JPH04280377A - Picture display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device that restores and displays encoded image data, and more particularly to an image display device that can perform image searches efficiently.

0002

[Prior Art] Image data, especially halftone image and color image data, has a larger amount of information than character and numerical data.
Since the amount of data (data amount) is orders of magnitude larger, in order to store the data or transmit it at high speed and quality, it is necessary to encode the tone values of each image with high efficiency.

[0003] In addition, when searching an image database, etc., in order for the user to more quickly recognize the outline of the image,
Efficient image retrieval is possible using so-called hierarchical restoration (this hierarchy is classified according to image resolution), which gradually improves the image quality from coarse images that can be displayed quickly to high-quality images. It is strongly desired to realize a possible image restoration method. When searching for images, image display allows you to search for images without the discomfort of searching for a desired image, just like searching for a page in a book by flipping through the pages of a book to find the desired page. The demand for this is extremely strong.

By the way, as a highly efficient compression method for image data, for example, adaptive discrete cosine transform (Adaptive Discrete Cosine Transform) is used.
e Discrete Cosine Transform
rm (hereinafter abbreviated as ADCT) encoding method is known.

[0005] This ADCT encoding method uses, for example, 25
Two-dimensional original image data sampled into 6 x 256 pixels or 512 x 512 pixels, etc. is divided into multiple blocks of, for example, 8 x 8 pixels (or 16 x 16 pixels), and the image signal of each block ( (gradation value or density value, etc.) to 2
dimensional discrete cosine transform (2-dimensional Discrete C
osine transform (hereinafter abbreviated as two-dimensional DCT) into spatial frequency distribution coefficients, the coefficients are quantized using a threshold value adapted to visual perception, and the obtained quantized coefficients are encoded using a statistically obtained Huffman table. It is something that becomes.

FIG. 7 shows a basic block diagram of a circuit that divides the image signal 23 into blocks of 8×8 pixels and encodes and stores the image signal of each block by ADCT.
The encoding operation will be explained with reference to FIG.

First, a pixel signal 23 of 64×64 pixels is divided into 8×8 blocks each consisting of 8×8 pixels, as shown in FIG. 8, and is input to a two-dimensional DCT transform unit 24. Note that the values of each block shown in FIG. 9 indicate gradation values.

The two-dimensional DCT transform unit 24 orthogonally transforms the input image signal of each block by two-dimensional DCT to obtain two-dimensional DCT coefficients F(u
, v), (0≦u≦7, 0≦v≦7) and output to the linear quantization unit 25. Two-dimensional DCT coefficient F(u,v)
A smaller value of u or v represents a spectral component with a lower spatial frequency and a lower resolution, and a larger value of u or v represents a spectral component with a higher spatial frequency and a higher resolution. Further, F(0,0) indicates a DC component.

The linear quantization unit 25 linearly quantizes the input two-dimensional DCT coefficients F(u,v) with reference to a quantization matrix 26 consisting of threshold values determined through visual experiments. As a result of this quantization, as shown in FIG.
The two-dimensional DCT coefficient F(u,v) below the threshold becomes 0,
A quantized coefficient is generated in which only a DC (direct current) component ("5") and a few AC alternating current components have values.

Next, the quantized coefficients arranged two-dimensionally as shown in FIG. 10 are 1, 2, 3,
. . 61, 62, 63, 64 in the numerical order, the data is converted into a one-dimensional data string and input to the variable length encoding unit 27.

[0011] Regarding the DC component, the variable length encoding unit 27 performs variable length encoding on the difference between the DC component and the DC component of the previous block. Furthermore, for the AC component, the values of effective coefficients (coefficients whose value is not 0) and the run length (zero run length) of invalid coefficients (coefficients whose value is 0) up to that point are variable-length encoded. And then D
Each of the C and AC components is encoded using a code table 28 consisting of a Huffman table created based on statistics for each image, and stored in a code data storage section 29. At this time, the code data includes data necessary to restore a coarse image in the first layer, data to be added sequentially to restore a coarser image in the second layer, third layer, and so on. is stored in the form of hierarchical code data. That is, the order (u, v) of the two-dimensional DCT coefficient F (u, v)
The data are divided and stored hierarchically in order of the components corresponding to the lowest spatial frequencies.

