JPH11212024A - Method and device for image display using lenticular lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the picture quality of the image display device which uses the lenticular lens more by sufficiently separating images. SOLUTION: This is an image display method of an image display device constituted so that a compressed image formed on an image sheet is observed through a lenticular screen 11 consisting of lenticular lenses and a beltlike buffer area 21a is provided between adjacent compressed images 12b formed on the image sheet 12 corresponding to one lenticular lens 11a; when the adjacent compressed images are observed through the lenticular screen at a viewpoint position changing continuously, two images of those compressed images 12b are observed while separated from each other because of the presence of the buffer area 21a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display method and apparatus in an image display apparatus configured to observe a compressed image through a lenticular screen, and to a device for producing the same.

[0002]

2. Description of the Related Art Conventionally, there has been known an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses. Such an image display device is typically used as a stereoscopic photograph or a stereoscopic video without glasses. It is also used as an advertising photograph or a toy in which different images can be seen depending on the viewpoint position of the observer. Furthermore, in order to check a form such as a golf swing or baseball batting, a series of these operations are continuously photographed (continuously shot) by a camera, and a plurality of images (still images) obtained by the continuous shots are taken. Image) is used to observe the images one by one in order.

As shown in FIG. 6A, such an image display device has a band-like compressed image 82 of a plurality of images.
The image sheet 82 includes an image sheet 82 on which the b is formed, and a lenticular screen 81 disposed on the image sheet 82.
Also, as shown in FIG. 6B, below one lenticular lens 81a, there are compressed images 8 equal to the number of original images.
2b are formed, and the compressed images 82b are arranged on the image sheet 82 without gaps.

[0004]

However, in the above-described conventional image display device 80, since the adjacent compressed image 82b is arranged without any gap between them, the observer can view the image display device 80 from the viewpoint. When the position is continuously changed, one compressed image 82b-
1 and the next compressed image 82b-2 may be simultaneously observed. That is, when moving from one image to the next image, or when moving to the next image, a thin image due to the adjacent compressed image 82b is observed as a ghost (leakage image).

The reason for this is that when a compressed image is formed,
It is considered that the compressed image is formed to protrude in the horizontal direction on the image sheet 82. As described above, conventionally, the separation between adjacent images is insufficient. However, such ghosts do not pose a significant problem when viewed as a stereoscopic image, for example.
However, when a plurality of continuously shot images are sequentially observed, for example, ghosts tend to be conspicuous, resulting in a problem of deterioration in image quality due to insufficient separation between images.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an image display apparatus using a lenticular lens, in which the separation between images is sufficiently performed and the image quality is further improved. And

[0007]

According to a first aspect of the present invention, there is provided an image display apparatus configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses. The image display method according to claim 1, wherein a band-shaped buffer region is provided between the compressed images adjacent to each other with respect to the compressed image formed on the image sheet corresponding to one lenticular lens, and the adjacent compressed images are displayed on the lenticular lens. When viewed from a continuously changing viewpoint position via the screen, the two images of the compressed images are displayed so as to be observed separately from each other due to the presence of the buffer region.

According to a second aspect of the present invention, there is provided an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses. For a compressed image formed on the image sheet corresponding to the lenticular lens, between adjacent compressed images, a band-shaped buffer region for separating two images by the compressed images from each other is provided. .

In the apparatus according to a third aspect of the present invention, an image having an intermediate density between the densities of the adjacent compressed images is formed in the buffer area. In the apparatus according to a fourth aspect of the present invention, an image including pixels having a density intermediate between the densities of the respective pixels of the compressed image adjacent to each other is formed in the buffer area.

[0010] In the apparatus according to the fifth aspect of the present invention, an image in which the density of the high-density compressed image of the adjacent compressed images is reduced is formed in the buffer area.
In the apparatus according to the sixth aspect of the present invention, in the buffer area, an image is formed in which the density of the compressed image on the higher density side of the compressed images adjacent to each other is reduced at a fixed rate.

