applied to a slide show in which frame advancement is performed every predetermined time. It may be configured so that the user can select whether or not to display the image 102 without parallax during frame advance.

  Further, the image without parallax displayed between the frame advancements may be an image without the parallax of the image to be stereoscopically viewed.

  For example, as shown in FIG. 4A, when the user performs a frame advance operation in a state in which the stereoscopic image 101 is displayed on the stereoscopic image display device 14 as shown in FIG. The displayed stereoscopic image 101 may be switched to the display of the image 101a without the parallax of the stereoscopic image 101. The image 101 a in which the parallax of the stereoscopic image 101 is eliminated is generated based on the left-eye image and the right-eye image of the stereoscopic image 101 while the stereoscopic image 101 is displayed.

  Next, as illustrated in FIGS. 4C and 4D, the stereoscopic image display device 1 switches the display from the image 101 a with no parallax to the image 103 a with no parallax. The image 103a without the parallax is an image in which the parallax of the stereoscopic image 103 to be displayed next is eliminated. Similarly to the image 101a without the parallax, the left-eye image of the stereoscopic image 103 is displayed during the display of the stereoscopic image 101. And the image for the right eye. The switching from the image 101a to the image 103a is performed using slide-out and slide-in in the drawing, but fade-out / fade-in, overlap, wipe, and the like may be used.

  After the display of the image 103a with no parallax, the display is switched to the display of the stereoscopic image 103 to be displayed next, as shown in FIG. In this state, the user can stereoscopically view the stereoscopic image 103.

  The time required for this frame advance is 0.3 seconds for the display time of the image 101a with no parallax shown in FIG. 4B, 0.4 seconds for the frame switching shown in FIG. 4C, and FIG. It is preferable that the display time of the image 103a without the parallax shown in d) is 0.3 seconds, and the time required to send one frame as a whole is about 1 second. By performing frame advance in this way, fatigue of the user's eyes due to stereoscopic viewing can be reduced, and smooth frame advance can be realized. Note that the time required for frame advance is not limited to this example, and may be determined as appropriate. You may change according to parallax, and you may comprise so that a user can set freely.

  Note that the image displayed between frames is not an image in which the parallax of an image for stereoscopic viewing is eliminated, but an image in which the parallax of an image for stereoscopic viewing is reduced to a parallax that does not burden the user's eyes. Also good. For example, an image in which the parallax of the stereoscopic image 101 is reduced is generated based on the left-eye image and the right-eye image of the stereoscopic image 101 while the stereoscopic image 101 is displayed. When the user performs a frame advance operation, the stereoscopic image 101 currently displayed is switched to display an image with reduced parallax of the stereoscopic image 101.

  Similarly, an image with reduced parallax of the stereoscopic image 103 is generated, and the display is switched from an image with reduced parallax of the stereoscopic image 101 to an image with reduced parallax of the stereoscopic image 103.

  In this way, it is possible to reduce fatigue of the user's eyes due to stereoscopic viewing even by frame-by-frame feeding using an image that has been reduced to a parallax that does not impose a burden on the user's eyes instead of an image in which the parallax is completely eliminated. And smooth frame-by-frame advance can be realized.

  Furthermore, the stereoscopic image that is frame-by-frame may be displayed so that the parallax gradually changes.

  For example, in the state where the stereoscopic image 101 shown in FIG. 5A is displayed, when the user performs a frame advance operation, until the image 101a without the parallax shown in FIG. 5C is displayed, As shown in FIG. 5B, a plurality of stereoscopic images 101b in which the parallax is gradually reduced from the stereoscopic image 101 are displayed. The plurality of stereoscopic images 101b in which the parallax of the stereoscopic image 101 is gradually reduced are extracted in the stereoscopic image signal processing unit 11 by extracting corresponding points based on the left-eye image and the right-eye image of the stereoscopic image 101. Based on the point, the parallax is generated by making the parallax slightly different until the parallax disappears from the parallax of the stereoscopic image 101. Furthermore, by sequentially displaying these three-dimensional images 101b having different parallaxes every minute time, the parallaxes are displayed so that the parallax gradually decreases like a moving image.

  The change in parallax in this case will be described with reference to FIG. FIG. 6 is a diagram illustrating changes in the parallax of the stereoscopic images 101 and 103, where the horizontal axis represents time and the vertical axis represents the parallax of the display image. As shown in the figure, when the frame advance is instructed, the parallax gradually changes from the stereoscopic image 101 having a predetermined parallax to the image 101a without the parallax between time t0 and time t1. Display is performed. Although the parallax is changed exponentially in the figure, it may be displayed so that the parallax is changed linearly. The period from time t0 to time t1 is preferably about 0.3 seconds.