[0012] In this way, code data stored in layers is sequentially restored from a lower layer to a higher layer, that is, from a coarse image to a finer image. By the way, as mentioned above, all the pixels of the sampled image are divided into a plurality of blocks each consisting of an appropriate number of pixels, and for each block, the numerical sequence consisting of the sampled values is orthogonally transformed using two-dimensional DCT, etc. , obtaining a number of coefficients equal to the number of blocks and quantizing the coefficients according to a predetermined rule is generally called transform coding or block coding.

A method for restoring an image from this hierarchical coded data will be explained with reference to circuit blocks shown in FIGS. 12 and 13. FIG. 12 is a diagram showing the configuration of a conventional apparatus for restoring an image from hierarchical code data (hierarchical code data).

In the prior art, first, the hierarchical code data of a large number of images stored in the code data storage unit 110 shown in FIG.
Sequential selection is made in order of hierarchy from the code data of the hierarchy. The first layer encoded data of the first image selected by the image selection section 120 is output to the image restoration section 130, and is restored into an image signal by the image restoration section 130. The restored image signal is then displayed on the image display section 140.

As described above, after the first layer encoded data of the first image has been restored to an image signal, the image selection section 120 then restores the second layer encoded data of the first image in the encoded data storage section 110. Code data is selected, and an image more detailed than the previous image is restored using the first layer code data and the second layer code data using the same procedure as described above.

Here, the image restoration section 13 shown in FIG.
0, the image restoration unit 130
Explain the operation. The image restoration unit 130 first restores the coded data of the first layer of the first image. That is,
First, the code data of the first layer of the first image is read from the code data storage unit 110 into the variable length decoding unit 131 in order from the first block, and the variable length decoding unit 131 refers to the decoding table 132 and performs the following steps: Fixed length data (2D DC
T coefficient). The two-dimensional DCT coefficients restored by the variable length decoding unit 131 are dequantized by the dequantization unit 133 using the quantization matrix 134, and the quantized coefficients obtained by the dequantization are stored in the coefficient storage unit 135. Stored. Each value in the coefficient storage section 135 is given an initial value of zero. Therefore, only the coefficients restored to non-zero values by the variable length decoding unit 131 and quantized by the dequantization unit 133 are newly written into the coefficient storage unit 135. After all code data of the first layer of the first image is read and variable length decoding is completed, each coefficient (quantized coefficient) of the first layer of the first image stored in the coefficient storage unit 135 is subjected to inverse DCT. The conversion unit 136 calculates and converts it into gradation data (image signal), which is displayed on the image display unit 140.

After the first layer encoded data of the first image is restored as described above, all the subsequently transmitted encoded data of the second, third, . . . layers are sequentially restored. Then, after restoring the code data of all layers for the first image, the second image is sequentially restored starting from the first layer using the same procedure.

[0018] In this way, images equal to the number of layers are displayed for each of the first, second, . After that, the display shifts to the first layer of the next image.

[0019]

[Problems to be Solved by the Invention] As mentioned above, conventionally, each image is transform-encoded, and the coded data obtained by the transform-encoder is hierarchically layered so that finer images are obtained sequentially from coarser images. I remembered it. Then, by sequentially restoring each image in the order of the first layer, second layer, etc., each image is sequentially restored and displayed from a coarse image to a finer image.

However, in this restoration/display, after the previous image is restored/displayed, the next image is restored/displayed on the same screen, so each image is presented independently. Ta. For this reason, there have been drawbacks such as the inability to realize a natural image search that is familiar to humans, such as searching while turning the pages of a book.

[0021] An object of the present invention is to realize an image display device that allows a user to efficiently search for a desired image with a natural feeling similar to turning the pages of a book.

[0022]

[Means for Solving the Problems] FIG. 1 is a diagram illustrating the principle of the present invention. The present invention is based on an image display device that restores and displays encoded image data.

The restoring means 1 performs the above-mentioned encoding and inverse transform processing on image data encoded by various orthogonal transformations, etc., and restores it to image data for display. At this time, the encoded image data is stored in a hierarchical manner so as to be displayed in stages from coarse images to finer images so that, for example, an image database can be searched efficiently.