[0011] In the apparatus according to the present invention, in the buffer area, a pixel having a density higher than a predetermined value of a compressed image on a higher density side among the compressed images adjacent to each other is provided.
An image composed of pixels whose density is lowered is formed.

In the apparatus according to the present invention, a low-density one-color image is formed in the buffer area. In the device according to the ninth aspect, the width of the buffer region is
It is variable so as to increase according to the density of the compressed image adjacent to the buffer area.

According to a tenth aspect of the present invention, there is provided an apparatus for producing an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses. An original image storage means for storing image data of a plurality of original images, a compressed image generating means for generating image data of a plurality of band-shaped compressed images for each original image, and a generated compressed image And an arrangement means for providing a buffer area between each of them as necessary and developing them on a memory or printing them on paper to form them on an image sheet.

An apparatus according to an eleventh aspect of the present invention is an apparatus for producing an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses. An original image storage unit for storing image data of a plurality of original images; a compressed image generation unit for generating image data of a plurality of band-shaped compressed images for each of the original images; Means for forming a buffer area image for arranging the compressed image and the buffer area image on a memory comprising a pixel having an intermediate density between the density of each pixel of the image and the compressed image; And an arrangement means for forming on an image sheet by printing on the image sheet.

The buffer area is often provided separately from the area of the compressed image, but may be a part of the area of the compressed image. That is, the compressed images may be arranged without gaps, and a portion near the boundary between the compressed images may be used as the buffer area. That is, even in the case of an image or data based on a compressed image, an area where processing for separating adjacent compressed images has been performed is included in the concept of the buffer area in the present invention.

[0016]

FIG. 1 is an enlarged sectional view showing a part of an image display device 1 according to the present invention. 1A, an image display device 1 includes an image sheet 12 on which a band-shaped compressed image 12b of a plurality of images is formed, and a lenticular screen 1 disposed on the image sheet 12.
One. The lenticular screen 11 includes a plurality of lenticular lenses 11a.

As shown in FIGS. 1B and 1C, a number equal to the number of images, that is, seven compressed images 12b in this example is formed below one lenticular lens 11a. Each of the compressed images 12b is an image obtained by, for example, horizontally compressing an image obtained by dividing an original image into a band shape. To create the compressed image 12b itself, refer to Japanese Patent Application Laid-Open Nos. 2-293733 and 6-309.
No. 431, JP-A-9-236875, Japanese Patent Application No. 8-21
Various methods disclosed in No. 9615 and the like are applied.
In this specification, for these compressed images 12b,
As shown in FIG. 1C, 12b-1, 12b-2, 1
Numerals 1 to 7 may be added to the end, such as 2b-3.

These compressed images 12b are not formed so as to be tightly spaced from each other, but a band-shaped buffer area 21a is provided between the compressed images 12b adjacent to each other. As shown in FIG. 1C, numerals may be added to the end of the buffer area 21a, such as 21a-1, 21, 21a-2, 21a-3,.

In the buffer area 21a, an image having an intermediate density between the densities of the compressed images 12b adjacent to each other is formed. In that case, such a density can be obtained for each pixel in the buffer area 21a, and an image can be formed with the density determined for each pixel. Further, such a density can be obtained for each of a plurality of pixels in the buffer area 21a, and an image can be formed with the density determined for each of the plurality of pixels. Also,
Such a density is obtained for the entire buffer region 21a or for each divided portion of the buffer region 21a, not for each pixel or a plurality of pixels, and an image is formed with the entire buffer region 21a or each portion having the same density. be able to.

In order to determine the density of the buffer area 21a, the density of both or one of the adjacent compressed images 12b can be used as a reference. In addition, in order to obtain the density of the buffer area 21a, the density of the entire compressed image 12b as a reference, the density of only the portion near the buffer area 21a, or the density of only the pixels in contact with the buffer area 21a are used. be able to.

