JP2798559B2 - 3D stereographic printing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 3D stereographic printing method using a photosensitive sheet with a lenticular sheet formed by applying a photosensitive agent to the back surface of a lenticular sheet.

[0002]

2. Description of the Related Art In a conventional 3D stereoscopic photograph using LS, the "indirect method" is a method generally performed.
There are several types of "indirect method", but here, a representative method will be described as an example.

As shown in FIG. 3, a camera 4 is moved in a horizontal direction by a predetermined distance for a three-dimensional subject 3 having a depth, and a plurality of images of the same subject 3 are taken from different directions. Create a negative.

In addition to the method of taking a picture by moving the camera horizontally and linearly, there is a method of taking a picture by moving the camera in an arc shape with respect to the subject. In any case, it is necessary to obtain a plurality of images from different viewpoints.

[0005] Instead of moving the camera to take a picture, a negative may be obtained by taking pictures at the same time by arranging a plurality of lenses horizontally or by arranging a plurality of cameras horizontally. The number of negatives is not particularly determined, but is 3-5
Is common.

[0006] In the "indirect method", a plurality of negatives obtained in the above process are changed into a lenticular sheet-equipped photosensitive sheet in which a photosensitive material is applied to the flat surface of the LS, and the projection angle is changed for each negative. Exposure.

[0007] As shown in FIG.
When the image is formed as an image on the photosensitive sheet 7 with a lenticular sheet, the image is compressed in the horizontal direction by the lenticular lens 8, so that the projected image is a lenticular lens as a linear image separated for each individual lenticular lens. Is formed on the photosensitive layer 9 on the back surface.

Next, using a negative sequentially, a projection lens, LS
Exposure is performed such that a new linear image is formed next to the line image formed by the previous projection exposure while changing the relative position of the photosensitive sheet. In this manner, the width of the back surface of the lenticular lens is filled with linear images from another negative one after another. Thus, a plurality of negative images can be printed on one photosensitive sheet. This exposure can be performed at a time by a number of projection lenses.

When the photosensitive sheet with the lenticular sheet thus produced is developed and viewed from the lenticular lens side, the line image formed on the photosensitive layer is again expanded in the horizontal direction by the lenticular lens, and appears as a restored image. . In addition, different images taken sequentially from the right eye and the left eye arrive, and the image information from the left and right eyes of the observer is synthesized, so that the viewer can view the image three-dimensionally.

[0010] How far from the photograph the stereoscopic vision can be improved by viewing the image is determined by the conditions when a plurality of images are printed on a photosensitive sheet with a lenticular sheet. In general, good stereoscopic vision is often achieved when viewed at a distance about the distance between the projection lens and the photosensitive sheet with a lenticular sheet during projection printing.
FIG. 7 is an explanatory diagram showing a stereoscopically viewable range of a 3D stereoscopic photograph created by a conventional method.

[0011]

The images taken from each direction are sequentially arranged on a photosensitive sheet with a lenticular sheet while sequentially changing the projection angle of the negatives taken from different directions. Usually, the number is smaller than the number of image bands that can be exposed on a photosensitive sheet with a lenticular sheet. The result is that the linear laterally compressed image formed on the photosensitive layer is smaller than the required width.

[0012] If the width of the linear image is insufficient, an unnecessary image enters the observer's eyes, and it is difficult to obtain a good stereoscopic view. Therefore, conventionally, the relative position between the projection lens and the photosensitive sheet with the lenticular sheet is continuously moved during the projection to form the linear image 2 enlarged in the horizontal direction as shown in FIG.

However, forming an image while moving the image is not preferable because information of a fine color pattern is lost because images of different colors overlap on the same photosensitive material. Further, actually performing such minute movement exposure requires a complicated and delicate technique. The present invention uses an exposure method that enlarges a linear image of a photosensitive sheet with a lenticular sheet substantially in the horizontal direction without impairing the image quality of a stereoscopic image, and by simple means.
It is an object of the present invention to obtain a three-dimensional photograph having a good three-dimensional effect even if the viewing position is far away with a few negatives.