The display position moving means 2 changes the display position of the display image data that has been restored by the restoring means 1 so that the image obtained by the display image data is moved and displayed on the screen. . This change can be done by e.g.
As set forth in claim 3 or 5, the image data for displaying the restored previous image is configured for displaying the previous image so that the previous image is displayed while being moved horizontally or vertically on the screen. This is a process that changes the display position of image data.
In this case, for example, as described in claim 4 or 6, the changing process is performed two or more times. Further, in the above-mentioned changing process performed twice or more, for example, as described in claim 7, the display position of the previous image is displayed such that the amount of movement of the display position of the previous image changes for each change process. Change the display position of the image data.

The display control means 3 also controls a new image obtained by the display image data of the next image newly restored by the restoration means 1 to be obtained by the display image data created by the display position moving means 2. Control is performed so that the previous image and the moving image are combined and displayed. In this composite display, for example, a new image obtained by the display image data newly restored by the restoration means 1 as described in claim 2 is replaced by the display image data created by the display position moving means 2. Control is performed so that only the portion of the obtained previous image corresponding to the display area where the moving image is not displayed is displayed.

Further, the display control means 3 is configured to display the previous image obtained from the display image data created by the display position moving means 2 and the display image data newly restored by the restoring means 2. Control is performed so that at least one of the new images obtained is displayed with a border. Further, as described in claim 9, a new image is obtained from a moved image of the previous image obtained by the display image data created by the display position moving means 2 and display image data newly restored by the restoring means 1. control so that the brightness of the data is displayed differently.

[0027]

[Operation] When the restoring means 1 receives encoded image data, it performs an inverse transformation of the encoding and restores the image data from the encoded data. At this time, if the encoded data is stored (stored) in layers such as the first layer, second layer, etc. so that the code data is restored and displayed from a coarse image to a finer image, the first layer code data, second layer code data,
. . . The image data is restored in hierarchical order. When the restoration and display of the first image is completed, restoration of the image data of the next second image is started.

The display image data of the first image restored and completed by the restoration means 1 is output to the display control means 3 and also to the display position moving means 2. The display position moving means 2 changes the display position of the restored and terminated display image data of the first image so that the first image is moved and displayed, for example, in the horizontal or vertical direction. do. This process of changing the display position is performed multiple times, for example, while changing the amount of movement stepwise linearly or non-linearly. The display image data of the previous image that has been subjected to the display position change process is sequentially output to the display control means 3 each time each change process is completed.

In this way, the display position moving means 2 moves the display image data of the previous image whose display position has been changed.
While sequentially outputting the image data to the display control means 3, the restoration means 1 starts restoring the image data of the next second image, and transfers the display image data of the restored second image to the display control means 3.
Output to.

The display control means 3 displays the display image data inputted from the display position moving means 2 and the display position of which has been changed for the first image (previous image) which has already been restored and displayed, and the restoring means. The image data for display of the newly restored second image (new image) input from 1 is combined and displayed on the screen. In this composite display, for example, priority is given to the moving display of the previous image, and in an area where the moving image of the previous image is not displayed, a portion of the new image corresponding to that display area is displayed.

The above-described operations are repeated in sequence for the second image, the third image, and so on. Therefore, the display position moving means 2 sequentially changes the display position of the display image data that has been restored and completed by the restoring means 1, for example, in the horizontal or vertical direction at a predetermined rate (which may be non-linear). By repeating this multiple times while changing the image, an image can be created in which the entire new image is gradually displayed while the previous image is sequentially moved to the right or left of the screen, as shown in FIG. 5 or 6. Display becomes possible. Furthermore, Figures 5 and 6
, image A is the previous image and image B is the new image.

[0032]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing the system configuration of an image display device according to an embodiment.

In the same figure, as mentioned above, one image is stored in the code data storage unit 210 in the form of, for example, M×M (for example, M
= 256 or M = 512) pixels, and the image signal of each pixel obtained by sampling it into N x N (for example, N = 8 or N =
16) Divide into multiple blocks consisting of pixels, and divide the image data of each block f(m, n) (m=0, 1,...N-
1; n=0, 1, . . . N-1) using the two-dimensional DCT is classified and stored for each layer as described above.

[0034] For encoding using this two-dimensional DCT, various methods as shown below are applied. ■ The DC component is DPCM (Differentia) with the previous block.
ADCT encoding method performs two-dimensional Huffman encoding of zero run length and non-zero coefficient values by zigzag scanning the AC component. ■ Low-frequency components are encoded using inter-frame/intra-frame adaptive prediction DPCM, and high-frequency components are directly encoded using two-dimensional DCT. ■ Both DC and AC components are two-dimensional DC
A method of encoding with T.

