JPH0798579A - Picture display system - Google Patents

Abstract

PURPOSE:To shorten a waiting time for initial display and process display by storing temporarily picture data of high resolution sent from a second transfer means. CONSTITUTION:In the case of request of an initial display, transfer for initial display on a picture data preserving device 1 for picture data of low resolution is required. Then picture data of low resolution is generated in a low resolution picture data generation section 11 of the picture data preserving device 1, and send to a picture display device 3. Receiving picture data of low resolution, the picture display device 3 performs initial display based on the picture data. After that, the picture data preserving device 1 transfers automatically the original picture data of high resolution. And receiving picture data of high resolution, the picture display device 3 writes the picture data in a buffer memory 33. Next, when process display is required, the picture display device 3 reads out picture data of high resolution from the buffer memory 33, the prescribed processing is performed, the picture data is sent to a picture display section 31, and picture data is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an image which can be suitably used when a user first refers to the entire image and cuts out a part or enlarges or reduces it as necessary while watching it. It relates to a display system.

[0002]

2. Description of the Related Art When displaying high resolution image data stored in an image data storage device on a low resolution image display device, it is not possible to display all of the image data. , Reduction processing and clipping processing,
Alternatively, a combination of these processes is performed to convert the image into a low-resolution image and display it.

Further, when the user wants to refer to the displayed image in detail, a partial image is cut out if necessary,
It will be displayed after being processed such as being enlarged. If the former display is referred to as "initial display" and the latter display is referred to as "processed display", there have conventionally been two methods depending on where the initial display or processed display is performed. One is a method in which upon request from the image display device, the image data storage device performs reduction processing or processing processing, transfers the result to the image display device, and the image display device receives and displays the image data. is there.

The other one is a method in which, when a request is made from the image display device, the image data storage device transfers the original image data as it is, and the image display device performs reduction processing or processing processing and displays the image data.

[0005]

However, in the former method, since the amount of image data transferred for initial display is relatively small, the initial display is quick, but the image data of the processed data is requested each time the modified display is requested. You have to request a transfer,
There is a problem that it takes time for each processing display.

On the other hand, in the latter method, since the original high resolution image data is transferred, the processed display can be speeded up. However, since the image data amount when transferring the high resolution image data for the first time is large, until the initial display. There is a problem that it takes time. Therefore, an object of the present invention is to provide an image display system that solves the above-mentioned technical problem and that requires less waiting time between initial display and processed display.

[0007]

An image display system according to claim 1 for attaining the above object comprises an image data storage device and an image display device, and the image data storage device comprises an image display device. When image data transfer for image display is requested, first transfer means for transferring low resolution image data for initial display, and high resolution after transfer of low resolution image data by the first transfer means The image display device includes a second transfer unit for transferring image data, and the image display device temporarily stores the high-resolution image data sent by the second transfer unit, and the storage unit according to a user operation. Processing means for processing the high resolution image data stored in the display means, and display means for displaying the low resolution image data sent by the first transfer means and for displaying the processed image data. It is one that is equipped with a.

An image display system according to a second aspect of the present invention further comprises initial display data storage means for temporarily storing the low resolution image data sent by the first transfer means. The image display system according to claim 3,
It further comprises a processed display data storage means for storing the image data processed by the processing means even after the display thereof is completed.

[0009]

According to the structure of the first aspect, in response to the request for the initial display, the low-resolution image data can be transferred and displayed by the first transfer means. Can be made smaller. Then, while the user is watching the initial display, the high-resolution image data is transferred and stored by the second transfer means. Therefore, if the user requests the modified display, the modified display is immediately processed and displayed. be able to.

According to the structure of claim 2, in the image display device, by storing the image data of the initial display in the initial display data storage means, after the processed display,
When it is requested to return to the initial display, the image data of the initial display is stored in the initial display data storage unit without processing the high-resolution image data sent by the second transfer unit into the initial image. Since you only need to read it,
You can quickly return to the initial display.

According to the third aspect of the present invention, in the image display device, the processed image is stored in the processed display data storage means, so that after the processed display, the processed display which has been already displayed is returned. When it is requested, the processed display image data stored in the processed display data storage means is simply read out without performing the same processing again from the high resolution image data sent by the second transfer means. Since it is good, you can quickly return to the past processing display.