[0014]

According to the present invention, a method is used in which the same linear image is formed in parallel adjacent to a linear image formed on a photosensitive sheet with a lenticular sheet to obtain a required image width. For this purpose, a means for exposing a plurality of times by slightly shifting the position with the same negative is used. The minute displacement is performed by controlling a step motor or the like by computer. In this case, exposure is performed in a stationary state, and an image in which linear images are arranged in parallel as shown in FIG. 1 is obtained. According to this technique,
As shown in FIG. 6, when projection printing is performed on a lenticular photosensitive sheet, the width can be freely changed in order.

[0015] The creation of the 3D stereoscopic photograph of the present invention is performed in the vicinity of the front.
Sensitive sheet with lenticular sheet from different angles
Exposing the light layer to a small width at the center of each lenticular
In the area near both ends, the image is formed wider than in the center.
U.

The purpose of the method of the present invention is to obtain a good 3D stereograph, and the number of exposures is increased, but the separation of the image becomes clear, and they interfere with each other as in the 3D stereograph using a conventional lenticular sheet. By avoiding obscuring the image and impairing the three-dimensional effect, it is possible to obtain a good 3D stereoscopic photograph by maximizing the ability of the lenticular sheet.

In order to obtain a stereoscopic image , it is necessary to send images having different parallaxes to both eyes. It is also apparent from simple geometrical considerations that the projection angle of the lenticular sheet lens can send different images to both eyes in a finite range . When actually viewing a 3D stereoscopic photograph using a lenticular sheet, it is often seen from almost the front of the photograph. Due to the mechanism of the lenticular sheet, a sufficient 3D effect cannot be expected even when observing from an oblique direction. Therefore, as shown in FIG. 5, when the photosensitive sheet with the lenticular sheet is exposed from an angle close to the front, the width is exposed at the center and the width is increased at both ends more than at the center. The width is determined because the appropriate viewing position changes depending on the size of the photograph.

[0018]

According to the 3D stereographic printing method using a lenticular sheet of the present invention, the width of a linear image can be enlarged without impairing good stereoscopic vision, such as losing fine color information, and the operation thereof. Is also easier,
By enlarging the width of both ends from the central part, it is possible to provide a good three-dimensional effect even if the viewing position is far with few negatives.

Although the 3D stereoscopic photograph created by the method of the present invention cannot be viewed stereoscopically when viewed from an oblique direction,
Originally, 3D stereoscopic photography is disadvantageous for oblique viewing, so there is no noticeable adverse effect. The stereoscopic view of the subject, which is the best observation position, which is captured from the front, does not change at all, and stereoscopic view is possible even from a farther position.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a linear image formed on a photosensitive sheet with a lenticular sheet by a printing method of a 3D stereograph of the present invention.

FIG. 2 is an explanatory diagram of a linear image formed on a photosensitive sheet with a lenticular sheet by a conventional 3D stereographic printing method.

FIG. 3 is an explanatory diagram of a shooting method in an indirect method of a 3D stereoscopic photograph.

FIG. 4 is an explanatory view of a method of exposing a photosensitive sheet with a lenticular sheet in an indirect method of 3D stereography.

FIG. 5 is an explanatory diagram of a 3D stereoscopic photograph created by the method of the present invention.

FIG. 6 is an explanatory diagram of an example of a 3D stereoscopic photograph in which the sequential image width is freely changed.

FIG. 7 is an explanatory diagram of a conventional 3D stereoscopic photograph.

[Explanation of symbols]

 Reference Signs List 1 linear image 2 linear image 3 subject 4 camera 5 negative 6 projection lens 7 photosensitive sheet with lenticular sheet 8 lenticular lens 9 photosensitive layer

Claims (2)

(57) [Claims] 1. In a 3D stereoscopic photograph in which linear images formed on a photosensitive sheet with a lenticular sheet are formed side by side until the required image width is obtained, an image formed on a photosensitive layer of the photosensitive sheet with a lenticular sheet has: The width is narrow at the center of each lenticular lens, and an image is formed wider at the portion near both ends than at the center.
D 3D photo printing method. 2. An image formed on a photosensitive layer of a lenticular lens-equipped photosensitive sheet, wherein an image is formed narrower at the center of each lenticular lens and wider than the center at portions near both ends. Photo.