  Thereafter, as in FIG. 4, as shown in FIG. 5D, the display is switched from the image 101a with no parallax to the image 103a with no parallax. This period corresponds to time t1 to time t2 in FIG. As described above, this period is preferably about 0.4 seconds.

Further, as shown in FIG. 5 (f), the parallax was gradually added during the period from the image 103a with no parallax shown in FIG. 5 (e) to the display of the stereoscopic image 103 shown in FIG. 5 (g). A plurality of stereoscopic images 103b are displayed. The plurality of stereoscopic images 103b to which the parallax is gradually added are also generated in the stereoscopic image signal processing unit 11 by changing the parallax of the stereoscopic image 103 from the left-eye image and the right-eye image of the stereoscopic image 103. Furthermore, by displaying these multiple images in order of increasing parallax, the parallax is gradually increased.
Thereafter, the stereoscopic image 103 is displayed. In this state, the user can stereoscopically view the stereoscopic image 103.

  As shown in FIG. 6, the parallax is changed exponentially with respect to the change in parallax, but may be displayed so as to change parallax linearly. The period from time t2 to time t3 is preferably about 0.3 seconds.

  In this way, when frame advance is instructed in a state where a stereoscopic image is displayed, the parallax of the displayed stereoscopic image is gradually reduced until the parallax disappears. Switch to the top. When the next frame is a three-dimensional image, an image without the parallax of the next frame is displayed, and the parallax is gradually added until the original parallax is obtained. By performing frame advance in this way, the user can switch the vision to a flat state without parallax without a sense of incongruity, and can reduce eye fatigue due to stereoscopic vision.

  Note that, when an image with reduced parallax of the stereoscopic image 101 is used instead of the image 101a without parallax shown in FIG. 5C, a plurality of parallaxes with gradually reduced parallax shown in FIG. The parallax of the stereoscopic image 101b may be changed from the parallax of the stereoscopic image 101 to the parallax of an image with reduced parallax. Even when an image with reduced parallax of the stereoscopic image 103 is used instead of the image 103a with no parallax shown in FIG. 5 (e), a plurality of stereoscopic images 103b with gradually added parallax shown in FIG. The parallax may be changed from the parallax of the image with reduced parallax to the parallax of the stereoscopic image 103.

  Even if frame advance is performed in this way, it is possible to reduce eye fatigue due to stereoscopic viewing of the user.

<Second Embodiment>
FIG. 7 is a flowchart showing frame advance according to the second embodiment. In the second embodiment, the stereoscopic image display apparatus 1 includes two types of frame advance, normal speed frame advance and high speed frame advance. Normal frame-by-frame is a frame-by-frame display according to user instructions. High-speed frame-by-frame displays a single image so that many images can be framed in a short time. Shorten the time and perform frame advance sequentially. Here, it is assumed that the normal speed frame advance takes about 1 second to send one frame, and the high speed frame advance takes about 0.3 seconds to send one frame.

  The normal speed frame advance and the high speed frame advance may be assigned different operation members of the operation unit 26. When the same operation member (operation button) is turned on for a short time, the normal speed frame advance is turned on for a long time. In such a case, it may be sorted like high-speed frame advance.

  Similarly to the first embodiment, when the stereoscopic image 101 having a predetermined parallax is displayed on the stereoscopic image display device 14 (step S1), the user performs a frame advance operation by the operation unit 26 (step S2). ), The CPU 16 determines whether or not the user's frame advance operation is a high-speed frame advance operation (step S3).

  If it is not high-speed frame advance, normal-speed frame advance is performed (step S4). Normal speed frame advance is the same frame advance as in FIG. 5 of the first embodiment. That is, from the state in which the stereoscopic image 101 is displayed, a plurality of stereoscopic images 101b in which the parallax is gradually reduced from the stereoscopic image 101 are displayed, and the image 101a in which the parallax is eliminated is displayed. Thereafter, the display is switched to the image 103a in which the parallax of the stereoscopic image 103 to be displayed next is eliminated, and a plurality of stereoscopic images 103b to which the parallax is gradually added are displayed, and finally the stereoscopic image 103 to be displayed next is displayed. (Step S6). Here, the display time of the plurality of stereoscopic images 101b is 0.3 seconds, the switching from the image 101a without the parallax to the image 103a without the parallax is 0.4 seconds, and the display time of the plurality of stereoscopic images 103b is 0. By setting it to 3 seconds, the time required to send one frame is about 1 second.

