JPH02141874A - Image information filing and retrieving system - Google Patents

Abstract

PURPOSE:To cope with the conversion to a large scale and the conversion to a wide area of the image information filing and retrieving system by constituting said system so that the simultaneous access of a retrieval and updating of the same image information in the image information filing and retrieving system can be executed. CONSTITUTION:Location management information of image information is collected in a data unit and manage din an image directory information file 9. In order to bring this image directory information file 9 to unified management by a request from a retrieval session 3 and an updating session 4, an image information access control module 6 exists. In this environment, even when updating is generated simultaneously or in the course of retrieval to the same image information from each session 3, 4, or a retrieval access request is generated in the course of updating, the retrieval and updating can be executed asynchronously from the respective sessions 3, 4. In such a way, it is possible to cope satisfactorily with the conversion to a large scale and the conversion to a wide area of the image information filing and retrieving system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image information filing and retrieval system.

[Conventional technology]

In conventional image information filing and retrieval systems,
Access to the same image information from multiple terminals (workstations) enabled searches and searches, but updating during a search or searching during an update resulted in a busy error.

[Problem to be solved by the invention]

In the conventional image information filing and retrieval system described above, it is not possible to simultaneously search and update the same image information from multiple terminal (workstation) sessions, so it is difficult to increase the scale and area of the image information filing and retrieval system. There is a problem that it cannot be dealt with well.

[Means to solve the problem]

The image information filing/retrieval system of the present invention includes:
An image directory information file that stores location information of image information in an image information file for each key value based on document number and generation number; and an image directory information file that stores information on the location of image information in the image information file for each key value based on document number and generation number; A temporary directory file for each session to be loaded, and upon receiving the access request, executing the loading, searching or updating directory information on the temporary directory file, and passing it to the corresponding session,
The image information access control module writes updated directory information to the image directory information file in an additional manner.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an image information filing and retrieval system showing one embodiment of the present invention.

In this embodiment, the image information is stored in an image information file on the magnetic disk 5 or optical disk 10. Furthermore, location management information (directory information) indicating where each piece of image information is stored on the image information file is managed in the image directory information file 9 in units of materials.

An image information access control module 6 exists for the purpose of centrally managing this image directory information file 9 according to requests from the search session 3 and update session 4.

Note that a session exists for each active terminal (workstation), and through inter-task communication with the image information access control module 6, the directory information of the image information is obtained and the image information file is directly accessed.

In the above environment, even if search session 3 and update session 4 update the same image information at the same time, or if a search access request occurs during a search, the directory information is temporarily saved. It is possible to extract the data to a directory file 7.8 and search and update it asynchronously from each session.

When updating image information, the characteristics of the optical disk 10, which is a non-rewritable medium, are utilized, and the magnetic disk 5 is also write-once, so that the pre-update image information is also present in the image information file. . Therefore, the updated directory information can be additionally registered in the image directory information file 9 as separate directory information.

As is clear from the detailed diagram of the directory information shown in Figure 2, the key value of directory information is composed of a combination of document number and generation number, and each time an update is made, the generation number is counted up and a separate directory is created. It has been additionally registered as

The search session enables simultaneous access to search and update image information using zero or more methods of obtaining directory information of image information using the latest generation number of the relevant document at the time of the search request and referring to the image information.

The present invention is very effective in an image information retrieval system in which a general-purpose host computer is used as a filing processor and a large number of retrieval terminals (workstations) are configured using a LAN or wide area network.

〔Effect of the invention〕

As explained above, the present invention makes it possible to simultaneously search and update the same image information in an image information filing and retrieval system, which is expected to improve the scale of image information filing and retrieval systems in the future. It has become possible to build a system that can withstand an increase in the number of search and update terminals (workstations) per system.Furthermore, with the advancement of network technology and the reduction in line costs, image information can be searched/updated from remote terminals. Search for updates when they become available.

Simultaneous access for updates is a necessary condition. The present invention has made this possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a detailed diagram of directory information in this embodiment. 1.2...Terminal, 3...Search session, 4...
Update session, 5... Magnetic disk, 6... Image information access control module, 7.8... Temporary directory file, 9... Image directory information file, 10... Optical disk.

Claims (1)

[Scope of Claims] An image directory information file that stores location information of image information in an image information file for each key value based on document number and generation number; A temporary directory file for each session into which the relevant directory information is loaded from, and when the access request is made, the loading is executed, the directory information is searched or updated on the temporary directory file, and the information is handed over to the relevant session. ,
An image information filing/retrieval system, comprising: an image information access control module that writes updated directory information in the image directory information file in an add-on manner.