As a method of calculating the density of the buffer area 21a, a method of calculating an average value of both densities of the adjacent compressed images 12b, and a method of determining the density of the compressed image 12b on the higher density side of the adjacent compressed images 12b. , A method of calculating by subtracting a predetermined density value from the density of the compressed image 12b on the higher density side of the adjacent compressed image 12b, and the higher the density, the greater the rate of reduction in density. And a method for preventing the density from lowering when the density is lower than a predetermined value, and a method combining these methods.

As a method of determining the color of the image formed in the buffer area 21a, a method of setting an achromatic gray scale according to the density, a method of setting the same color as the color of the compressed image 12b, and a method of determining two adjacent compressions There is a method of setting an intermediate hue between the colors of the image 12b.

The buffer area 21a may be formed of a low-density color, for example, a single color image of white or an achromatic or chromatic color close to white. The width dimension of each buffer area 21a is the same as each other, and is formed smaller than the width dimension of each compressed image 12b. Further, the width of each buffer area 21a may be different from each other, and may be the same as the width of each compressed image 12b.

The compressed image 12b and the buffer area 21a
Are formed on the image sheet 12 by various methods described below as an example. The image sheet 12 is photographic paper, and is formed by printing a compressed image 12b on photographic paper by photographic printing. The buffer area 21a is formed by providing a gap between the compressed images 12b. Normally, the buffer area 21a
Is an unexposed portion. The image sheet 12 is plain paper, and a compressed image 12b is formed by letterpress printing or screen printing.
In the buffer area 21a, images having the densities obtained by the various methods described above are printed. That is, the compressed image 12b and the image of the buffer area 21a are created on the master for printing. The image sheet 12 is plain paper, and a compressed image 12b is formed by letterpress printing or screen printing.
No printing is performed on the buffer area 21a, and the buffer area 21a becomes the background color of the image sheet 12. The image sheet 12 is plain paper, and is formed by printing a compressed image 12b by a printer device controlled by a computer. Printing methods include a thermal transfer method, an ink jet method, and an electrophotographic method. When the image sheet 12 is a thermal paper, a thermal system is adopted.

In this case, the data of the compressed image 12b is
The compressed image 12b is created by converting data created in advance as such a compressed image 12b into data, or by performing image processing on the original image data by a computer.

The buffer area 21a can be formed by controlling the print position of the data of the compressed image 12b. Further, by a computer, by calculating or processing based on the various methods described above to determine the density or hue,
An image for the buffer area 21a can be created.

When the original image, that is, the image finally obtained is based on computer graphics, the data itself of the compressed image 12b can be created by a computer. In this case, an image of the buffer area 21a is also created at the same time. When the printer device develops one page of image data in an image memory such as a page printer, the created compressed image 12b and the buffer area 21a are stored in such an image memory. Will expand. The image sheet 12 is a display surface of a display device (display device), and a compressed image 12b and a buffer region 21a are formed by sending image data from the computer to the display device. In this case, the computer creates image data of the compressed image 12b and the buffer area 21a.

In the above case, the minimum value of the width of the buffer area 21a is determined by the printing density of the printer. For example, if the print density in the width direction is 40
In the case of a 0 dpi printer device, since the resolution is about 64 microns, the minimum value of the width of the buffer area 21a is about 64 microns. In the case of a 300 dpi printer device, the minimum value of the width of the buffer region 21a is about 85 microns.

For example, when forming a compressed image 12b of four images using a 300 dpi printer,
Assuming that the width dimension of one compressed image 12b is equal to the resolution, the total width required for that is approximately 339 ({24.4}).
300 × 4) microns. Therefore, each compressed image 12
When a buffer region 21a having a width dimension equal to the resolution is formed between b, the total width of such a buffer region 21a is about 25
4 (≒ 24.4 ÷ 300 × 3) microns.

