JPH0630380A - Method for providing motion-picture-like effect on part of still picture - Google Patents

Abstract

PURPOSE:To reduce a time required for transfer and processing of data and a display time of each partial picture by selecting any of plural partial pictures sequentially and displaying each selected picture onto a specific area. CONSTITUTION:A still picture A is read from a 1st picture memory, outputted on a CRT display device via a D/A converter and the still picture A is displayed on an entire display screen C of the CRT display device. Then a specific area D in a memory area of a 1st picture memory is designated to be a rewrite area. Then the data of partial pictures B1, B2, B3,...B16 are sequentially read from a 2nd picture memory at a prescribed time interval (e.g. interval of 1/30sec) and the data of the read partial pictures B1, B2, B3,...B16 are being rewritten with data of the specific area D sequentially. Then the picture data in the 1st picture memory including the rewritten data are outputted onto the CRT display device via a pattern changeover circuit and the D/A converter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a moving image effect to a part of a still image by a still image reproducing device (for example, a still image reproducing device using high definition) used in an exhibition type high definition still image file system. It is about how to do it.

[0002]

2. Description of the Related Art Heretofore, there has been no apparatus for displaying a moving image on a part (for example, a specific part) of a still image using a still image reproducing device. For still images, image compression technology has already been established, and JPEG (Joint Photograph)
It has been standardized like the hic Experts Group) system, and has been put to practical use in high-definition galleries and the like. On the other hand, for moving images, currently MPEG (Mov
ing Picture Experts Group)
Although the method is being discussed, the compression algorithm is undecided and standardization is not progressing due to the problem of image quality.

[0003]

Therefore, as a transitional method, a method of displaying a moving image using a still image system can be considered. In this method, each frame is compressed by JPEG method (intra-frame compression) and recorded in a memory, which is sequentially read out from the memory, expanded, and displayed as a moving image. However, since the amount of data in video is huge,
The conventional still image system having only a limited image memory has a problem that it is difficult to deal with and is not practical.

Further, even if an attempt is made not to animate the entire screen but to animate only a specific part to reduce the required data amount, in the conventional still image system, the partial images are read one by one. Therefore, there is a problem in that the duration and the frame feed are considerably limited and a satisfactory moving image effect cannot be obtained. The present invention has been made in view of the above problems, and uses a still image reproducing apparatus having a limited image memory to give a moving image effect that is as satisfactory as possible to a part (for example, a specific part) of a still image. The purpose is to provide a method that can be done.

[0005]

A method for imparting a moving image effect to a part of a still image according to the present invention writes image data input from an image input unit or image data captured from a recording medium into an image memory, In a still image reproducing apparatus configured to display an image by outputting the image data read from the image memory to an image display unit, a first image memory for a still image and a second image memory for a moving image are provided.
One screen of still image data is written in the first image memory, a plurality of partial image data is written in the second image memory, and still image data read from the first image memory is output to the image display unit. While displaying a still image, a plurality of partial image data are sequentially read from the second image memory one by one at a predetermined time interval by the data transfer between the first and second image memories, and the partial image data are sequentially read out. Rewriting image data of a specific area of one image memory sequentially,
It is characterized in that a plurality of partial images are sequentially switched and displayed in this specific area.

[0006]

The still image data read from the first image memory is output to the image display unit to display the still image. While this still image is displayed, a plurality of partial image data are sequentially read from the second image memory one by one at a predetermined time interval by the data transfer between the first and second image memories. Since it is sequentially rewritten with the image data in the specific area of one image memory, a plurality of partial images are sequentially switched and displayed in the specific area (part) of the still image.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for imparting a moving image effect to a part of a still image according to the present invention will be described below with reference to FIGS. FIG. 2 shows a schematic block diagram of an apparatus for carrying out an embodiment of the method according to the invention. In FIG. 2, 1
0 is a host computer as a system controller,
A first image processor 16 having a main image processing function is coupled to the host computer 10 via a system bus 12 and a host interface 14. The system bus 12 further includes an input / output controller (hereinafter simply referred to as an I / O controller) 1
8 and a second image processor 20 having subordinate image processing functions are coupled.