  If it is determined in step S3 that high-speed frame advance is made, high-speed frame advance is performed (step S5). With respect to the high-speed frame advance, the displayed image is the same as that in FIG. 5 of the first embodiment, but the display time is different from the normal-speed frame advance. FIG. 8 shows changes in parallax during normal frame advance and changes in parallax during high-speed frame advance. A solid line indicates a change in parallax during normal speed frame advance, which is similar to the change in parallax illustrated in FIG. 6. A dotted line indicates a change in parallax at the time of high-speed frame advance. Times t10 to t11 are display times of a plurality of stereoscopic images 101b, and t11 to t12 are an image 101a from which parallax is eliminated and an image 103a from which parallax is eliminated The switching time, the time t12 to t13, is the display time for the plurality of stereoscopic images 103b, and the time required to send one frame is about 0.3 seconds by setting each time to 0.1 seconds.

  In order to make the display time of the plurality of stereoscopic images 101b and the plurality of stereoscopic images 103b shorter than that at the time of normal-speed frame advance, the number of images of the plurality of stereoscopic images is reduced and the display time per sheet is reduced to the normal-speed frame. The number of stereoscopic images may be the same as that of normal-speed frame advance, and the display time per sheet may be shortened.

  By performing the display in this way, the user can switch the vision to a flat state with no parallax while realizing the instructed frame advance speed, and can reduce eye fatigue due to stereoscopic vision.

<Third Embodiment>
FIG. 9 is a flowchart illustrating frame advance according to the third embodiment. In the third embodiment, the stereoscopic image display device 1 is provided with three types of frame advance, normal speed frame advance, medium speed frame advance, and high speed frame advance. The normal speed frame advance is the same as the normal speed frame advance of the second embodiment, and the medium speed frame advance is the same as the high speed frame advance of the second embodiment. In addition, the high-speed frame advance in the third embodiment is for sending more images in a shorter time than the medium-speed frame advance, and the time required for sending one frame is about 0.2 seconds. It has become.

  These frame feeds may be assigned to different operation members of the operation unit 26, or may be distributed according to the time when the same operation member (operation button) is turned on.

  Similarly to the second embodiment, when the stereoscopic image 101 having a predetermined parallax is displayed on the stereoscopic image display device 14 (step S1), the user performs a frame advance operation using the operation unit 26 (step S2). ) CPU 16 determines the instructed frame feed speed (step S11).

  If the instructed frame advance speed is normal speed frame advance (step S12), frame advance similar to the normal speed frame advance of the second embodiment is performed. If the instructed frame advance speed is medium-speed frame advance (step S14), frame advance similar to the high-speed frame advance of the second embodiment is performed (step S15). A detailed description of the frame advance will be omitted.

  If the instructed frame advance speed is high-speed frame advance (step S16), frame advance is performed using only the image with no parallax (step S17).

  FIG. 10 is a diagram showing the display of the stereoscopic image display device 14, and is a diagram showing the high-speed frame advance in step S17. In the high-speed frame advance, when the frame advance is performed in the order of the stereoscopic images 101, 103, and 105, only the images 101a, 103a, and 105a in which the parallax of these stereoscopic images is eliminated are displayed and the frame advance is performed.

  When the user instructs high-speed frame advancement while the stereoscopic image 101 is displayed, after displaying a plurality of stereoscopic images 101b in which the parallax is gradually reduced from the stereoscopic image 101, the parallax is displayed. The lost image 101a is displayed. This state is shown in FIG. The time for this display is 0.1 seconds.

  Next, as shown in FIG. 10B, the image 101a is switched to the image 103a from which the parallax of the stereoscopic image 103 to be displayed next is eliminated by slide-out / slide-in. This switching time is also 0.1 seconds. As before, other effects may be used for the image switching effect.

  Further, an image 103a is displayed as shown in FIG. The display time is also 0.1 seconds.

  Subsequently, when high-speed frame advance is instructed, as shown in FIG. 10D, an image 105a in which the parallax of the stereoscopic image 105 to be displayed next is eliminated from the image 103a by slide-out / slide-in. Switch to. Further, an image 105a is displayed as shown in FIG.