Therefore, in this case, the minimum value of the width dimension of the lenticular lens 11a, that is, the minimum pitch of the lenticular lens 11a is about 593 (≒ 339 + 2).
54) Micron. One lenticular lens 1
Compressed image 12 formed below lenticular lens 11a adjacent to group of compressed images 12b formed below 1a
When a gap is provided between the lenticular lens 11a and the group b, the sum of the size of the gap is the pitch of the lenticular lens 11a.

Therefore, for example, by providing each compressed image 12b with a width dimension equal to the resolution of the printer device (that is, a size of one pixel) and providing the buffer region 21a with a width dimension also equal to the resolution of the printer device as a gap. The display device 1 can be created. Alternatively, the width of the compressed image 12b may be an integral multiple of the resolution, and the width of the buffer region 21a may be equal to the resolution or an integral multiple of the resolution. The image data of various densities obtained as described above and image data of white or black may be allocated to the buffer area 21a.

In particular, when the compressed image 12b is printed by an ink jet method or the like, the ink is applied to the image sheet 1b.
2, the interference or crosstalk between the compressed images 12b is likely to occur. Therefore, in this case, the buffer region 2
It is desirable to provide 1a and increase its width.

If the precision of the lenticular lens 11a is good and the compressed image 12b does not protrude in the width direction when forming the compressed image 12b, the separation between the images may be sufficiently performed without providing the buffer region 21a. . Further, even if the separation between images is not sufficiently performed, when the density of the image is low, the ghost is not so conspicuous and the image quality may not be a problem. Therefore, the presence / absence, width size, color, and the like of the buffer region 21a can be changed according to those conditions, instead of always providing the buffer regions 21a at equal intervals.

For example, when the compressed image 12b is an image having a relatively high contrast, the width of the compressed image 12b may be reduced to increase the width of the buffer area 21a. For example, the contrast of the compressed image 12b is low,
If a ghost is difficult to appear, the buffer area 21a is eliminated or its width dimension is minimized. If the contrast is high and ghosts are likely to appear, a buffer area 21a is provided,
Alternatively, the width is increased.

In such a case, the degree of contrast or the degree of shading of the compressed image 12b is determined by a computer, and if necessary, the presence or absence of the buffer area 21a, its width, and the density of the image formed thereon are determined. And hue can be automatically controlled.

That is, in this case, when, for example, four compressed images 12b are formed under one lenticular lens 11a, there may be a case where there is a buffer area 21a between the compressed images 12b and a case where there is no buffer region 21a. It will be.
Further, the width dimensions may be different from each other.

For example, a white line is used as the buffer area 21a, and between a pattern where such a buffer area 21a needs to be provided and a pattern which does not need to be provided is determined by a program. May be inserted into the buffer area 21a.

The compressed image 12 for one image
By setting the total width dimension of the buffer area 21a to be the same as that of the buffer area 21a, even if the width dimension of the buffer area 21a is changed, the image of the compressed image 12b can be observed at the same position by the observer. Becomes That is, in this case, the total width dimension of the compressed image 12b and the buffer area 21a assigned to one image is set to be the same, and the compressed image 12b and the buffer area 21a are assigned to each image.
Will be controlled.

Next, the compressed image 12b and the buffer area 21a
Image forming apparatus 3 using a computer
An example in the case of creating by the following will be described. FIG. 2 is a block diagram of the compressed image forming apparatus 3, FIG. 3 is a view showing a process of forming a compressed image FP by the compressed image forming apparatus 3, FIG. 5 is a flowchart showing a procedure for creating a stereoscopic photograph SPT using the compressed image forming apparatus 3.

As shown in FIG. 2, the compressed image forming apparatus 3
Is composed of a processing device 40, an image scanner 41, a PC card interface 42, a serial interface 43, a keyboard 44, a mouse 45, a magnetic disk device 46, a display device 47, and a printer device 48. A magneto-optical disk, a DVD, and the like are also connected as needed.

