JPS63168616A - Stereoscopic image forming method - Google Patents

Abstract

PURPOSE:To permit extremely easy observation of stereoscopic images by forming a left image on one of single image media and a right image on the other respectively by dyeing and superposing the single image media on which the left image and the right image are formed on each other thereby forming an image medium. CONSTITUTION:The two single image media which are dyeable with dyes and have polarizing characteristics different from each other are prepd. The image medium is formed by forming the left image on one of such single image media and the right image on the other respectively by dyeing and superposing the single image media formed with the left image and the right image on each other. Formation of the image medium on a single plane is thus permitted by forming the right and left images which are the stereoscopic images respectively on the single image media having the polarizing characteristics different from each other and superposing such media on each other. The direct observation of the black and white and color stereoscopic images with mere wearing of polarizing spectacles is possible without necessitating special devices.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a three-dimensional image forming method, and in particular, the left and right images are mapped onto sheets of image media having different polarization characteristics, and the images are superimposed to form a single image. This was improved so that it was formed flat.

[Prior Art] Conventionally, the following methods have been used to display three-dimensional images in the form of photographs, slides, or prints.

First, the left and right images, which are projected from the two sides, are juxtaposed on the left and right as photographs or printed images, and the left and right images are viewed through optical systems such as prisms, lenses, and mirrors, respectively.
A method was adopted in which the images were separated and presented to the left and right eyes. Furthermore, there was a method using a lenticular lens as a special optical system.

The second method is to use two projectors each equipped with a filter with different polarization characteristics to project the left and right images onto a screen, or to project the left and right images onto a screen using a single projector. Two images are placed side by side, two polarizing filters with different polarization characteristics are placed on the optical path of each image, and the left and right images are superimposed on a screen through an optical system such as a prism, lens, mirror, etc.
Project. The observer wore polarizing filter glasses with different polarization characteristics on the left and right sides while observing.

A third method is to separate the left and right images into red and blue (green) colors, respectively, and shoot them as a single-screen photo or printed image directly or on a screen with a projector. Observers were required to wear two-color filter glasses to view the images.

[Problems to be Solved by the Invention] However, in the conventional three-dimensional image method described above, first, in the first method described above, the left and right images are separated,
In order to apply the light to the left and right eyes, optical devices such as prisms, lenses, and mirrors are required, which is not convenient.

In general, if a special optical system such as a lenticular lens is used, a special photographic camera is required to produce the image, and when monitoring, a three-dimensional image cannot be seen unless it is in a specific position. There were drawbacks.

In addition, in the second method described above, the method of attaching a polarizing filter to the projector and projecting the left and right images is as follows:
It is necessary to use one projector, and if one were to use one projector, a complex optical system would be required to superimpose the left and right images housed in the barrel.

Furthermore, in the third method, where the left and right images are separated using two colors, just by wearing two color filter glasses,
Images can be viewed directly or with a single regular projector, but color images cannot be reproduced.

Therefore, the purpose of the present invention is to solve the above problems,
It is an object of the present invention to provide a method for forming a three-dimensional image that can be easily displayed at a very high cost.

[Means for solving the problem] In order to achieve such an object, the present invention, for example, maps the left and right images of a stereoscopic image onto a single image medium having different polarization characteristics, and superimposes them. to form the image medium in a single plane.

That is, the present invention provides a method for forming a three-dimensional image in which the image medium can be monitored through polarized glasses, in which two single-image media that can be dyed with a dye and have mutually different polarization characteristics are prepared, and the single-image medium The left image is dyed and mapped to one of the two, and the left image is dyed and mapped to the other, and the left image and the single image medium to which the left image is mapped are superimposed to form an image medium.

[Operation] According to the present invention, it is possible to map the left and right images of a stereoscopic image onto single-image media having mutually different polarization characteristics, and to overlap them to form an image medium on a single plane.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a cross-sectional view of a portion of a polarized two-layer stereoscopic image (hereinafter referred to as Stevograph) according to a first embodiment of the present invention.

Diagram N1 shows a portion of a cross-section of the stepography, and this portion of the stepography as a whole forms a mapping screen of a suitable aspect ratio.

In the figure, 1 is a stebography, and 2 and 3 are single image media.

As shown in Fig. 1, stebography 1 is based on the principle of superimposing left images and single image media 2 and 3 on which left images are mapped onto polarizing sheets with different polarization characteristics to form a single plane image medium. It is formed.

