KR20020066894A - System for displaying immersion-type three-dimensional images - Google Patents

Abstract

PURPOSE: A stereoscopic image display system is provided to obtain an image in an inexpensive and simple manner, while allowing correction for image distortion and brightness at the superimposed portion between motion image and still image to be performed in an inexpensive and simple way. CONSTITUTION: A stereoscopic image display system comprises an image obtaining unit for obtain a motion image to be projected to a central screen(12b) of a large screen(11) and a still image to be projected to left and right screens(12a,12c); image signal storing/reproducing units(17a to 17c) for separately storing motion image and still image obtained from the image obtaining unit and reproducing the stored image; video projectors(19a to 19c) for projecting, onto the central screen, the motion image reproduced by the image signal storing/reproducing units, and projecting the still image onto left and right screens; and a control unit(15) for controlling projection timing for the motion image and still image, and correcting the superimposed portion between the central screen and left and right screens.

Description

System for displaying immersion-type three-dimensional images}

The present invention relates to an immersive stereoscopic image display system, and more particularly, to an immersive stereoscopic image display system for projecting an immersive stereoscopic image formed by combining at least three or more multiple images onto a partial curved screen or a curved screen.

Since general video images are flat images or have an aspect ratio of 4: 3, viewers recognize the edges of the screen and cannot get immersion when watching a movie. On the other hand, when the viewer approaches the screen in order to immerse the field of view, the resolution of the video image is lowered to reduce the realism of the image.

On the contrary, the immersive video stereoscopic image is an image made to prevent the viewer from recognizing the edge of the screen, and unlike the general video image, there is an advantage of maximizing the realism, the realism and the impact of the image. This immersive video stereoscopic image combines and projects multiple images, increasing the resolution of the entire image to about three times or more than the existing image, increasing the brightness of the image, and displaying a large screen at a shorter projection distance. The audience is trapped in the panoramic image to provide immersion and realism.

As a method for realizing a large screen, first, a special ultra-large film is used, which is a disadvantage in that the structure and cost of a building are large because it uses an extra-large screen of 23 meters in width and 18 meters in length. Second, in the implementation of horizontally immersive video image of panoramic format, when multiple video is combined and projected on the screen, the overlapped part is increased by the overlap of the projector light, so the audience recognizes the connection part. A special processor can be used to recognize a seamless image, or a real-time processor can be used to correct distortion of the connection between the videos obtained by arranging multiple video cameras. However, in this case, there is a problem that the special processor or the real-time processor is expensive. Third, using a camera that shoots 360-degree immersive images by arranging multiple cameras in a geodesic manner, which is economical and technically difficult to construct as a spherical screen, and because the images are distorted In the stereoscopic image using images of left and right eyes, eye fatigue is increased.

Accordingly, an object of the present invention is to solve the above problems, and implements a large screen consisting of a center screen and a left / right screen as a partial curved screen or a curved screen, and the center screen is a video and the left / right screen of the center screen. Is to provide a cheap and simple immersive stereoscopic display system by projecting on a still image.

In order to achieve the above object, the immersive stereoscopic image display system according to the present invention is an image for acquiring a still image which is a background of a video to be projected on a center screen and a video to be projected on a left / right screen of the center screen on a large screen. Obtaining means; Video signal storage / reproducing means for storing and reproducing the moving picture and the still picture obtained from said image acquisition means separately; Projection means for projecting a moving picture reproduced from the video signal storing / reproducing means on the center screen and the still image on the left / right screen; And control means for controlling an image signal storage / reproducing unit to adjust projection timings of the moving image and the still image.

In this case, the large screen is a curved screen that is bent about 40 degrees having the same curvature with the aspect ratio of the center screen and the left / right screen 1: 1. In addition, the large screen has a ratio of a central screen and a left / right screen of 2: 1 or more, and the central screen is a quasi-planar screen (about 5 degrees bent), while the left / right screen has the same curvature. The angle to the center screen is adjusted according to the length of the entire screen. In addition, the large screen has a ratio of a ratio between the center screen and the left and right screens of 2: 1 or more, and the center screen is a quasi-planar screen, while the curved screen is curved about 40 degrees with the same curvature. Is done.

According to this configuration, not only can a cheaper and more easily obtain an immersive image on a large screen composed of a partial curved screen or a curved screen, but also a moving picture between a center screen and a left / right screen and a still image can be overlapped. There is an advantage that the distortion and brightness correction of the image in the joint portion can be performed more cheaply and simply.