The I / O controller 18 has input / output interfaces (hereinafter simply referred to as I / O) 22, 24.
Via the optical disk 26 as a recording medium, a CD-RO
M28 is bound. The first and second image processing processors 16 and 20 are connected to the first and second image processors 16 and 20 via a data bus 30.
The second image memories 32 and 34 are connected, and the counters 38 and 40 are connected. At the output side of the first and second image memories 32 and 34, a CRT display 46 as an image display unit is provided via a screen switching circuit 42 and a digital / analog conversion circuit (hereinafter simply referred to as D / A) 44. Are connected.

The address line 47 of the first image processor 16 is connected to the first and second image memories 3 via data selectors (hereinafter simply referred to as DS) 48 and 50.
It is bound to 2, 34. Output signals from the counters 38 and 40 are input to the other input side of the DSs 48 and 50.

The first and second image memories 32 and 34 mutually transfer image data between memories by the functions of the host computer 10, the first and second image processors 16 and 20, the I / O controller 18, and the like. It is configured to be able to. This memory-to-memory transfer is one of the already established playback control processes as specified in "Technical Guidelines of Exhibition-type HDTV Still Image Disk System", and therefore its explanation is omitted.

Next, the action of the above item 2 will be described with reference to FIG. (A) First, the operation of a general still image reproducing apparatus will be described. The first one-screen still image data read from the optical disk 26 or the CD-ROM 28 is written to one of the first and second image memories 32 and 34, and when the writing is completed, the next one-screen still image data is written. Is written to the other.

Next, the first and second image memories 32 and 34
The first one-screen still image data read from one of the two is output to the CRT display 46 via the D / A 44 and displayed, and the screen switching circuit 4 based on the screen switching command is displayed.
By switching between the two, the first and second image memories 32, 3
The next one screen of still image data read from the other side of 4 is output to the CRT display 46 via the D / A 44 and is switched and displayed. In the same manner, still image data read from the optical disk 26 or the CD-ROM 28 is switched and displayed one by one on the CRT display 46.

(B) Next, the operation peculiar to the present invention will be described. In advance, a still image A for one screen as shown in FIG. 1A and 16 frames for forming a moving image in each part obtained by equally dividing one screen as shown in FIG. Partial images (still images) B _{1 to} B ₁₆ are arranged on one screen,
An optical disc 2 as a recording medium for these images using an image input device (for example, a TV camera or an image scanner)
6 and CD-ROM 28. At this time, JPEG
Data is compressed and recorded by a compliant encoder. Although not limited to this, since the moving image has a lower human discriminating power for a finer part than the still image, the data compression rate of the partial images B _{1 to} B ₁₆ is lower than that of the still image A. Keep it high.

(C) Then, the host computer 10,
By the reproduction control processing established based on the functions of the first and second image processors 16 and 20, the I / O controller 18, etc., the image data is recorded from the optical disk 26 or the CD-ROM 28 in which the image data is recorded in the above (b). The image data of the still image A is first read out by decompressing and decompressing the data.
The image data of the partial images B _{1 to} B ₁₆ are written in the image memory 32 in the second image memory 34, respectively.

(D) Then, the still image A is read from the first image memory 32 by the established reproduction control processing, is output to the CRT display 46 via the D / A 44, and the display screen C of the CRT display 46 is displayed. A still image A is displayed on the entire surface of.

(E) Next, the following image data is transferred between the first and second image memories 32 and 34 by using the established memory-to-memory transfer technique. That is,
First, of the memory areas of the first image memory 32, the specific area D as shown in FIG. 1A is designated as the rewriting area. The area of the specific area D on the display screen is, for example, 1
It is set to 1/16 of the screen.

Next, the partial images B ₁ , B ₂ , and the like are read from the second image memory 34 at predetermined time intervals (for example, 1/30 second intervals).
Data of B ₃ , ..., B ₁₆ are sequentially read, and the data of the read partial images B ₁ , B ₂ , B ₃ , ..., B ₁₆ are sequentially rewritten with the data of the specific area D. And
The image data of the first image memory 32 including the rewritten data is output to the CRT display 46 via the screen switching circuit 42 and the D / A 44. For this reason,
(C), the display of the specific area D on the display screen C of the CRT display 46 is a moving image, and the remaining area (15/16 area) is a still image A.

