JP2535682B2 - Document storage / display processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document storage / display processing method for reducing and displaying document data on a display device having a small number of display pixels in a document search device for storing and searching document data. It is a thing.

[0002]

2. Description of the Related Art In an apparatus such as an electronic filing system that stores, retrieves, and displays document data, the number of pixels that can be displayed on the display (the product of the resolution and the display area) is generally limited, and the document data is not changed. You cannot display the list. For example, if a document is input by a scanner with a resolution of 8 dots / mm, it is 1 for A4 size documents.
The size is 680 dots (horizontal) × 2376 dots (vertical), and in order to display A4 size as a list, a display having a display pixel number of 1680 dots (horizontal) × 2376 dots (vertical) is required. . Such high resolution displays are quite expensive and are not used in common equipment. Therefore, it is necessary to reduce and convert the document data according to the number of display pixels on the display.

Conventionally, as a reduction conversion method, as a simple and general method, there is a method of reducing document data by a simple blinking process, but the reduction data can be obtained at high speed, but the image quality is deteriorated. There is. On the other hand, as a method of obtaining high quality reduced data, there is a method of generating reduced data from the relationship of surrounding pixels, etc. Generally, the image quality is better than the simple spreading method, but the conversion time is complicated because the processing is complicated. Takes a long time and the display speed is slow. As described above, the speeding up of the reduction conversion and the improvement of the quality are contradictory.

[0004]

As a method for fusing higher speed and higher quality, first, document data is displayed at high speed by simple spread processing (high-speed reduction conversion method).
There is a method of sequentially changing to high quality display by high quality data obtained by a high quality reduction conversion method upon automatic activation or user's request. However, even this method does not shorten the conversion time to high-quality reduced data, and therefore cannot display high-quality reduced data at high speed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a document data storage / display processing method for displaying high quality reduced data at high speed in order to solve the conventional drawbacks.

[0006]

FIG. 1 is a block diagram showing the principle of the present invention. Reference numeral 100 in the drawing denotes document data input.
Reference numeral 101 denotes a first reduction conversion unit, which reduces the conversion of document data at a high speed though of low quality. A second reduction conversion unit 102 performs reduction conversion of document data into high quality at a low speed. 103 is a document data holding unit, 104
Represents a data processing device.

The dotted route shown in the figure is a route for performing high-quality reduction conversion when a special instruction is given during storage.

[0008]

According to the present invention, there is provided a document storage / display processing method for a document search device for storing / searching / displaying digitized document data, such as an electronic filing system.
As document data, original data and reduced data during storage (first reduced data reduced by low-speed but high-speed reduction conversion means, or second reduced data reduced by low-speed, high-quality reduction conversion means) ) Is stored in association with each other, and the first reduced data accumulated at the time of accumulation is replaced with the second reduced data having the same reduction ratio and stored by a request for improvement in quality by subsequent manual or automatic activation. That is, at the time of search, by reading and displaying the reduced data corresponding to the document data of the search result,
It enables high-quality reduced display at high speed at the time of retrieval, and at the same time realizes high-speed and high-quality document data reduced display, which was not possible in the past.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a diagram showing the operation flow of the present invention. FIG. 3 is a diagram showing an example of a document search device for explaining an embodiment of the present invention, and 200 is an input unit 1, 201 which is a keyboard for issuing a search instruction or the like, or a pointing device such as a tablet or a mouse. Is a display unit for displaying document data or the like as a search result, 202 is an input unit 2, 203 including a scanner for inputting document data, a FAX
Is a storage unit for storing document data and the like, 204 is a screen processing unit for performing encoding / decoding processing of document data, reduction conversion processing, display control to the display unit, and 205 is for transferring document data, etc. A bus, 206 is a transfer control unit that controls the transfer of the bus 205, and 207 is a control unit that controls the entire apparatus and has a database function such as registration and search of document data.

FIG. 4 is a diagram showing a storage state of document data (reduced data and original data) in the storage unit 203 of FIG. Embodiments of the present invention will be described below with reference to FIGS.

The user first inputs document data from the input unit 202 (100 in FIG. 2). As document data,
When the input unit 202 is a personal computer, a word processor, etc., it is code data, and when the input unit 202 is a scanner, FAX, etc., it is image data. In a typical document retrieval device, since the input of documents that are already paper, such as various documents and clippings of magazines and newspapers, is the main input, the document data will be described here as image data. If the document data is code data, the same description can be made by converting the code data into image data.

The document data input from the input unit 202 is transferred to the screen processing unit 204 via the bus 205 under the control of the control unit 207 and the transfer control unit 206. The screen processing unit 204 first develops the document data in the work area as a dot image. If the document data is data from the scanner, it is input as a dot image, so it is expanded in the work area as it is. Since the document data from the FAX is MH or MR encoded, it is decoded and developed as a dot image in the work area. The size of the expanded dot image data is determined by the resolution of the input device and the size of the input document. In the case of document input, generally, 8 dots / mm is often used as the resolution. In this case, in the case of an A4 size document, a dot image having a size of 1680 dots (horizontal) × 2376 dots (vertical) is used. It is deployed in the work area.

