JPH075597A - Method for printing 3d stereoscopic photograph - Google Patents

Abstract

PURPOSE:To magnify linear images substantially in a transverse direction without impairing the quality of stereoscopic images by forming in parallel the same linear images adjacent to the linear images formed on a photosensitive sheet with a lenticular lens sheet. CONSTITUTION:The same linear images 1 are formed in parallel adjacently to the linear images 1 formed on the photosensitive sheet with the lenticular lens sheet, by which the necessary image width is obtd. A means for exposing plural times by very slightly shifting positions with the same negative is adopted for this purpose. The very slight shifting of the positions is executed by controlling a step motor, etc., with a computer. The exposure is executed in a static state in such a case, by which the images arrayed with the linear images 1 in parallel are obtd. The exposure to the photosensitive sheet with the lenticular lens sheet from the angle close to the front is executed at a small width in the central part and the width larger than in the central part at both ends. This width is determined by a change in the adequate appreciation position by the size of the photograph.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is carried out by a method generally called "indirect method" in 3D stereoscopic photography using a photosensitive sheet with a lenticular sheet formed by applying a photosensitizer to the back surface of a lenticular sheet. The present invention relates to a 3D stereoscopic printing method.

[0002]

2. Description of the Related Art The "indirect method" is a commonly used method in conventional 3D stereoscopic photography using LS.
There are several types of “indirect method”, but here we will explain using a representative method as an example.

As shown in FIG. 3, with respect to a three-dimensional object 3 having a depth, the camera 4 is horizontally moved by a predetermined distance, and a plurality of images of the same object 3 are taken from different directions. Create a negative.

In addition to the method of linearly moving the camera for photographing as described above, there is also a method of moving the object in an arc shape for photographing. In any case, it is necessary to obtain multiple images from different viewpoints.

Instead of moving the camera to take a picture, a camera in which a plurality of lenses are arranged horizontally or a plurality of cameras are arranged in a row may be taken simultaneously to obtain a negative. The number of negatives is not specified, but 3-5
Is normal.

In the "indirect method", a plurality of negatives obtained in the above process are changed to a photosensitive sheet with a lenticular sheet in which a photosensitive material is applied to the flat side surface of the LS, and the projection angle is changed for each negative. And expose.

As shown in FIG. 4, the negative 5 is replaced by the projection lens 6
When an image is formed on the photosensitive sheet 7 with a lenticular sheet by means of the lenticular lens 8, the image is laterally compressed by the lenticular lens 8, so that the projected image is a linear image separated for each individual lenticular lens. An image is formed on the photosensitive layer 9 on the back surface of the.

Next, using a sequential negative, the projection lens and the LS
Exposure is performed by changing the relative position of the attached photosensitive sheet so that a new linear image is formed next to the line image formed by the previous projection exposure. In this way, the width of the back surface of the lenticular lens is successively filled with linear images from different negatives. In this way, a plurality of negative images can be printed on one photosensitive sheet. This exposure can also be performed at once by a large number of projection lenses.

When the photosensitive sheet with a lenticular sheet thus produced is developed and viewed from the lenticular lens side, the line image formed on the photosensitive layer is enlarged again in the lateral direction by the lenticular lens and is seen as a restored image. . In addition, different images captured in sequence to the right eye and the left eye arrive, the image information entered from the left and right eyes of the observer is combined, and it is possible to see stereoscopically.

How far away from the picture a good stereoscopic view can be obtained is determined by the conditions for printing a plurality of images on a photosensitive sheet with a lenticular sheet. Generally, in many cases, good stereoscopic vision can be achieved when viewed at a distance about the distance between the projection lens and the photosensitive sheet with the lenticular sheet during projection printing.
FIG. 6 is an explanatory diagram showing a stereoscopic viewable range of a 3D stereoscopic photograph created by a conventional method. .

[0011]

The images taken from different directions are sequentially arranged on a photosensitive sheet with a lenticular sheet while changing the projection angle of the negatives taken from different directions. The number of negatives taken by the indirect method is as follows. Usually, the number of image bands that can be exposed on the light-sensitive sheet with the lenticular sheet is smaller than the number of image bands that can be exposed. The result is that the linear lateral compression image formed on the photosensitive layer will be smaller than required.