The image restoration section 220 first inputs code data of the first layer of the first image from the code data storage section 210. The configuration of this image restoration section 220 is shown in FIG.

As shown in the figure, this image restoration section 220
The block configuration of the image restoration unit 130 shown in the above-mentioned figure is
It has the same configuration as the code data storage section 21.
The layered code data of an arbitrary image selected from 0 and read out is sent to the variable length decoding unit 2 in order from the first block in the image.
21 and is restored to fixed length data (two-dimensional DCT coefficients) using a decoding table 222. The two-dimensional DCT coefficients restored by the variable length decoding unit 222 are
The dequantization unit 224 dequantizes the quantization coefficients using the quantization matrix 225, and the resulting quantized coefficients are stored in the coefficient storage unit 226. Each value in the coefficient storage section 226 is
The initial value is zero. Therefore, the variable length decoding unit 223 restores the value to a value other than zero, and the dequantizing unit 224
Only the quantized coefficients dequantized in step 2 are newly written into the coefficient storage section 225. Then, after reading all the encoded data of the first layer of an arbitrary image and completing variable length decoding, an inverse DCT transform unit applies each coefficient of the first layer of the arbitrary image stored in the coefficient storage unit 225. Inverse 2D DCT with 226
The data is converted into gradation data, and the gradation data is written into the image storage unit 230 as image data.

Thereafter, the image restoration unit 220 similarly restores the image data of the second, third, . . . , higher hierarchy, and stores the restored image data in the image storage unit
Write it down to 30.

In this way, the image data of the first, second, third, .
It is output to 0 and displayed. Therefore, each image is restored and displayed in stages from a coarse image to a finer image.

By the way, as described above, the display control section 2
After an arbitrary image is restored and displayed on the image display unit 270 via the image display unit 40 up to a necessary layer (for example, the final layer or an image on a layer that can be recognized by the user), the image data of the final restoration of the arbitrary image is displayed. Further, the moving image storage unit 250
After being processed by the movement calculation unit 260 to be displayed while being translated in parallel on the screen, it is output to the display control unit 240. At this time, the restored image data of the first layer of the next image is output to the display control unit 240. The display control unit 240 combines the parallel movement image data of the previous image that has already been restored and displayed, which is input from the movement calculation unit 260, and the first layer image data of the next image, which is input from the image storage unit 230, The combined image data is output to the image display section 270. Therefore, when an arbitrary image is restored and displayed on the image display unit 270 up to the required layer, the next image that has been restored and processed in parallel with the previous image and the first layer of the next new image are displayed. A composite image with the image is displayed. Note that in this composite display, the display control unit 240
gives priority to the image data input from the movement calculation unit 260, and places the corresponding part of the new image corresponding to the image data input from the image restoration unit 270 in an area where the movement image of the previous image corresponding to the image data is not displayed. is displayed.

[0040] Here, an example of the processing performed by the movement calculation section 260 will be explained with reference to FIG. The movement calculation unit 260 performs processing such that the restored and displayed image A (hereinafter referred to as the previous image A) is horizontally moved on the screen and displayed.

That is, the movement calculation section 260 operates to display a predetermined display area 27 of an image display section 270 as shown in FIG. 4(a) stored in the movement image storage section 250.
The image data of the previous image A, which is to be displayed on the entire screen, is processed so that it is displayed after being translated in parallel in the x direction of the screen by an amount L, as shown in FIG. give Then, in the empty area on the left side of the display area 271 resulting from the translation of the previous image A by the amount of movement L in the x direction, a new image (next image) B newly restored and stored in the image storage unit 230 is displayed. The relevant portion (the portion corresponding to the left empty area of the display area 271) is displayed. Here, the amount of movement L in the x direction that the movement calculation unit 260 performs on the previous image A
is defined by the following equation (1).

