JP2000305042A - Method for making plane video stereoscopic by applying lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a viewer to freely and easily enjoy a stereoscopic video with mush appeal by projecting the slightly different videos on left and right eyes and changing the plane video of a television or a movie to the video having a stereoscopic effect in order to make use of stereoscopic visuability of visual perception. SOLUTION: The video including aberration is projected on a screen by plane lenses 5 and 6. When it is viewed by the left and the right eyes, the slightly different videos are projected on the left and the right eyes because of the aberration. By synthesizing parallax by the brain, the video with the stereoscopic effect can be viewed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
Using (image distortion), visual 3D
The present invention relates to a three-dimensional image technology utilizing visual ability.

[0002]

BACKGROUND OF THE INVENTION Stereoscopic cinema was invented in 1935 by Jack Norrimb. The left and right images are printed with a single film of red and blue and viewed with red and blue filter glasses. In other words, the same color image is canceled and the opposite color image is distributed to the left and right, only for monochrome works. I couldn't use it and my eyes were tired. Color stereoscopic movies were invented by Shilton Gunzberg. It uses Polaroid (deflection) glasses, and two right and left cameras shoot the left and right images and project them simultaneously with synchronized projectors. At this time, a deflection filter whose optical axes are perpendicular to each other is mounted in front of both projection lenses. If you sort it with Polaroid glasses, you will get a three-dimensional effect. In addition, a method is developed in which one frame is divided and the left and right images are stored on one film. The disadvantage of this method is that the effective area of the film is less than half the size, so that the amount of light is insufficient and the projection screen becomes dim. A three-dimensional movie without glasses, developed in the Soviet Union, was projected on a wavy screen with vertical stripes like a fine galvanized iron plate, and the reflection reflected the image to the left and right eyes. In television, the screen of the monitor is finely divided into vertical stripes, and slightly different images taken by two cameras with slightly different angles are projected on a line-by-line basis. A slit is formed between the different vertical stripes of the two images. Attached to the left and right eyes to move the different images to obtain a three-dimensional image. This method also has a three-dimensional effect, but has a narrow visual range. In this way, conventional stereoscopic video technology requires special tools to appreciate it, or it can be seen only in a limited area and in a limited range, so it is easy to enjoy stereoscopic video rather than general I couldn't do that.

[0003]

The conventional method requires images taken by two cameras in order to connect different images to the right and left eyes. That is, a stereoscopic image cannot be seen unless it is a special image. In addition, the images taken by the two cameras are distributed to the left and right eyes, so that the two images do not enter one eye, wear glasses or use the stereoscopic effect only in a limited place or a limited position. I can't see the video with the shadow. By solving these drawbacks, any video can be freely viewed as a stereoscopic video.

[0004]