If the width of the linear image is insufficient, unnecessary images will enter the eyes of the observer, making it difficult to achieve good stereoscopic viewing. Therefore, conventionally, during projection, the relative position of the projection lens and the photosensitive sheet with the lenticular sheet is continuously moved to form a linear image 2 enlarged in the lateral direction as shown in FIG.

However, it is not preferable to form an image while moving in such a manner, because fine color pattern information is lost due to overlapping of images of different colors on the same photosensitive material. In addition, in order to actually perform such minute movement exposure, a complicated and delicate technique is required. SUMMARY OF THE INVENTION It is an object of the present invention to substantially enlarge a linear image of a photosensitive sheet with a lenticular sheet in the lateral direction without impairing the image quality of a stereoscopic image and by a simple means.

[0014]

SUMMARY OF THE INVENTION The present invention is a method for obtaining a required image width by forming the same linear image in parallel adjacent to a linear image formed on a photosensitive sheet with a lenticular sheet. For this reason, a means for exposing a plurality of times by slightly shifting the position with the same negative is adopted. The minute position shift is performed by computer control of a step motor and the like. In this case, the 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.

The purpose of the method of the present invention is to obtain a good 3D three-dimensional photograph, and the number of exposures increases, but the separation of images becomes clear, and they interfere with each other like the conventional 3D three-dimensional photograph using a lenticular sheet. It is possible to obtain a good 3D stereoscopic image by avoiding the loss of the stereoscopic effect due to the unclear image and making the most of the ability of the lenticular sheet.

In order to obtain stereoscopic enhancement, it is necessary to send images with different parallax to both eyes. It is also clear from a simple geometrical consideration that the projection angle of the lenticular sheet lens can send different images to both eyes. When actually seeing a 3D stereoscopic photograph using a lenticular sheet, it is often seen from almost the front of the photograph. Lenticular sheet Due to the mechanism of the sheet, a sufficient 3D effect cannot be expected even when observed from an oblique direction. Therefore, as shown in FIG. 5, when exposing the photosensitive sheet with the lenticular sheet from an angle close to the front, the central portion is exposed with a small width and the both ends are exposed wider than the central portion. The width is required because the appropriate viewing position changes depending on the size of the photograph.

As a result, stereoscopic viewing is not possible when viewed from an oblique direction, but since 3D stereoscopic photography is originally disadvantageous for oblique viewing, it does not have a serious adverse effect.
The stereoscopic view of the subject captured from the front, which is the best observation position, does not change at all, and the stereoscopic view is possible from a farther position.

Further, as shown in FIG. 6, when projection printing is performed on the lenticular photosensitive sheet, it is possible to freely change the successive width.

[0019]

According to the 3D stereoscopic printing method using the lenticular sheet of the present invention, the width of a linear image can be enlarged without impairing good stereoscopic viewing such as the loss of fine color information and its operation. Will also be easy. In addition, by expanding the width of both ends from the central part, it is possible to provide a good stereoscopic effect even if the viewing position is far, with a few negatives.

The method of forming the linear images in parallel according to the present invention to obtain the required image width is such that the width can be freely changed for each negative, and the widths can be sequentially changed when projected onto a lenticular photosensitive sheet. By changing, it is possible to easily compensate for the lack of sequential shooting angles during shooting.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a linear image formed on a photosensitive sheet with a lenticular sheet by a 3D stereoscopic printing method 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 stereoscopic printing method.

FIG. 3 is an explanatory diagram of a photographing method in an indirect method of 3D stereoscopic photography.

FIG. 4 is an explanatory diagram of a method of exposing a photosensitive sheet with a lenticular sheet in an indirect method of 3D stereoscopic photography.

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 a 3D stereoscopic photograph created by the method of the present invention.

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

[Explanation of symbols]

 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)

[Claims] 1. A 3D stereoscopic printing method, which comprises forming linear images formed on a photosensitive sheet with a lenticular sheet so as to be adjacent to each other until a required image width is reached in the 3D stereoscopic indirect method. 2. In the 3D stereoscopic indirect method, the projection angle on the photosensitive sheet with the lenticular sheet is kept at an effective projection angle with respect to the distance between the eyes, and the exposure at both ends is performed with a certain negative to perform exposure. 3D stereoscopic printing method characterized by the following.