In the above embodiment, the second image memory for writing the image data of a plurality of partial images for a moving image has a capacity for writing the image data of one screen, and the image of each part obtained by dividing one screen into 16 equal parts. The data is used as the data of each partial image, and the area of the specific region D for displaying the moving image is set to 16
However, the present invention is not limited to this, and for example, image data of a plurality of partial images for a moving image is written by a plurality of image memories having a capacity to write image data for one screen. It is also possible to form a second image memory for this purpose. In such a case, it is possible to increase the number of a plurality of partial images for moving images and obtain a high-level moving image effect.

In the above-described embodiment, data of a plurality of partial images for moving images are written in the second image memory, and data of individual partial images are sequentially read from the second image memory at predetermined time intervals by inter-memory transfer. The moving image is displayed on the specific portion of the still image only by rewriting to the specific area of the first image memory, but the present invention is not limited to this, and in parallel with the moving image display processing according to the above-described embodiment. Image data may be appropriately read from the storage medium, and the newly read image data may be written from the second image memory to the already read memory area by inter-memory transfer. In this case, a continuous moving image effect can be obtained.

In the above embodiment, the specific area for displaying the moving image is fixed in time, but the present invention is not limited to this, and as shown in FIG. The specific area Da to be displayed may be moved with time. In this case, the movement of an airplane or a car can also be displayed.

[0021]

As described above, the method of imparting a moving image effect to a part of a still image according to the present invention includes the first image memory for a still image and the second image memory for a moving image, and the first image memory is provided. One screen of still image data is written to the memory, a plurality of partial image data is written to the second image memory, and the still image data read from the first image memory is output to the image display unit to display a still image. During the first, second
By transferring the data between the image memories, a plurality of partial image data is sequentially read from the second image memory one by one at a predetermined time interval and sequentially rewritten with the image data in the specific area of the first image memory. Since the partial images of one sheet are switched and displayed in sequence, data transfer,
It is possible to reduce the time required for processing and the display time of each partial image. Therefore, a moving image effect can be added to a part of the still image by using the still image reproducing device having a limited image memory.

Due to the difference in human discriminating power between a moving image and a still image, generally, the data compression ratio of the partial image data written in the second image memory is made higher than that of the still image data written in the first image memory. In this case, the number of partial images for displaying a moving image can be increased (that is, the number of frames can be increased) and the reading speed from the storage medium to the second image memory can be increased. It will be easy. Therefore, it is not necessary to write all of the plurality of partial images (for example, 32) for displaying the moving image in the second image memory at once (the plurality of partial images (for example, 16) to enhance the moving image effect). Although it is necessary to write the images at once), it is possible to write the partial image data read sequentially from the storage medium to the memory area that has already been read from the second image memory by inter-memory transfer. Allows you to get partial motion pictures with smoother movement and longer time.

[Brief description of drawings]

FIG. 1 is an explanatory view for explaining an embodiment of a method for adding a moving image effect to a part of a still image according to the present invention, in which (a) shows a still image A corresponding to image data to be written in a first image memory. (B) shows a plurality of partial images B _{1 to} B ₁₆ corresponding to the image data to be written in the second image memory,
(C) shows the display screen when the specific area for displaying the partial image is fixed, and (d) shows the display screen when the specific area for displaying the partial image is variable.

FIG. 2 is a schematic configuration diagram of a still image reproducing apparatus that implements the method shown in FIG.

[Explanation of symbols]

10 ... Host computer, 16, 20 ... Image processing processor, 18 ... I / O controller, 32 ... First image memory, 34 ... Second image memory, 42 ... Screen switching circuit, 46 ... CRT display, A ... First image still image corresponding to the still image data to be written in, B ₁ ~B ₁₆ ... partial image corresponding to the partial image data to be written to the second image memory, C ... display screen, D, a specific area for displaying the Da ... partial image .

Claims (1)

[Claims] 1. An image is displayed by writing image data input from an image input unit or image data captured from a recording medium into an image memory and outputting the image data read from the image memory to an image display unit. In the still image reproducing apparatus described above, a first image memory for still images and a second image memory for moving images are provided, and still image data for one screen is written in the first image memory, and a plurality of images are written in the second image memory. The partial image data is written, and the first
While the still image data read out from the image memory is being output to the image display unit, a plurality of partial image data are predetermined from the second image memory by the data transfer between the first and second image memories. A method for imparting a moving image effect to a part of a still image, characterized in that the images are sequentially read one by one at time intervals and sequentially rewritten with the image data in a specific area of the first image memory.