  In this way, when performing high-speed frame advance, it is considered that the user is searching for an image for stereoscopic viewing. Therefore, the frame advance speed is prioritized without stereoscopically displaying the image being frame-advanced. By displaying in this way, it is possible to prevent the user from placing a burden on the eyes by stereoscopically viewing a group of images that are switched at high parallax.

  In the high-speed frame advance shown in FIG. 10, the user cannot distinguish whether the image being frame-acquired is originally a stereoscopic image or originally a flat image. Therefore, as shown in FIG. 11, the stereoscopic image icon 107 may be displayed together with the image without the parallax so that the displayed image is originally a stereoscopic image. By displaying the stereoscopic image icon 107 at the same time, the user can know that the image displayed during the high-speed frame advance is originally a stereoscopic image even if the image is not a stereoscopic image.

<Fourth embodiment>
In the first to third embodiments, when a frame advance is performed from a stereoscopic image having a predetermined parallax to a stereoscopic image having a different parallax, an image having no parallax is displayed once, but the currently displayed stereoscopic image May be changed to the parallax of the image to be displayed next.

  FIG. 12 is a diagram illustrating the display of the stereoscopic image display device 14 when frame-by-frame transfer from the stereoscopic image 101 to the stereoscopic image 103 is performed.

  In the state where the stereoscopic image 101 is displayed on the stereoscopic image display device 14 as shown in FIG. 12A, when the user performs a frame advance operation, the stereoscopic image 103 to be displayed next is displayed. As shown in FIG. 12B, a plurality of stereoscopic images 101c in which the parallax from the stereoscopic image 101 is gradually brought close to the parallax of the stereoscopic image 103 are displayed. A plurality of stereoscopic images 101c in which the parallax of the stereoscopic image 101 is gradually brought close to the parallax of the stereoscopic image 103, the parallax of the stereoscopic image 103 to be displayed next is acquired in advance by the CPU 16, and the stereoscopic image signal processing unit 11 Corresponding point extraction is performed based on the left-eye image and right-eye image of the image 101, and the parallax of the stereoscopic image 101 from the parallax of the stereoscopic image 101 to the parallax of the stereoscopic image 103 to be displayed next is based on the extracted corresponding points. Are generated by making them slightly different. Further, by sequentially displaying these three-dimensional images 101c having different parallaxes every minute time, the parallax is displayed so as to gradually approach the parallax of the three-dimensional image 103 like a moving image.

  Next, as shown in FIG. 12C, a stereoscopic image 101d in which the parallax of the stereoscopic image 101 is set to the same parallax as the parallax of the stereoscopic image 103 to be displayed next is displayed.

  The change in parallax in this case will be described with reference to FIG. FIG. 13 is a diagram illustrating changes in the parallax of the stereoscopic images 101 and 103, where the horizontal axis represents time and the vertical axis represents the parallax of the display image. As shown in the figure, when the frame advance is instructed, the parallax from the stereoscopic image 101 having a predetermined parallax to the stereoscopic image 101d having the same parallax as the parallax of the stereoscopic image 103 between time t20 and time t21. The display is performed so that gradually changes. Although the parallax is changed exponentially in the figure, it may be displayed so that the parallax is changed linearly. The period from time t20 to time t21 is preferably about 0.3 seconds for normal speed frame advance and about 0.1 seconds for medium speed frame advance.

Thereafter, as shown in FIG. 1 2 (d), it switches the display to the stereoscopic image 103 from the stereoscopic image 101d. This period corresponds to time t21 to time t22 in FIG. This period is preferably about 0.4 seconds for normal speed frame advance and about 0.1 seconds for medium speed frame advance.

  In this way, the stereoscopic image 103 is displayed as shown in FIG. In this state, the user can stereoscopically view the stereoscopic image 103.

  In this way, when frame advance is instructed while a stereoscopic image is displayed, the parallax of the displayed stereoscopic image is gradually changed until it becomes the same as the parallax of the stereoscopic image to be displayed next. If the parallax becomes the same as the stereoscopic image to be displayed next, the next frame is switched. By performing frame advance in this manner, stereoscopic images with the same parallax are switched, so that the user can reduce eye fatigue due to stereoscopic vision.

  In this embodiment, when frame advance is instructed in a state where a stereoscopic image is displayed, the parallax of the stereoscopic image being displayed is gradually changed to the parallax of the stereoscopic image to be displayed next. After changing the parallax of the stereoscopic image to be displayed, the parallax of the stereoscopic image is changed to the original parallax. Also good.