1 is a block diagram showing the configuration of an immersive stereoscopic display system according to the present invention;

2A is a configuration diagram according to an embodiment of a large screen applied to the immersive stereoscopic display system shown in FIG. 1;

2B is a configuration diagram according to another embodiment of a large screen applied to the immersive stereoscopic display system shown in FIG. 1;

* Explanation of symbols for main parts of the drawings

11: large screen 12a: left screen

12b: center screen 12c: right screen

13a, 13b: seam part 15: control unit

17a, 17c: Still image storage / playback section 17b: Video storage / playback section

19a, 19b, 19c: video projector

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a configuration of an image system according to the present invention, in which a large screen 11 has three regions, that is, a left / right screen 12a and 12c of a center screen 12b and a center screen 12b. Let's take the example divided by.

The video system of the present invention includes a large screen 11, a synchronization unit 15, first and second still image signal storage / playback units 17a and 17c, a video signal storage / playback unit 17b, and first through to And third video projectors 19a, 19b, 19c.

The first and second embodiments of the large screen 11 are as shown in Figs. 2A and 2B, respectively.

Looking at the first embodiment of the large screen 11 shown in Figure 2a, the center screen 21 is made of a quasi-planar screen (bent about 5 degrees) having an aspect ratio of 2: 1 or more, while the left and right screen 22 (23) is a screen having the same curvature, the angle with the center screen is adjusted according to the length of the entire screen, the horizontal length (b1: a1 or c1) of the center screen 21 and the left and right screens (22, 23) ) Is preferably 2: 1 or more. In this case, the left and right screens 22 and 23 may be formed as curved screens having the same curvature of about 40 degrees.

Looking at the second embodiment of the large screen 11 shown in FIG. 2B, the center screen 24 and the left / right screens 25 and 26 are curved screens having the same curvature of about 40 degrees. Preferably, the ratio of the horizontal length (a2 or c2: b2) of the center screen 24 and the left / right screens 25 and 26 is 1: 1.

In order to prevent the difference in image brightness according to the projection angles of the video projectors 19a, 19b, and 19c, the screen of the large screen 11 preferably has a gain of 1 or less.

Meanwhile, the image projected on each screen of the large screen 11 is as follows.

In the present invention, when the large screen 11 as shown in FIGS. 2A and 2B is applied, the moving image is projected on the center screen 12b, and the still image becomes the background of the moving image on the left and right screens 12a and 12c. Project the image. The still image is projected on the left / right screens 12a and 12c each time the background of the video is changed, and remains until it is moved to the next background. That is, in obtaining one wide image by combining at least three multiple images, most of the viewing angle of the audience, which is about 120 degrees, is concentrated on the center screen 12b in one wide image, so that both edges, that is, the left / right screen ( The images of 12a and 12c are merely spatial image data for immersion rather than the purpose of delivering the contents of the image. Therefore, when the large screen 11 as shown in FIG. 2A is used, the image to be projected on the center screen 12b is composed of a high quality video having an aspect ratio of 2: 1 or more, and is projected onto the left / right screens 12a and 2c. The video is composed of a still picture without a dynamic object (for example, an actor) as the background of the video. As a result, it is possible to economically and easily provide a panoramic image, that is, an immersive stereoscopic image.

More preferably, when the large screen 11 as shown in FIG. 2B is applied, a video is projected on the center screen 12b, and the left screen 12a has a still image on its left half, An image in which a moving picture is combined is projected on the right half, while an image in which the left half is combined and a still image is projected on the right half is projected on the right screen 12c.

Meanwhile, reference numeral 13a denotes a joint portion where a still image projected by the first video projector 19a and a video projected by the second video projector 19b overlap each other, and reference numeral 13b denotes a projected by the second video projector 19b. The moving picture and the still image projected by the third video projector 19c overlap each other.

Next, various methods of producing an immersive stereoscopic image according to the present invention will be described.

First, a panoramic image having an aspect ratio of 2.35: 1 or more may be photographed using a stereoscopic camera lens, and then converted into a video format through telecine to obtain a video to be projected on the center screen 12b. .

Alternatively, by attaching an anamorphic adapter to two digital cameras, it cuts off the top and bottom of the charge-coupled device (CCD) for an image with a 4: 3 aspect ratio in a typical camera and obtains a wide screen. A wide angle stereoscopic image can be obtained with high image quality without any image quality loss. The anamorphic adapter lens, also called a wide-angle adapter lens, provides an optically horizontally compressed wide-angle image to an image pickup device of a 4: 3 image, that is, a CCD. Alternatively, computer graphics can be used to obtain wide-angle images of animation or photorealistic synthesis.

Next, the still image to be projected on the left / right screens 12a and 12c is still photographed by installing four digital cameras of the same kind as described above, or a high-quality digital still camera is used to obtain a high-quality still image.