L=mW
・・・・・・
...(1) (W is the width of the display area 271,
(See FIG. 4B) The movement calculation unit 260 sets the value of m to 0.1, 0.2, 0.4, 0 for the image data of the previous image A stored in the movement image storage unit 250. .6,
Parallel movement processing is performed six times by sequentially changing the value to 0.8 and 1.0. Then, for each value of m, each time the parallel movement with respect to the previous image A is completed, the previous image A that has undergone the parallel movement is
The image data of is output to the display control section 240. At this time, the display control unit 240 displays the new image [Image B](
The restored image data of the new image B (hereinafter referred to as new image B) is also input, and the display control unit 240 combines the restored image data of the new image B with the parallel movement image data of the previous image A input from the movement calculation unit 260. The synthesized image obtained as a result of the synthesis is displayed on the image display section 270. In this display, the display control unit 240 gives priority to the parallel-translated image of the previous image A input from the movement calculation unit 260, and in the area where the parallel-translated image of the previous image A and the new image B overlap, the display control unit 240
Display the parallel image with priority. Therefore, the new image B is displayed only in the area where the parallel image of the previous image A is not displayed.
is displayed.

FIG. 5 shows an example of a composite display of the previous image A and the new image B by the above operation. In addition, the same figure (B), (C)
, (D), the part surrounded by broken lines indicates the area where the previous image A is not displayed.

As shown in FIG. 3(A), after the restored/finished image of image A up to the final layer is displayed in the display area 271, image A changes over time as shown in FIGS. ，
As shown in (D), image A is moved in parallel in the horizontal direction of the screen, and when m=1.0, image A moves to display area 2.
71 and the entire newly restored image B is displayed in the display area 271.

Therefore, instead of immediately switching from [Image A] to a new image [Image B], the previous image [Image A]
The entire newly restored image [Image B] gradually appears while gradually moving in parallel to the right in the display area 271.

[0046] Hereinafter, similar processing is performed on the second image [Image B]
and the third image [Image C], the third image [Image C]
and the fourth image [Image D], it is possible to restore and display images as if turning the pages of a right-bound book, allowing the user to search for images in a natural way. It can be performed.

Contrary to the above embodiment, the previous image may be displayed while sequentially moving in parallel to the left of the screen by a predetermined distance in accordance with a left-bound book. In addition, in the above embodiment, the screen of the last layer of the previous image is displayed by sequentially horizontally moving the screen, and the coarse (first layer)
We showed an example of restoring and displaying a new image from part to whole, but instead of moving the previous image horizontally, we moved the previous image vertically.
The previous image may be displayed while being translated from top to bottom.

In this case, the movement calculation unit 260 sets the value of m in the equation (1) to, for example, 0.1, 0.
The previous image may be displayed after being translated in parallel from top to bottom by the amount of movement L obtained by sequentially changing the amount by 2, 0.4, 0.6, 0.8, and 1.0.

An example of such an image display is shown in FIG. Such image display has the advantage that when displaying a newly restored image ([Image B] in FIG. 6), the images can be displayed as is in the order in which the images are restored by the image restoration unit 220.

Further, contrary to the above embodiment, the previous image may be displayed in parallel from the bottom to the top of the screen. By the way, when performing parallel translation display of the previous image two or more times, the ratio of the first translation is reduced (the ratio of change in the value of m in equation (1) is reduced), and the ratio of the second and subsequent translations is reduced. By sequentially increasing the ratio (Equation (1)
(by increasing the rate of change in the value of m), it is possible to express natural image movement similar to the movement of pages when turning a book.

Furthermore, in addition to the embodiments described above, only the previous image to be translated in parallel, or both the previous image to be translated in parallel and the newly restored image are displayed with a border, and the width of the border and the amount of movement of the previous image can be displayed. By displaying the two images while changing them at the same rate, the two images may be easily distinguished even when very similar images of the same type are successively translated and restored. Further, as another method for easily identifying two images, the brightness of the parallel-translated image may be lowered, or the brightness of the new image to be restored may be gradually increased.

By the way, in this embodiment, image data encoded by discrete cosine transform is used as the encoded image data to be restored and displayed, but the encoded image data to which the present invention can be applied is , but is not limited to, Hadamard transform using block coding method, Karhaunen-Loeve transform, etc.
Transform), Haar Tr
It is also possible to restore and display image data encoded using other orthogonal transforms such as (transform) or other encoding methods (restoration methods).