The image scanner 41 is for reading an image such as a photograph. The pixel density for reading can be, for example, about 300 to 1200 dpi. The PC card interface 42 is for inputting image data obtained by photographing with a digital camera (not shown) by connecting a PC card.

The serial interface 43 is directly connected to a digital camera (not shown) by a cable and inputs image data obtained by photographing. The keyboard 44 is for inputting commands or data to the processing device 40, and the mouse 45 is for inputting commands or data by clicking a button displayed on the screen of the display device 47.

The magnetic disk device 46 stores input image data, edited image data, reduced image data, compressed image data, and the like.
Stores programs executed in the processing device 40 and the like.

The display device 47 displays the input image, the edited image, the compressed image, and the like on the screen HG, and the printer device 48 prints those images on paper. The processing device 40 controls the above-described peripheral devices to control input / output of data, and processes the input data. Processing unit 4
In 0, a reduction processing unit 101, an editing processing unit 102, an expansion processing unit 103, a division processing unit 104, an arrangement processing unit 105, and a RAM 106 are provided.

The reduction processing section 101 reduces image data at a specified reduction ratio. The editing processing unit 102 performs image editing processing such as image rotation, mirror conversion, color conversion, character insertion, image cut-and-paste, and image synthesis on image data.

The expansion processing section 103 expands the image data at a specified magnification. The division processing unit 104 divides the image data along the horizontal direction, and generates a linearly elongated linear partial image in the vertical direction.

The arrangement processing unit 105 arranges and writes the image data of the partial images on the RAM 106 in a predetermined order, and generates a compressed image. At this time, a buffer area is created if necessary, and this is written in the RAM 106 together with the compressed image.

The RAM 106 is a work area for performing the various processes described above, and is also a bit map memory in which a compressed image and a buffer area are expanded. Note that, as the compressed image forming apparatus 3, for example, a personal computer or a workstation in which an appropriate program is installed is used. The above-described functions of the processing device 40 can be realized by executing a program stored in the ROM or the RAM.

Next, an operation or a process for forming a compressed image FP for a three-dimensional photograph from a plurality of photographs using the compressed image forming apparatus 3 will be described with reference to FIGS. Here, the number of photos is “3”, but 2 or 4
More than one sheet may be used.

First, three photographs PA, PB, and PC having different parallaxes are prepared as raw images. Such a photo P
A, PB, and PC can be created by photographing a subject with a known stereoscopic camera described in, for example, Japanese Patent Application Laid-Open No. 8-54694, and printing it on photographic paper. Also, various image images created using computer graphics may be used.

The images of the photographs PA, PB and PC are read by the image scanner 11 to obtain raw image data DPA, DPB and DPC as shown in FIG. 3 (# 1). The obtained raw image data DPA, DPB, DPC are stored in the magnetic disk device 46.

In FIG. 3, the raw image data DP
Only the outer frames of A, DPB, and DPC are displayed, and an image exists in those frames. However, illustration of the image itself is omitted.

Next, these raw image data DPA, DP
B and DPC are reduced vertically and horizontally to, for example, 1/5. That is, the area ratio is reduced to 1/25. As a method of reduction,
Various known methods such as a data thinning method are used.
Thus, reduced image data DA, DB, and DC are obtained (# 2).

Image editing is performed on the image data DA, DB, DC to obtain edited image data DEA, DEB, DEC (# 3). As the image editing, various known edits such as color conversion, insertion of characters, cut and paste of an image, and synthesis of an image are possible.

The image editing is performed by displaying the original image and the image in the editing process on the screen HG of the display device 47, and operating the keyboard 44 or the mouse 45 while looking at the image. Edited image data DEA, DEB, DE
C is stored in the magnetic disk drive 46.

Next, each of the edited image data DEA, DEB,
The DEC is extended, for example, six times in the vertical direction. Various known methods such as a data interpolation method are used as a method of decompression. Thereby, the expanded image data DXA, DXB, D
XC is obtained (# 4).

