JP2004336334A - Streoscopic image displaying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stereoscopic image displaying method by which images are stereoscopically viewed by simple devices. <P>SOLUTION: In the case of reproducing moving images photographed by a video camera or the like on two display devices 20, 22 corresponding to right and left eyes, when the movement of an image has a speed in a fixed range and the movement of the moving image has the same directional components as the array directions of the two display devices 20, 22, an image to be sent to the display device 20 or 22 located on the moving direction side of the moving image is slightly delayed by a delay device 16, and then the delayed image is sent to the display device 20 or 22. The image passing through the delay device 16 is inputted to a right/left selection circuit 18, and one of images to be sent to the display devices 20, 22 is delayed, and the other image is not delayed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stereoscopic video display method that allows a moving image captured by an imaging device such as a video camera to be viewed three-dimensionally.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. 7-220113 Generally, as disclosed in Patent Document 1, two video cameras simultaneously shoot one shooting target with a predetermined parallax, as disclosed in Patent Document 1. That is, the two monitors are reproduced so that different monitors are viewed by the left and right eyes, and the parallax seen by the human eyes is reproduced on the two monitors to enable stereoscopic vision.
[0003]
On the other hand, in recent years, goggle-type display devices to be used in sight are provided at low cost. Such a display device has a separate liquid crystal display device located in front of both eyes, and is a device that looks as if viewed on a large screen.
[0004]
[Problems to be solved by the invention]
However, the three-dimensional image display device of the related art requires two imaging devices, and one subject must be photographed by two imaging devices at the same time, and the device becomes large-scale. . Further, only videos shot by two dedicated imaging devices can be reproduced in a three-dimensional manner, and a three-dimensional video cannot be easily viewed. Further, the goggle type display device is not provided with three-dimensional reproduction simply because two display devices are provided corresponding to both eyes.
[0005]
The present invention has been made in view of the above-described conventional problems, and has as its object to provide a stereoscopic image display method that can be stereoscopically viewed with a simple device.
[0006]
[Means for Solving the Problems]
According to the present invention, for example, when a moving image captured by an imaging device such as a single video camera is simultaneously reproduced on two display devices corresponding to the left and right eyes, the motion of the reproduced image causes the motion of the image to be reduced. In the case of a moving image having a speed within a certain range and having the same directional component as the direction of the arrangement of the two display devices, the moving image is sent to the display device located on the side of the moving direction of the moving image. This is a stereoscopic video display method in which an image is slightly delayed by one to several frames and displayed on the display device.
[0007]
The display device is formed in a goggle type, and each display device such as a liquid crystal is positioned corresponding to the left and right eyes. Further, the stereoscopic effect may be enhanced by setting the delay time of the image displayed on each of the display devices to be larger than the time difference corresponding to the actual parallax of the left and right eyes.
[0008]
Further, according to the present invention, when an image photographed through a microscope is reproduced on two display devices corresponding to the left and right eyes, the observation object is swung in the direction in which both eyes are arranged, and the image obtained thereby is obtained. Is displayed on the display device for the right eye, and the image displayed when the display device is swung to the right is displayed on the display device for the left eye.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a first embodiment of the present invention. An apparatus used for a stereoscopic video display method according to this embodiment reproduces a moving image recorded on a video tape or a disk or an image captured by an imaging device. And a motion detecting device 12 for detecting the motion of the moving image output from the reproducing device 10. The motion detection device 12 obtains image data for each frame of a moving image, for example, by individually comparing the value of the pixel of each image sensor of the captured image or the value of each pixel of the data with the value of the screen immediately before or a predetermined frame before. Can be. When the motion of the image is detected by the motion detecting device 12, the direction of the motion is determined by the moving direction detecting device 14. The detection of the moving direction determines whether or not there is a component that moves in the horizontal direction of the screen. Note that the motion detection device 12 and the movement direction detection device 14 may be the same device.
[0010]
The reproduced image is branched at a branch point 16 into two outputs of the same image. Note that the image branched at the branch point 16 may be an image directly sent from the playback device 10. One of the split images is input to a delay circuit 16 composed of a frame memory or the like, delayed by a predetermined time, for example, one frame or a predetermined number of frames, and output to the left / right selection circuit 18. The other reproduced image branched at the branch point 16 is output to the left / right selection circuit 18 as it is.
[0011]
In the left / right selection circuit 18, when the motion of the image is a speed within a certain range and has the same directional component as the direction of the arrangement of the two display devices 20 and 22, the motion of the moving image The image to be sent to the display device on the side in the direction of is slightly delayed by the delay device 16.
[0012]
Here, the principle of this stereoscopic video display method will be described with reference to FIG. In general, a method of enabling stereoscopic viewing is based on a parallax δ, which is an angle difference in a viewing direction caused by viewing the same object with the left and right eyes when viewing the object with human eyes. Therefore, as described in the related art, the conventional three-dimensional image display apparatus uses two video cameras to generate parallax and records images at different angles with respect to the object. On the other hand, in this embodiment, when an image is moving, stereoscopic viewing can be easily performed by using the movement.
[0013]