In this example, the three primary colors red (
R), green (G), and blue (B) pigments spatially (
The mapped left and right images are mapped using a halftone method in which bright areas are covered with only color images, and dark areas are covered with black pigment to reduce the color image area. Stepography 1 is formed by overlapping two layers of single-image media 2 and 3.

FIG. 2 is a diagram explaining the principle of observing the stebography of the present invention.

In the figure, for example, a yellow image is on the left side and a green image is on the right side of the left image single-sided medium 202 that is polarized in the vertical direction.
On the other hand, in the right side medium 201 which is changed in the horizontal direction, a yellow image is stained on the left side and a green image is stained on the right side.

As polarized glasses worn by the observer, vertically polarized glasses 204 whose optical axis of linearly polarized light is vertical are used for the right eye, and horizontally polarized glasses 203 whose optical axis is horizontal for the left eye.

Single-sided media 2 for left and right sides formed as described above
When natural light is applied from below to a single plane image medium in which images 01 and 202 are superimposed, first, one-sided medium 201 for the right side
transmits horizontally polarized light over the entire wavelength range, but transmits only the yellow wavelength range on the left side of the right side and the green wavelength range on the right side for vertically polarized light. Furthermore, in the left image one-sided medium 202, this vertically polarized light is transmitted over the entire wavelength range, and only the vertically polarized light reaches the right eye through the vertically polarized glasses 204. Only the image on one side of the medium 201 is visible.

On the other hand, the left-image single-sided medium 202 transmits only the yellow wavelength range on the left side of the left image and the green wavelength range on the right side of the horizontally polarized light, so horizontally polarized glasses are used for the left eye. Since only horizontally polarized light reaches through 203, only the image on one side of the medium 202 for the left image is visible.

Even if the left and right sides overlap in this way, the left and right sides will be presented to the left and right eyes, respectively, without being affected by each other.

As mentioned above, polarized two-layer stereoscopic imaging (stebography)
As a medium, the base material is a sheet (thin plate) made of an organic material such as polyvinyl alcohol (PVA) stretched in the -axial direction, and it can be dyed with an iodine dye or a dichroic dye with an aromatic long molecular structure. Use a polarizing sheet that can be used.

In other words, with such a polarizing sheet, for example, a polarizing sheet with polarization characteristics in the vertical direction is used for the left image, and a polarizing sheet with polarization characteristics in the horizontal direction is used for the right image, and the left and right images are mapped, respectively. to create a one-sided medium. The single-sided media with the left and right sides mapped in this manner are superimposed to form a two-layer image medium.

The polarization characteristics necessary for the above-mentioned stebography are such that the single-sided medium for the two left images transmits vertically polarized light over the entire wavelength range, but for horizontally polarized light, it transmits only the wavelengths that appear on the left image. First, the one-sided medium for the right side transmits horizontally polarized light over the entire wavelength range, but it can only transmit the wavelengths on the right side of vertically polarized light.

FIG. 3 is a process diagram showing a flat head of an example of the forming method of the present invention.

In the figure, 300 is the subject, 301 and 303 are synthetic halftone image creation steps for right and left images, respectively, 302 and 304 are black staining steps for right and left images, respectively;
305 is an overlapping finishing process.

The steps of the forming method will be explained with reference to FIG. 3, taking as an example the method 6 of forming the stebography in the embodiment of the above-mentioned chest 1.

In advance, two PVA sheets 302A and 304A having orthogonal stretching axes are dyed black for the right eye and the left eye, respectively, as shown in steps 302 and 304, and an array grid of the three primary colors R, G, and B is sequentially colored in step 302B.
, 302C, 302D and 304B.

Stain with 304C and 304D.

On the other hand, according to the composite halftone image creation steps 301 and 303, the subject 300 is viewed from two directions, right and left, in step 30.
1 Photographed by A and 303A, to the left.

The condensation image of the three primary colors R, G and B on the right side is created by steps 301B, 301C, 301D and 303B, 303C, 303D in accordance with the above-mentioned array grid, and the halftone image is created in black by steps 302E and 304E. Dye all 1. The dyeing method includes photoresist etching method,
Alternatively, a screen printing method is used. The halftone image is a positive image, and the brighter the image, the narrower the black image from the periphery of the pixel to the center, which is what is called brightness area modulation.

Right on each PV sheet 302A and 3Q4A
Once the left image has been mapped, these two layers are aligned with the center of the screen, and in a superimposed finishing step 305, a superimposed image medium is completed.

[Second Embodiment] FIG. 4 is a cross-sectional view of a portion of a polarized two-layer stereoscopic image (stebography) according to a second embodiment of the present invention.