Each expanded image data DXA, DXB, DXC
Is divided along the horizontal direction, and a large number of band-shaped partial image data (compressed image data) DTA, DTB,
Generate DTC. That is, for example, one piece of decompressed image data DXA is converted into a number of partial image data DTA, DTA, D
TA ... are obtained (# 5). In this division, what ratio is divided, that is, one partial image data DT
How the width of A is determined depends on the size of the image printed on the paper based on the partial image data DTA, DTB, and DTC, the width of the lenticular lens, the resolution of the printer device 48, and the like. I do.

The generated partial image data DTA, DTB,
DTCs are arranged one by one in this order.
Written to M106. At this time, buffer areas BA, BB, and BC having the same width dimensions are inserted between the respective partial image data DTA, DTB, and DTC (#
6). The image written and generated in the RAM 106 is the compressed image FP.

Note that the partial image data DTA, DTB, D
When arranging TCs, the degree of each contrast may be determined to determine whether or not buffer areas BA, BB, and BC are required. If it is determined that the buffer region is unnecessary, the width of the partial image data may be enlarged and arranged by the buffer region, or the partial image data may be repeatedly disposed.

The compressed image FP is printed on the paper PP by the printer device 48 (# 7). By mounting and fixing the lenticular screen LS in close contact with the printed paper PP, a stereoscopic photograph SPT is obtained (#
8).

As shown in FIG. 4C, a three-dimensional photograph SPT
Under one lenticular screen LS, partial compressed images FPA, FPB, FPC based on three partial image data DTA, DTB, DTC are formed with buffer areas BA, BB, BC interposed therebetween.

Therefore, when the observer views the stereoscopic photograph SPT, for example, the partially compressed image FPA can be seen with the left eye,
By seeing the partially compressed image FPB with the right eye, it is seen that the photographs PA and PB having different parallax between the left and right eyes, and a stereoscopic effect is obtained. Partial image data DTA, DT
Since there are buffer areas BA, BB, and BC between B and DTC, no crosstalk occurs between the partial image data DTA, DTB, and DTC, and a good image quality can be obtained.

If the three pictures PA, PB, and PC are not pictures having different parallaxes but are images having different contents or a plurality of continuous shot images, a compressed image FP is created in the same manner. be able to. In this case, the image is obtained by moving the compressed image FP of FIGS.
It is formed so as to be observed at a position rotated by degrees. Also,
The observation is performed such that the direction of the lenticular lens of the lenticular screen LS matches the direction in which both eyes are arranged.

In the above example, the photographs PA, PB, P
The raw image data DPA, DPB, and DPC obtained by reading the image of the C by the image scanner 41 are reduced to obtain image data DA, DB, and DC. Image data DA, DB, and DC may be directly obtained. When the external dimensions of the photographs PA, PB, and PC are small, it is also possible to directly obtain the image data DA, DB, and DC.

The image data DA, DB, and DC obtained by photographing with the digital camera may be directly input by the PC card interface 42 or the serial interface 43. Also, image data DA, DB,
The DC may be input by reading from various recording media, or may be input via a communication line.

In the above three-dimensional photograph SPT, the partially compressed images FPA, FPB, F under each lenticular lens
The positions of the PC and the buffer areas BA, BB, and BC are determined in consideration of the projection angle of the lenticular lens in Japanese Patent Laid-Open No. 6-30 / 1994.
As shown in U.S. Pat. No. 9,431, it may be shifted according to the position of the lenticular lens.

In the above-described embodiment, the number and arrangement positions of the compressed image 12b and the buffer region 21a for one lenticular lens 11a, the ratio of the width to each other,
Color or number of photos PA, PB, PC, reading density,
Reduction ratio, number of image data DA, DB, DC, number of pixels,
Edit contents, expansion ratio, partially compressed images FPA, FP
The arrangement positions of the B and FPCs, the width dimensions of the buffer areas BA, BB, and BC, the configuration of the whole or each part of the compressed image forming apparatus 3, and the contents or order of processing can be appropriately changed in accordance with the gist of the present invention. it can.

