JPH03101581A - Stereoscopic picture display device - Google Patents

Abstract

PURPOSE:To display a stereoscopic picture without giving a limitation to a person observing a picture such as wearing of eyeglass by reading an original picture signal for each one frame signal, detecting a timewise change of the picture, separating the picture into a post-picture and a front-picture and displaying them onto the screen overlappingly. CONSTITUTION:An original picture signal 1 is read alternately to picture memories 2, 3 for each frame signal. A change detector 4 detects a timewise change in a picture and separates the picture into a post picture output signal 7 being a background of the picture and a front picture output signal 8 being a moving picture part. Picture display devices 5, 6 are constituted to be overlapped screens and viewed from the direction in the arrow 9. The distance between the picture display devices 5, 6 is selected properly to obtain the parallax of left and right eyes thereby obtaining stereoscopic visual sense.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention mainly relates to a stereoscopic image display device that converts a moving image in a landscape into a stereoscopic image.

(Prior art) As a conventional method of obtaining stereoscopic images, holograms are used to obtain
There is a method of recording three-dimensionally and reproducing it three-dimensionally, and a method that relies on parallax by projecting the three-dimensional recording by a stereo camera onto a flat surface and separating the left and right sides using polarized glasses or colored glasses. However, the former requires a special recording/playback device and the amount of information is enormous, making it unsuitable for inexpensive equipment. There are restrictions on wearing glasses.

(Problems to be Solved by the Invention) The present invention differs from these conventional techniques in that it is necessary to obtain a pseudo-stereoscopic image in which a signal that was flat during recording is made into pseudo-stereoscopic during reproduction.

[Structure of the invention]

(Means for solving problems) The present invention provides means for detecting temporal changes in images.

This is a three-dimensional image display device including an image display means consisting of a plurality of layers of screens.

(Function) The original image signal is read for each frame signal, temporal changes in the image are detected, and the subsequent and previous images are separated and displayed overlappingly on the screen.

(Example) Next, an example of the present invention will be described. FIG. 1 shows an image memory 2.3 that reads the original image signal 1 alternately for each frame signal, a change detection device 4 that detects temporal changes in images output from the one-image memory 2.3, and a change detection device 4, and an image display device 6 that displays an image based on the previous image output signal 8 from the change detection device 4. It shows.

That is, the original image signal 1 is read into the image memory 2 and the image memory 3 alternately for each frame signal.

The change detection device 4 detects temporal changes in the image.

According to the principle described later, the output signal 7 is separated into a rear image output signal 7 which becomes the background part of the image and a front image output signal 8 which becomes the moving image part. The image display device 5.6 has a structure of overlapping screens as shown in FIG. 2, and can be viewed from the direction of arrow 9. By providing an appropriate distance between the image display devices 5 and 6, parallax between the left and right eyes can be obtained, and three-dimensional vision can be obtained.

Let us now discuss the principles listed above.

Considering the case where the observation point moves from point A to point A' in Figure 3 (1), the change in angle of view α with respect to near view B is
On the 0-screen, the angle of view changes larger than β, the size of this angle of view appears as the moving distance.If we consider the case where the observation point moves from the dot to the point D' in Fig. 4, the foreground E and distant view F have the same angle of view γ, but change to angles δ and C, respectively. In this case as well, the change in the angle of view for the near view is larger than the change in the angle of view for the distant view, and the distance change for the near view on the screen is larger than for the distant view. The change detection device 4 separates the signal into two signals and outputs them according to this principle.

As an example, it can be used to increase the sense of realism in an aircraft flight simulator, and to separate the background and the object to be inspected in a visual inspection device. It is also effective when used for entertainment purposes such as game machines and car window scenery.

(Effects of the Invention) As an effect of the present invention, it is possible to display a stereoscopic image without imposing restrictions on the person viewing the image, such as wearing glasses.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an image display device showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of image display, and FIGS. 3 and 4 are explanatory diagrams of the operation of the image display device.

Claims (1)

[Claims] A set of image memory circuits that alternately read original image signals for each frame signal, a change detection device that detects temporal changes in images output from these image memory circuits, and a post-image output from this change detection device. A stereoscopic image display device comprising a first image display device that displays an image based on a signal, and a second image display device that displays an image based on a previous image output from the change detection device.