FIG. 4 shows a portion of a cross-section of the stebography IA, which portion as a whole forms a mapping screen of a suitable aspect ratio.

As shown in FIG. 4, the mapping screen uses the additive color theory as in the first embodiment to create color gradations on a non-polarized color filter in which the wavelength regions of the three primary colors red, green, and blue are arranged in a grid pattern. Accordingly, the black left and right images with different densities are mapped onto polarizing sheets 5 and 6 having polarizing properties, and the two polarizing layers 5 and 6 are superimposed together with a color filter 7 so that the pixel positions match. Stebography IA was formed using the following steps.

[Third Embodiment] FIG. 5 is a cross-sectional view of a portion of a polarized two-image stereoscopic image (stepgraphy) according to a third embodiment of the present invention.

As shown in FIG. 5, the three primary colors R, G, and
Two lattice-shaped color filters 2B and 3B are made, and the left and right images are respectively mapped in black onto a polarizing sheet.
A and 3A are respectively one side medium 2A and color filter 2B.
And one side medium 3A and color filter 3B are brought into close contact,
Stebography IB is formed by superimposing two sets created for the left and right images into two polarized light layers. The black mapping has its density changed according to each corresponding color gradation.

[Fourth Embodiment] FIG. 6 is a cross-sectional view of a portion of a polarized two-layer stereoscopic image (stebography) according to a fourth embodiment of the present invention.

As shown in FIG. 6, in the fourth embodiment, the three primary colors, yellow (Y) and cyan (C) are produced according to the theory of subtractive color mixture.

Stebography 1c is formed by superimposing left and left image single-sided media 2c and 3c mapped with magenta (M) and black (BK) mixed color dyes on two polarizing layers.

[Fifth Embodiment] FIG. 7 is a sectional view of a portion of a polarized two-layer stereoscopic image (stebography) according to a fifth embodiment of the present invention.

As shown in FIG. 7, in the fifth embodiment, the first to
Unlike the fourth embodiment, instead of dividing into color components,
This is a method of spatially dividing left and right images.

To do this, first, the two polarizing sheets 9 and 1o with different polarization characteristics are divided into a grid pattern, and every other sheet is dyed with black dye in a checkered pattern. The part dyed black and the part not dyed black of the polarizing sheet 10 having the other polarizing property (
(white) and adhere so that they overlap. Furthermore, the thin plate 1 is mapped by arranging the left and right images in a grid pattern using non-polarizing transparent printing.
Stepography 8 is formed by overlapping the above-mentioned polarizing sheets 9 and 10 so as to match the gratings at the left and right image positions.

In the above, in order to explain the method of forming a three-dimensional image for the first to fifth embodiments, the case of linearly polarized light will be described as an example of polarization characteristics, but custom polarization is not necessarily limited to this. It's a thing; it's not good.

[Effects of the Invention] As is clear from the above, according to the present invention, stereoscopic images can be directly observed in black and white and color without requiring any special equipment simply by wearing polarized glasses. Roughly,
When using a projector or overhead projector, you can observe 3D images extremely easily by using a single mount that is normally used, and by using it in the usual way and wearing polarized glasses. can do.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a part of the stepography according to the first embodiment of the present invention, FIG. 2 is a diagram explaining the principle of monitoring the stepography according to the first embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view of a portion of the stebography according to the second embodiment of the present invention; FIG. 5 is a process diagram showing the steps of the first embodiment of the forming method; FIG. FIG. 6 is a cross-sectional view of a portion of the stebography according to the fourth embodiment of the present invention; FIG. 7 is a cross-sectional view of a portion of the stebography according to the fifth embodiment of the present invention. FIG. IJA, 1B, IC, 8...Stepography, 2.2
A, 2G, 3, 3A, 3G, 5, 6, 201, 202・
...One side medium, 7.2B, 3B...color filter, 9.10...polarizing sheet, etho...thin plate, 203.204...polarized glasses, 301.303...composite halftone image creation Process, 302.3
04...Sunspot dyeing process, 305...Finishing process.

Claims (1)

[Claims] 1) A method for forming a three-dimensional image in which an image medium can be monitored through polarized glasses, which includes:
Prepare two single-image media, stain and map the left image on one of the single-image media, and the right image on the other, and superimpose the single-image media on which the left and right images have been mapped,
A three-dimensional image forming method comprising forming the image medium. 2) The single image medium is spatially divided into pixel units, and the three primary color components of the left image and right image are assigned to the spatially divided pixels and mapped respectively. 3. The stereoscopic image forming method according to item 1.