[0012]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. (1) First Embodiment FIG. 1 is a block diagram showing an image display system including an image data storage device 1 and an image display device 3.

The image data storage device 1 comprises an image data storage unit 13, a low resolution image data generation unit 11, and an image data transmission unit 12.
It may be a file server on the network itself or an external storage device in the same host. The image data storage unit 13 is an image memory that stores a high resolution image data group, and the stored image data format may or may not be compressed.

The low resolution image data generation unit 11 generates low resolution image data for initial display in accordance with the image display resolution of the image display device 3 or the display request resolution. This generation method may be enlargement / reduction of the entire image, clipping, or a combination thereof. The method of further enlarging / reducing may be pixel thinning or orthogonal transformation.

The image data transmission unit 12 transmits the generated low resolution image data to the image display device 3, and thereafter,
The original high-resolution image data is transmitted, and the transmitted image data may or may not be compressed. The image display device 3 includes an image display unit 31 including a CRT, an image data receiving unit 32, a buffer memory 33, and an image data processing unit 34, and is connected to the image data storage device 1 via the communication path 2. Has been. The communication path 2 may be a communication line forming a network or a system bus in a computer system.

The image display unit 31 is used for low-resolution display for initial display and modified display, but it does not necessarily have to be capable of high-resolution data display. If the received image data is low-resolution image data for initial display, the image data receiving unit 32 sends the image data to the image display unit 31,
When the received image data is high-resolution image data for modified display, the image data is written in the buffer memory 33.

The image data processing unit 34 requests from the user who is referring to the initial display a processing display such as cutting out, enlarging / reducing a partial image of the same image or a combination thereof, if necessary. The high-resolution image data is read out and processed. The above-described operation of the image display system will be described separately for the processing of the image display apparatus 3 and the processing of the image data storage apparatus 1 with reference to flowcharts (FIGS. 2 and 3). First, in FIG. 2, if there is a request for image display (step S1), it is determined whether the request is a request for initial display or a request for processing display (step S2). If it is a request for initial display, the image data storage device 1 is requested to transfer low-resolution image data for initial display (step S3).

Then, in the image data storage device 1, FIG.
In step S11 of, it is determined that there is a request for initial display,
The high resolution image data in the image data storage unit 13 is read (step S12), and the low resolution image data generation unit 11 is read.
Low-resolution image data is generated at step S
13). The image data transmitting unit 12 transmits the generated low resolution image data to the image display device 3 (step S
14). Although the low-resolution image data generation unit 11 has generated low-resolution image data subsequently after it is determined that there is a request for initial display, the low-resolution image data generation unit 11 previously generates and saves low-resolution image data before requesting initial display. It may be stored in advance.

When the image display device 3 receives the low-resolution image data (step S4), it makes an initial display based on the image data (step S5). After that, the image data storage device 1 automatically transfers the original high resolution image data (step S15). And the image display device 3
Receives high-resolution image data (step S
6) The image data is written in the buffer memory 33 (step S7).

Next, when a processing display request is made,
The image display device 3 reads out high-resolution image data from the buffer memory 33 (step S8), performs a predetermined processing process, and transfers it to the image display unit 31 (step S9).
The delivery format may or may not be compressed. The image display unit 31 displays the received image data (step S10).

As described above, in response to a request for initial display, low-resolution image data can be immediately generated and transferred (step S11-14). Therefore, the image display device 3 promptly performs initial display. Can be done. Then, while the user is watching the initial display, the high-resolution image data is transferred (step S15) and stored in the buffer memory 33 (step S7). If the user requests the modified display, It can be immediately processed and displayed (step S8-10). (2) Second Embodiment FIG. 4 is a block diagram showing another image display system including the image data storage device 1 and the image display device 3.

The image data storage device 1 comprises an image data storage unit 13, a low resolution image data generation unit 11, and an image data transmission unit 12. These image data storage unit 13 and low resolution image data generation unit The functions of the unit 11 and the image data transmission unit 12 are the same as those described in the first embodiment. The image display device 3 includes an image display unit 31, an image data receiving unit 32, a buffer memory 33, an image data processing unit 34, and an initial display data storage unit 35, and stores image data via the communication path 2. It is connected to the device 1. This communication path 2 also has the same function as described in the first embodiment.