[0068]

According to the present invention, in an image display device using a lenticular lens, separation between images can be sufficiently performed, and the image quality can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an image display device according to the present invention.

FIG. 2 is a block diagram of a compressed image forming apparatus.

FIG. 3 is a diagram illustrating a process of forming a compressed image by the compressed image forming apparatus.

FIG. 4 is an enlarged view showing a part of a compressed image.

FIG. 5 is a flowchart illustrating a procedure for creating a stereoscopic photograph using the compressed image forming apparatus.

FIG. 6 is a diagram showing a conventional image display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image display apparatus 3 Compressed image forming apparatus 11 Lenticular screen 11a Lenticular lens 12 Image sheet 12b Compressed image 21a Buffer area 46 Magnetic disk device (original image storage means) 103 Decompression processing section (partial image generation means) 104 Division processing section (partial) Image generation means) 105 Arrangement processing unit (Arrangement means) DA, DB, DC Image data (Image data of original image) FP Compressed image

Claims (11)

[Claims] 1. An image display method in an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses, wherein the method corresponds to one lenticular lens. Then, for the compressed image formed on the image sheet, a band-shaped buffer area was provided between the compressed images adjacent to each other, and the adjacent compressed images were observed from the continuously changing viewpoint position via the lenticular screen. An image display method using a lenticular lens, wherein the two images of the compressed images are sometimes displayed so as to be observed separately from each other due to the presence of the buffer region. 2. An image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses, wherein the image corresponds to one lenticular lens. A lenticular lens, wherein a band-shaped buffer region for separating two images by the compressed images is provided between the compressed images adjacent to each other with respect to the compressed images formed on the sheet; Image display device using the same. 3. The image display device using a lenticular lens according to claim 2, wherein an image having a density between the densities of the adjacent compressed images is formed in the buffer area. 4. An image display device using a lenticular lens according to claim 2, wherein an image composed of pixels having a density intermediate between the densities of the respective pixels of the compressed image adjacent to each other is formed in said buffer area. 5. The lenticular lens according to claim 3, wherein an image in which the density of the high-density compressed image of the adjacent compressed images is low is formed in the buffer area. Image display device used. 6. The buffer region according to claim 3, wherein an image in which the density of a high-density compressed image of adjacent compressed images is reduced at a fixed rate is formed. An image display device using the described lenticular lens. 7. An image comprising pixels whose density is lower than a predetermined value of a compressed image on a higher density side of the compressed images adjacent to each other is formed in the buffer area. An image display device using the lenticular lens according to claim 3. 8. An image display apparatus using a lenticular lens according to claim 2, wherein a low-density one-color image is formed in said buffer area. 9. The lenticular lens according to claim 2, wherein a width dimension of said buffer region is changed so as to increase in accordance with a density of a compressed image adjacent to said buffer region. Image display device. 10. An apparatus for producing an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses, the apparatus comprising: a plurality of original images; Original image storage means for storing image data for each of the following; compressed image generating means for generating image data of a plurality of band-shaped compressed images for each original image; Arranging means for forming an image on a sheet by providing a buffer area as needed and developing on a memory or printing on paper; and Device creation device. 11. An apparatus for producing an image display device configured to observe a compressed image formed on an image sheet through a lenticular screen including a plurality of lenticular lenses, the apparatus comprising: a plurality of original images; Original image storage means for storing image data for each of the following; compressed image generation means for generating image data of a plurality of band-shaped compressed images for each original image; Means for forming a buffer area image for arranging the compressed image and the buffer area image, wherein the compressed image and the buffer area image are developed on a memory or printed on a sheet of paper. An apparatus for producing an image display apparatus using a lenticular killer lens, comprising: an arranging means formed thereon;