Furthermore, the present invention is not limited to an image display device that displays each image step by step from a coarse image to a finer image as in the above embodiment, but also displays each image one screen at a time. However, it is also applicable to an image display device that immediately shifts to displaying the next image. Such an image display device is possible by realizing a high-speed processor that successively restores and displays compressed image data at such a high speed that it does not look unnatural to the human eye.

[0054]

According to the present invention, an image that has been restored and displayed is moved and displayed, and at the same time, the restoration of the next image is started, and the previous image that has been moved and the newly restored new image are displayed. Since the images are synthesized and displayed, it is possible to search and display image data that allows the user to search for images at high speed and with a natural feeling similar to turning the pages of a book.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention.

FIG. 2 is a block diagram illustrating the configuration of an image display device according to an embodiment.

FIG. 3 is a block diagram showing the configuration of an image restoration section.

FIG. 4 is a diagram illustrating processing performed by a movement calculation unit.

FIG. 5 is a diagram illustrating a first example of image display.

FIG. 6 is a diagram illustrating a second example of image display.

FIG. 7 is a block diagram of an ADCT encoding circuit.

FIG. 8 is a diagram showing how an original image signal is divided into blocks.

FIG. 9 is a diagram showing values of two-dimensional DCT coefficients of each block obtained by a two-dimensional DCT transform unit.

FIG. 10 is a diagram showing values of quantization coefficients of each block obtained by quantizing two-dimensional DCT coefficients.

FIG. 11 is a diagram illustrating the scanning order of zigzag scanning of quantization coefficients.

FIG. 12 is a block diagram illustrating the configuration of a conventional image restoration device.

FIG. 13 is a block diagram illustrating the configuration of a conventional image restoration section.

[Explanation of symbols]

1. Restoration means 2 Image moving means 3 Display control means

Claims (9)

[Claims] Claim 1: An image display device for restoring and displaying encoded image data, comprising: a restoring means (1) for restoring the encoded image data to display image data; a display position moving means (2) for changing the display device of the display image data for which the display image data has been completed so that an image obtained by the display image data is moved and displayed on the screen; and the restoring means (1). The new image obtained from the display image data newly restored by the display position moving means (2) and the moved image of the previous image obtained from the display image data created by the display position moving means (2) are combined and displayed. Display control means to control (3)
An image display device comprising: 2. The display control means (3) is configured to select one of the new images created by the display position moving means (2) from among the new images obtained from the display image data newly restored by the restoration means (1). 2. The image display device according to claim 1, wherein control is performed so that only a portion corresponding to a display area where a moving image of a previous image obtained by display image data is not displayed is displayed. 3. The display position moving means (2) displays the display image data of the previous image restored by the restoring means (1) so that the previous image is moved in parallel on the screen in a horizontal direction. 3. The image display device according to claim 1, wherein the display position of the display image data of the previous image is changed so that the display image data of the previous image is displayed. 4. The display device moving means (2) moves the display image data of the previous image twice so that the previous image is displayed after being moved in parallel twice or more in the horizontal direction of the screen. 4. The image display device according to claim 3, wherein the image display device performs processing for changing the display position. 5. The display position moving means (2) moves the display image data of the previous image that has been restored by the restoring means (1) so that the previous image is displayed by vertically moving it in parallel. 3. The image display device according to claim 1, wherein the display position of the display image data of the previous image is changed. 6. The display position moving means (2) moves the display image data of the previous image twice so that the previous image is displayed with two or more parallel movements in the vertical direction of the screen. 6. The image display device according to claim 5, wherein the image display device performs processing for changing the display position. 7. The display position moving means (2) changes the display position of the display image data of the previous image so that the amount of movement of the display position of the previous image changes with each movement. The image display device according to claim 4 or 6. 8. The display control device (3) displays a moved image of the previous image obtained by the display image data created by the display position moving means (2) and the restoring means (
Claims 1, 2, 3, 4, 5, characterized in that at least one of the new images obtained by the newly restored display image data according to 1) is controlled to be displayed with a border. 8. The image display device according to 6 or 7. 9. The display control means (3) controls the brightness of the moving image of the previous image obtained by the display image data created by the display position moving means (2) and the new image using the restoring means (1). Claims 1, 2, and 3, characterized in that the new image obtained by the restored display image data is controlled to be displayed with a different brightness from that of the new image.
8. The image display device according to 4, 5, 6, 7 or 8.