The image display unit 31, the buffer memory 33, and the image data processing unit 34 also have the same functions as described in the first embodiment. If the received image data is low-resolution image data for initial display, the image data receiving unit 32 sends the image data to the initial display data storage unit 35, and the received image data is processed and displayed. If the image data has high resolution, the image data is written in the buffer memory 33.

The initial display data storage unit 35 stores the initial display data even during processing display, and when it is requested to return to the initial display, the stored data is stored in the image display unit 3.
It is to be transferred to 1. The operation of the image display system described above is divided into a process of the image display device 3 and a process of the image data storage device 1, and each is a flowchart (FIGS. 5 and 3).
Explained by. First, in FIG. 5, if there is a request for image display (step S1), it is determined whether the request is a request for initial display or a request for processing display (step S2).

If it is an initial display request, it is further determined whether it is a first initial display request or a second or subsequent initial display request (step S16). If it is a request for initial display for the first time, a request to transfer low-resolution image data for initial display is made to the image data storage device 1 (step S3).
Then, the image data storage device 1 performs the same operation as described in the first embodiment (FIG. 3; step S11-).
14). That is, the high resolution image data in the image data storage unit 13 is read out, and the low resolution image data generation unit 11 is read.
At, low-resolution image data is generated, and the generated low-resolution image data is transferred.

Upon receiving the image data for the initial display (step S4), the image display device 3 writes the image data in the initial display data storage section 35 (step S17) and performs the initial display (step S5). ). After that, the image data storage device 1 automatically transfers the original high resolution image data (FIG. 3; step S15). When the image display device 3 receives the high-resolution image data (step S6), the image display device 3 writes the image data in the buffer memory 33 (step S7).

If the request for the initial display is the second or later one, the initial display data is read from the initial display data storage section 35 (step S18), and the data is read by the image display section 3.
It is sent to 1 and displayed (step S19). When the processing display is requested, as described in the first embodiment, the image display device 3 reads the high resolution image data from the buffer memory 33 (step S8), performs the predetermined processing and performs the image processing on the image display unit. The image data is transferred to 31 (step S9), and the image display unit 31 displays the received image data (step S10).

As described above, in response to the second and subsequent initial display requests, no data transfer request is made to the image data storage device 1 and no initial display data is processed from high resolution data. Since the initial display data may be read from the initial display data storage unit 35, the image display device 3 can promptly perform the initial display. (3) Third Embodiment FIG. 6 is a block diagram showing still another image display system including the image data storage device 1 and the image display device 3.

The image data storage device 1 comprises an image data storage unit 13, a low resolution image data generation unit 11, and an image data transmission unit 12, and these image data storage unit 13 and low resolution image data generation unit The functions of the unit 11 and the image data transmission unit 12 are the same as those described in the first embodiment. The image display device 3 includes an image display unit 31, an image data receiving unit 32, a buffer memory 33, an image data processing unit 34, and a processed display data storage unit 36, and stores image data via the communication path 2. It is connected to the device 1. This communication path 2 also has the same function as described in the first embodiment.

The image display unit 31, the image data receiving unit 32, the buffer memory 33, and the image data processing unit 34 also have the same functions as described in the first embodiment. The processing display data storage unit 36 stores the processing display data on which the requested processing has been performed, even if another processing display request is made later, and when it is requested to return to the already processed processing display. Is to transfer the image data to the image display unit 31. In the embodiment, the processed display data storage unit 36 has a storage capacity of N screens (N is a natural number).

The operation of the image display system described above will be divided into the process of the image display device 3 and the process of the image data storage device 1 and will be described with reference to flowcharts (FIGS. 7 and 3). First, in FIG. 7, if there is a request for image display (step S1), it is determined whether the request is a request for initial display or a request for processing display (step S2).