When an object is viewed through an ordinary lens, a certain part is clear, but a part around the object is blurred or distorted, and a color appears at an edge of the object. Many. Such distortion or blurring of an image is generally called aberration. Aberrations appearing on a spherical surface such as a lens or a spherical mirror or a combination of spherical surfaces are widely referred to as spherical aberration, and the spherical aberration is related to a distance between an object and an optical axis and a size of a stop. For example, when a graph paper is photographed, a straight line image that does not pass through the center does not become a straight line but has a shape as shown in FIG. This aberration is called (image) distortion. This is an aberration that remains irrespective of the size of the stop, no matter how small the radius of the stop. An aberration called distortion is that a plane image perpendicular to the optical axis becomes a curved surface (FIG. 2). This aberration is called image surface warpage (image surface curvature). The two aberrations, distortion and image warpage, remain even if one image becomes one point, but rays from points far away from the optical axis, even if they are of a sufficiently narrow bundle Looking at a cut perpendicular to the direction of the ray, which generally does not intersect at one point after reflection, refraction, and refraction, it differs depending on the cutout position.
It looks like below. The above three kinds of aberrations appear more prominently when the point of the object is considerably away from the optical axis. Even if the distance between the object and the optical axis is short, when the inclination of the light beam with respect to the axis increases, that is, when the radius of the stop increases, an aberration called coma appears. This is an aberration in which an image of one point due to the optical axis ray has a shape like trailing an angle of 60 degrees (FIG. 4). The four aberrations from distortion to coma disappear when the point of the object is on the optical axis, but even in this case, a complete image is not always obtained. The intersection of the reflected light beam and the refracted light beam depends on the inclination of the light beam with respect to the optical axis. Considering these aberrations described in the above description, when viewing the television screen, which is a single planar image, through the lens, it becomes as shown in FIG. 5, and a virtual image (1) is formed on the left side of the lens, and the television screen looks small. . At this time, on the right side of the lens, there is a light spread according to the refractive index of the lens (2). In other words, different angles of light enter the right eye (3) and the left eye (4) depending on the viewpoint of the left and right eyes.
This means that although there is only one TV screen as can be understood from the description of astigmatism and coma, slightly different images appear in the left and right eyes due to aberrations. By combining this parallax into one image by the brain, a two-dimensional image on a television can be viewed as a three-dimensional image. The difference between the left and right eyes due to this aberration is too small compared to the conventional stereoscopic image, which is taken by two cameras considering the difference in the viewpoint of the human eye, to the left and right eyes. Is considered too much,
It is enough to explain that human normal stereoscopic vision can see an object several hundred meters away in three dimensions, and the difference between the images seen by the left and right eyes in this case is too small to be discerned by human senses it can.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In a case where a basic form for applying the above method is applied to a television image in FIG. 6, a screen (8) can be obtained by placing a focal point in front of a television screen.
A three-dimensional image is projected. The light of the television image is reduced to a small image by the convex lens (5) and enlarged by the concave lens (6). At this time, when the image of the television passes through the convex lens (5), the image has a spread of the image due to the refractive index of the convex lens (5), and this image is an image including the lens aberration as can be understood from the above description. After being reflected by the mirror (7) and reflected on the screen (8), its state does not change even after passing through the screen (8). This is an image in which the electron beam emitted from the electron beam from the television image hits the fluorescent substance of the cathode ray tube, and the electron beam is light that is hardly diffused by horizontal and vertical polarized light and has a strong traveling power Therefore, even after passing through the screen, the state of light does not change and the aberration (distortion of the image) is maintained. Looking at the image projected on this screen is the same as when viewing directly with a concave lens, and the image formed on the left and right eyes due to aberration is slightly different due to the difference in the viewpoint of the left and right eyes. By combining the left and right parallaxes as one image by the brain, a television image can be viewed as a three-dimensional image.

[0006]

By applying this stereoscopic imaging method, there is no need to make any changes when shooting or producing images, and all images including completed television images, computer graphic films, and images taken on film. It is effective for TV and can be enjoyed at home if it is applied to a TV, and without glasses when applied to a movie projector,
You can freely watch powerful stereoscopic images on a large screen, not only within a limited area.

[0007]

FIG. 7 shows an apparatus for collecting the light of an arc (9) with a lens (11) in a movie projector and projecting the resulting image on a screen with a magnifying lens (15) on a movie film (13). is there. Since the image is enlarged by the lens, the image on the screen (16) should look three-dimensional due to the aberration of the lens, but does not look three-dimensional. This is intended to minimize the aberration of the magnifying lens (15) in order to project an image on the clear. This aberration is too small compared to the size of the image, and no parallax is generated to obtain a stereoscopic effect on the left and right eyes. Therefore, a lens (14) is provided between the film (13) and the magnifying lens (15), the aberration of which is adjusted to obtain a three-dimensional effect.
As a result, even if the image is large, the image becomes a three-dimensional image, and the powerful three-dimensional image projected on the large screen can be freely watched without wearing glasses or fixing the head.

[Brief description of the drawings]

FIG. 1 is an image distortion.

FIG. 2 is image warpage.

FIG. 3 Astigmatism An image formed on a plane perpendicular to a ray at each position between B and G.

FIG. 4 is a view showing a frame.

FIG. 5 is a view showing a difference between images entering right and left eyes.

FIG. 6 is a three-dimensional image machine using lens aberration.

FIG. 7 is a projector incorporating a lens for adjusting lens aberration.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Virtual image of television screen 2 Concave lens 3 Right eye 4 Left eye 5 Convex lens 6 Concave lens 7 Reflector 8
Screen 9 Spherical mirror 10 Light source for projection 11 Condensing lens 12 Film magazine 13 Film 14 Aberration adjusting lens 15 Projection lens
16 screen

Claims (1)

[Claims] 1. A flat television or movie image is reduced to a small image by a convex lens, and aberration generated by the lens.
By enlarging an image with (image distortion) with a concave lens and projecting it on the screen, the left and right eyes seeing it form slightly different images due to lens aberrations, and the brain combines them into one image How to make 3D images