Therefore, assuming an object 24 moving in a horizontal direction at a constant speed, an image seen at a predetermined time before and after a certain instant t0, for example, at t1 one frame before and at t2 one frame after, is an object in the horizontal direction. Since 24 is moving, it looks different, as indicated by the phantom lines in FIG. On the other hand, the images viewed by the left and right eyes at a certain instant t0 are images having different viewing angles due to the difference in the positions of the left and right eyes. Then, when the times t1 and t2 are set so that the image of the object 24 due to the difference in the viewing angle between the left and right eyes and each image at the times t1 and t2, the display devices 20 corresponding to the left and right eyes are set. By displaying the image displayed on the display device 22 on the display device 20 corresponding to the left eye with respect to the image on the display device 22 corresponding to the right eye with a delay of t2−t1, the image displayed on the left and right eyes is displayed. The viewed image is the same image as the reproduced image having the parallax δ, and the object 24 looks three-dimensional. Further, the stereoscopic image may be emphasized by setting the delay time so that the image has an angle larger than the actual parallax.
[0014]
According to this principle, when the motion detecting device 12 detects that the object 24 is moving, the motion of the image has a speed within a certain range, and the same directional component as the direction of the arrangement of the two display devices. In the case of a moving image having a moving image, an image to be sent to the display device on the direction side of the moving image is selected by the left / right selecting circuit 18 to be an image that has passed through the delay device 16, and the other table device has a delay. Send an image that is not allowed. The left / right selection circuit 18 selects which display device to send the delayed image based on the detection signal from the movement direction detection device 14.
[0015]
In this stereoscopic video reproducing apparatus, when there is no movement in the direction of the left and right eyes, that is, in the horizontal direction, the stereoscopic video reproducing apparatus does not look stereoscopic. In addition, when the movement is too fast or when the image itself is switched, it cannot be applied, so the movement is applied when the movement is within a certain range. Accordingly, the delay device 16 operates only when the motion of the moving image detected by the motion detection device 12 is within a certain range, and otherwise outputs the image to the left / right selection circuit without delay. If there is no delay between the branched image outputs, the left / right selection circuit may send any image to any of the display devices 20 and 22. For example, each of the display devices 20 and 22 may be transmitted along the immediately preceding switching path. It is good to send the image to.
[0016]
With this stereoscopic video display method, even if a moving image is shot by one video camera, if there is an object that moves in the horizontal direction in the image, the object can be seen in a three-dimensional manner. The display device can make the object 24 moving left and right look three-dimensional by, for example, reproducing it with a goggle-type moving image reproducing device 26 having display devices 20 and 22 corresponding to the left and right eyes. .
[0017]
It should be noted that the stereoscopic video display method of the present invention can make an image viewed with a microscope, for example, look more stereoscopic than a video image. For example, an imaging device is attached to an objective lens unit of a binocular stereo microscope, a display device corresponding to both eyes is provided in an eyepiece unit, or a goggle type display device is provided as an output of information captured by the imaging device, and a microscope stage is provided. The image is swung by a small angle corresponding to the parallax δ, and the image when swung to the left is displayed on the display device for the right eye, and the image when swung to the right is displayed on the display device for the left eye. As a result, a microscope image can be seen in the same manner as seen with both eyes. The stage may be moved in the horizontal direction instead of swinging. This case is the same as the above embodiment.
[0018]
The apparatus and images to which the stereoscopic video display method of the present invention is applied can be appropriately selected from televisions, movies, images reproduced by DVDs, images photographed by video cameras and other imaging devices, and the like. The present invention is not limited to each embodiment. In addition to the case where an object moves, an image taken while a photographer or an imaging device moves can be reproduced and displayed in a three-dimensional manner by the same processing. The types of the reproducing device and the display device are not limited, and the display device may be provided with a display device corresponding to the left and right eyes.
[0019]
【The invention's effect】
According to the three-dimensional image display method of the present invention, existing moving images can be easily viewed three-dimensionally with a simple device. Also, when an image of a microscope or the like is captured by an imaging device, the image captured by one imaging device can be stereoscopically displayed.
[Brief description of the drawings]
FIG. 1 is a block diagram of an apparatus used for a stereoscopic image display method according to an embodiment of the present invention.
FIG. 2 is a diagram showing the principle of the stereoscopic video display method of the present invention.
[Explanation of symbols]
Reference Signs List 10 playback device 12 motion detection device 14 moving direction detection device 15 branch point 16 delay device 18 left and right selection circuits 20, 22 display device 24 object

Claims (4)

When a moving image captured by an imaging device is played on two display devices corresponding to the left and right eyes, the movement of the image causes the image to move within a certain range. In the case of a moving image having the same direction component as the direction of the arrangement of the display device, the image sent to the display device located on the side of the moving direction of the moving image is displayed on the display device with a slight delay. A stereoscopic video display method characterized by the following. The stereoscopic image display method according to claim 1, wherein the display device is formed in a goggle type, and each display device is positioned corresponding to the left and right eyes. The stereoscopic video display method according to claim 1, wherein a delay time of an image displayed on each of the display devices is set to be larger than a time difference corresponding to actual parallax of the left and right eyes. When an image captured through a microscope is reproduced on two display devices corresponding to the left and right eyes, the observation target is swung in the direction in which both eyes are arranged, and the display of the obtained image is displayed on the left side. A three-dimensional image display method, wherein an image when swinging to the right is displayed on the display device for the right eye, and an image when swinging to the right is displayed on the display device for the left eye.

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