If it is a request for initial display, a request for transferring low-resolution image data for initial display is made to the image data storage device 1 (step S3). Then, the image data storage device 1 performs the same operation as that described in the first embodiment (FIG. 3; step S11-14). That is, the high resolution image data of the image data storage unit 13 is read out,
The low resolution image data generation unit 11 generates low resolution image data, and the generated low resolution image data is transferred.

Upon receiving the image data for the initial display (step S4), the image display device 3 performs the initial display based on the image data (step S5). After that, the image data storage device 1 automatically transfers the original high resolution image data (FIG. 3; step S15). When the image display device 3 receives the high resolution image data (step S6), the image display device 3 stores the image data in the buffer memory 3
3 (step S7).

When the processing display is requested, the image display device 3 checks whether the processing display data which has been subjected to the predetermined processing is stored in the processing display data storage section 36 (step S20). If it is stored, it is read (step S22) and displayed on the image display unit 31 (step S23). If not stored, the high-resolution data is read from the buffer memory 33 (step S8), the image data processing unit 34 performs a predetermined processing process (step S9), and the data is written into the processed display data storage unit 36. At the same time (step S21), the image data is displayed on the image display unit 31 (step S1).
0).

As described above, in the third embodiment, in response to the same processed / displayed request, the data can be read from the processed / displayed data storage section without processing the initial display data from the high resolution data. The image display device 3 is
The processing display can be displayed promptly. The present invention is not limited to the above Examples 1-3. For example, if the user sees the initial display and determines that the modified display is unnecessary, the user may perform a predetermined operation to terminate the transfer of the high resolution data and improve the processing efficiency.

[0036]

As described above, according to the image display system of the first aspect of the present invention, in response to a request for initial display, low-resolution data matching the resolution of the image display device is transferred to the initial stage. The time for display can be shortened. Also, while the user is referring to the initial display,
Since the original high resolution data is transferred, the high resolution data can be transferred without feeling the length of the transfer time. Furthermore, if the user requests a modified display, the modified process can be performed based on the high-resolution data that has already been transferred, so that the efficiency of communication channel use is improved.

According to the image display system of the second aspect of the present invention, the initial display data such as the whole image which is considered to be frequently requested is stored even after the display is completed, so that the initial display can be returned later. If it is required, the initial display can be promptly performed without making a transfer request to the image data storage device and processing the initial display data from the high resolution data.

According to the image display system of the third aspect of the present invention, by storing the processed image even after the display of the processed display data is finished, it is possible to return to the same processed display later. The processed display can be promptly performed without processing the initial display data from the high resolution data.

[Brief description of drawings]

FIG. 1 is a block diagram showing an image display system including an image data storage device 1 and an image display device 3.

FIG. 2 is a flowchart illustrating processing of the image display device 3.

FIG. 3 is a flowchart illustrating a process of the image data storage device 1.

FIG. 4 is a block diagram showing another image display system including the image data storage device 1 and the image display device 3.

FIG. 5 is a flowchart illustrating a process of the image display device 3.

FIG. 6 is a block diagram showing still another image display system including an image data storage device 1 and an image display device 3.

FIG. 7 is a flowchart illustrating processing of the image display device 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 image data storage device 2 communication path 3 image display device 11 low resolution image data generation unit 12 image data transmission unit 13 image data storage unit 31 image display unit 32 image data reception unit 33 buffer memory 34 image data processing unit 35 initial display data Storage unit 36 Processing display data storage unit

Claims (3)

[Claims] 1. An image data storage device comprising an image data storage device and an image display device, wherein the image data storage device, when requested by the image display device to transfer image data for image display, has a low resolution for initial display. First transfer means for transferring image data;
The image display device temporarily stores the high-resolution image data sent by the second transfer means, and the second display means transfers the high-resolution image data after the transfer of the low-resolution image data by the transfer means. Storage means, processing means for processing the high resolution image data stored in the storage means in response to a user's operation, and low resolution image data sent by the first transfer means. An image display system comprising: a display unit that displays the image data processed by the processing unit. 2. The image display system according to claim 1, further comprising an initial display data storage means for temporarily storing the low resolution image data sent by the first transfer means. 3. The image display system according to claim 1, further comprising a processed display data storage means for storing the image data processed by the processing means even after the display thereof is completed.