The change in parallax in this case will be described with reference to FIG. FIG. 14 is a diagram illustrating a change in parallax of the stereoscopic images 101 and 103, where the horizontal axis represents time and the vertical axis represents the parallax of the display image. As shown in the figure, when frame advance is instructed, during the period from time t3 1 to time t3 2, the display to a stereoscopic image 103d with a parallax of the stereoscopic image 101 from the stereoscopic image 101 having a predetermined parallax Switch.

Thereafter, during the period from time t3 2 until time t3 3, the stereoscopic image 103d with a parallax of a stereoscopic image 101 to stereoscopic image 103, by using a plurality of stereoscopic images 103c having different number of parallax, the parallax changes gradually Display is performed as follows. A large number of stereoscopic images 103 c having different parallaxes and a stereoscopic image 103 d having a parallax of the stereoscopic image 101 are generated in advance in the stereoscopic image signal processing unit 11.

  Even when frame advance is performed in this way, stereoscopic images with the same parallax are switched, so that the user can reduce eye fatigue due to stereoscopic vision.

  DESCRIPTION OF SYMBOLS 1 ... Stereoscopic image display apparatus, 10 ... Image signal processing part, 11 ... Stereoscopic image signal processing part, 14 ... Stereoscopic image display device, 16 ... CPU, 21 ... ROM, 23 ... Recording medium, 101, 103 ... Stereoscopic image, 101a 103a ... Images with no parallax, 101b, 103b ... Images with reduced parallax, 107 ... Stereoscopic image icon

Claims (8)

In a stereoscopic image display device that displays a stereoscopic image having parallax on a display unit, and in which a stereoscopic image of a current frame being displayed is frame-advanced to a stereoscopic image of a next frame in response to a frame advance instruction,
When frame advance is instructed, the display is switched from displaying the stereoscopic image of the current frame to displaying the image without parallax of the current frame, and then displaying the image without parallax of the next frame by frame advance, and then Comprising frame advance means for displaying a stereoscopic image on the display means;
The stereoscopic image display device, wherein the frame advance means performs frame advance by slide-out / slide-in. A stereoscopic image processing means for generating an image without the parallax from a stereoscopic image having a predetermined parallax;
The stereoscopic image display device according to claim 1, wherein the stereoscopic image processing unit generates an image without parallax of the next frame while displaying the stereoscopic image of the current frame.   The stereoscopic image display device according to claim 2, wherein the stereoscopic image processing unit generates an image without parallax of the current frame while displaying the stereoscopic image of the current frame.   The frame sending means displays a stereoscopic image with reduced parallax of the current frame between the display of the stereoscopic image of the current frame and the display of the image without parallax of the current frame, and the parallax of the next frame. The stereoscopic image display device according to claim 1, wherein a stereoscopic image in which parallax of the next frame is reduced is displayed between the display of no image and the stereoscopic image of the next frame.   The frame advancement unit has a large parallax between the display of the stereoscopic image of the current frame and the display of the current frame without parallax. A plurality of stereoscopic images in which the parallax of the stereoscopic image of the next frame is reduced are displayed in order of increasing parallax between the display of the image without parallax of the next frame and the display of the stereoscopic image of the next frame. The stereoscopic image display apparatus according to claim 4, wherein High-speed frame advance means for performing frame advance in a shorter time than frame advance by the frame advance means. When a frame advance is instructed, a slide-out / slide-in operation is performed using only an image without parallax without displaying a stereoscopic image. A high-speed frame feed means for frame-by-frame
Determining means for determining which of the frame advance instructions and the high-speed frame advance means is the frame advance instruction;
Control means for controlling the frame advance means and the high-speed frame advance means based on the determination result of the determination means;
The stereoscopic image display device according to claim 1, further comprising:   The stereoscopic image display apparatus according to claim 6, wherein when the frame advancement by the high-speed frame advancement unit is performed, a display indicating that the image that is the basis of the image having no parallax is a stereoscopic image is performed. In a stereoscopic image display method for displaying a stereoscopic image having parallax on a display unit, the stereoscopic image display method for frame-advancing the stereoscopic image of the current frame being displayed to the stereoscopic image of the next frame in response to a frame advance instruction.
When the frame advance is instructed, the display of the current frame stereoscopic image is switched to the display of the current frame without parallax, and then the image without parallax of the next frame is displayed by frame advance by slide-out / slide-in. A stereoscopic image display method further comprising: displaying the stereoscopic image of the next frame on the display means.

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