The motion picture and the still picture obtained as described above are connected to each other, i.e., the joint area between the motion picture of the center screen 12b and the still picture of the left and right screens 12a and 12c using commercial software such as Adobe Photoshop or Paintshop Pro. Brightness in the seam portions 13a, 13b that may occur when correcting image distortions caused by differences in camera angles occurring in the 13a, 13b, or projecting with the first to third video projectors 19a, 19b, 19c. Adjust the difference ahead of time. That is, the brightness of the portion of the still image overlapping with the video of the center screen 12b is adjusted to be darker. As a result, when projecting a combination of the still image of the left / right screens 12a and 12c and the moving image of the center screen 12b, the joint portion 13a, without using a conventional expensive special-purpose processor or real-time processor, is projected. The difference in image distortion and brightness in 13b) can be eliminated.

1 again, the first and second still image signal storing / reproducing units 17a and 17c and the moving image signal storing / reproducing unit 17b are for storing / reproducing the immersive stereoscopic image secured as described above. . The first and second still image signal storing / reproducing units 17a and 17c and the moving image signal storing / reproducing unit 17b are six laser disc (LD) players or digital devices having a commercially-generated locking function. It can be implemented as a video disc (DVD) player or as a computer system with the ability to play / output multi-channel video. The LD or DVD player preferably has a function of restoring a horizontally compressed anamorphic image to a wide-angle image of a normal image by de-anamorphizing or decompressing the anamorphic image. On the other hand, the first and second still image signal storage / playback unit (17a, 17c), when the large screen shown in Figure 2b is applied, respectively for the horizontal length of the left screen 12a of the still image and video An image combined with a 1: 1 and an image combined with a 1: 1 with respect to the horizontal length of the right screen 12c may be stored.

The first and third video projectors 19a and 19c and the second video projector 19b respectively receive from the first and second still image signal storage / playback units 17a and 17c and the video signal storage / playback unit 17b. For projecting still images and moving images to be reproduced on the left / right screens 12a and 12c and the center screen 12b. When the large screen 11 is implemented as a partial curved screen as shown in FIG. 2A, when the curvature of the left and right screens 12a and 12c is about 5 degrees, the center screen 12b is formed using a liquid crystal (LCD) projector. ) And the left and right screens 12a and 12c. On the other hand, when the left and right screens 12a and 12c are composed of a screen having a more curvature, for example, when the curvature is about 40 degrees, the central screen 12b of the immersive video stereoscopic image is a stereoscopic center picture. The second video projector 19b for projecting onto the first and second screens uses a liquid crystal (LCD) projector that natively supports an aspect ratio of 16: 9, and projects the background image onto the left and right screens 12a and 12c. The three video projectors 19a and 19c project onto the curved screen using a beam setting (CRT) projector that has the function of correcting geometry settings, i.e., distortion on the curved screen. Here, it is also possible to use a liquid crystal projector using a special lens manufactured by matching the lens to the curvature of the screen instead of the beam projector.

Meanwhile, when the large screen 11 is implemented as a curved screen as shown in FIG. 2B, the moving image and the still image are respectively displayed on the center screen 12b and the left / right screens 12a and 12c of the immersive video stereoscopic image. Projecting second video projector 19b and first and third video projectors 19a and 19c both use beam projectors, and by setting the geometry, a normal one in which distortion on an image on a curved surface of a still screen is corrected. Immersive stereoscopic images can be obtained.

The controller 15 controls the timing at which the moving image is projected from the second video projector 19b to the center screen 12b and the still image from the first and third video projectors 19a and 19c. For controlling the timing projected to 12c), playback points of the first and second still image storage / playback units 17a and 17c and the moving picture storage / playback section 17b are controlled.

As described above, according to the present invention, a large screen consisting of a center screen and a left / right screen is realized as a partial curved screen or a curved screen, and the center screen is a video and the left / right screen of the center screen is projected by a still image. In addition to cheaper and easier to obtain images that can be immersed on a large screen, it is cheaper to correct distortion and brightness of the image at the joint area where the moving picture between the center screen and the left / right screen and the still image overlap. There is an advantage that can be done simply.

Claims (4)

Image acquisition means for acquiring a still image, which is a background of a moving image to be projected on a center screen and a moving image to be projected on the left and right screens of the central screen, to realize an immersive stereoscopic image; Video signal storage / reproducing means for storing and reproducing the moving picture and the still picture obtained from said image acquisition means separately; Projection means for projecting a moving picture reproduced from the video signal storing / reproducing means on the center screen and the still image on the left / right screen; And And a control means for adjusting the projection timing of the moving image and the still image, and correcting an overlapping portion of the center screen and the left and right screens. According to claim 1, wherein the center screen is a quasi-planar screen, while the left / right screen is a curved screen having the same curvature, the aspect ratio of the center screen and the left / right screen is 2: 1 or more. Large screen image synthesis method. The immersive stereoscopic image display system of claim 1, wherein the center screen and the left / right screen are formed of curved screens having the same curvature, and the aspect ratio is 1: 1. The image of claim 3, wherein the left screen is projected by combining a still image and a moving image with respect to the horizontal length of the left screen. Immersive stereoscopic image display system, characterized in that the projection.