On the other hand, regarding the display unit 201, a personal computer,
In a word processor, a display having a display pixel number of 640 dots (horizontal) x 400 dots (vertical) is common, and even in a workstation, 1280 dots (horizontal) x
A display having a display pixel number of 1024 dots (vertical) or less is often used. Further, a display device capable of displaying A4 size (1680 dots (horizontal) × 2376 dots (vertical)) as it is is extremely expensive and is hardly used except for some filing systems and DTP systems. Further, there is no liquid crystal display with high resolution that can display A4 size as it is. As described above, due to the limitation of the display unit, generally, the A4 size dot image on the work area cannot be displayed as it is on the display unit, and when the document data is displayed as a list, the number of display pixels of the display unit is changed. It is necessary to reduce and convert the document data for display.

As a reduction conversion method, a method based on simple spreading processing is generally used, and although reduction conversion can be performed at high speed, it has a drawback that the image quality is poor. On the other hand, a method of reducing and converting without deteriorating the image quality (for example, Japanese Patent Application No. 1-
No. 119539, “Reduction conversion method”), but generally has high quality, but since the reduction processing is performed based on the relationship between peripheral pixels, the processing becomes complicated and conversion time is long. . Hereinafter, the former reduction conversion method will be referred to as a high-speed reduction conversion method, and the latter reduction conversion method will be referred to as a high-quality reduction conversion method. The reduced data reduced by the high-speed reduction conversion method is called high-speed reduced data, and the reduced data reduced by the high-quality reduction conversion method is called high-quality reduced data.

When the high quality reduction conversion is automatically started, the screen processing unit 204 uses the high quality reduction conversion method to convert the dot image of the document data developed in the work area into a work area at a reduction ratio according to the resolution of the display unit. Reduction conversion is performed upward (101 and 102 in FIG. 2). When displaying and confirming the input result, the high-quality reduced data of the reduced result is displayed on the display unit 20.
Transfer to 1 and display. When the high-quality reduction conversion processing is completed, the screen processing unit 204 notifies the control unit 207 of the irregularity. The control unit 207 registers the document data in the database so as to be able to search for the document data described later, and obtains the storage information on the storage unit of the high quality reduced data and the original data.
When the registration processing in the database is completed, the control unit 207 requests the screen processing unit 204 to compress the high quality reduced data and the original data, and at the same time, the transfer control unit 2
06, the storage unit 203 is activated. The transfer control unit 206
Under the control of the control unit 207, the high quality reduced data compressed by the screen processing unit 204 and the original data are sequentially transferred to the storage unit 203 via the bus 205 and stored based on the storage information obtained from the database. Yes (10 in FIG. 2)
4).

As a data compression method, in the case of document data, MH and MR which are generally internationally standardized binary data data compression methods used in facsimile communication.
Alternatively, the MMR coding method is used. By performing the above-described processing by automatic start in parallel with the processing of inputting the document data of the next page from the input unit 202, it is possible to reduce the annoyance of the user for the length of the processing time required for the reduction conversion by the high quality reduction conversion method. . Such parallel operation is
This is particularly effective when the time required for document data input processing is longer than the reduction conversion time.

When the user interrupts the reduction conversion due to some operation request before the reduction conversion by the high quality reduction conversion method is completed, the control unit 207 detects the operation request from the input unit 200, and The screen processing unit 204 is requested to stop the high quality reduction conversion. The screen processing unit 204
The reduction conversion results up to the middle are discarded, and the original data of the document data on the work area is reduced by the high-speed reduction conversion method at the same reduction ratio as in the high-quality reduction conversion method, and high-speed reduction data is obtained (Fig. 2 of 106).

Upon receiving from the screen processing unit 204 a notification of the end of the reduction processing by the high-speed reduction conversion method, the control unit 207.
Deletes the high-quality reduced data already registered in the database from the database, newly registers the high-speed reduced data in the database, and obtains the storage information on the storage unit for the high-speed reduced data. The storage information in the storage unit for the original data has already been acquired as described above. When the database update process is completed, the control unit 207 issues a data compression request to the screen processing unit 204 for the high-speed reduced data and the original data, and
The transfer control unit 206 and the storage unit 203 are activated. Under the control of the control unit 207, the transfer control unit 206 sequentially transfers the high-speed reduced data compressed by the screen processing unit 204 and the original data to the storage unit 203 via the bus 205 and obtains them from the database. It is accumulated based on the stored information (107 in FIG. 2).

When the high quality reduction conversion is not automatically started, the user may manually request the high quality reduction conversion or may not always request the high quality reduction conversion.
When manually initiating the high quality reduction conversion, the user makes an instruction request for the high quality reduction conversion from the input unit 200. Control unit 2
Upon receiving the instruction request, 07 issues a high quality conversion request to the screen processing unit 204. Subsequent operations are the same as those in the case of the above-described automatic start (101, 105, 1 in FIG. 2).
02).

When the user does not make a high quality reduction conversion request, the original data of the document data on the work area is reduced and converted on the work area at a reduction rate according to the resolution of the display unit by the high speed reduction conversion method ( (105, 106 in FIG. 2).

When the high-speed reduction conversion process is completed, the screen processing unit 204 notifies the control unit 207 of the irregularity. The control unit 207 registers the document data in the database so as to be able to retrieve the document data described later, and obtains the storage information of the high-speed reduced data and the original data in the storage unit. Control unit 207
When the registration process in the database is completed, the request for data compression of the high-speed reduced data and the original data is sent to the screen processing unit 204, and the transfer control unit 206 and the storage unit 2
Start 03. Under the control of the control unit 207, the transfer control unit 206 sequentially transfers the high-speed reduced data compressed by the screen processing unit 204 and the original data via the bus 205,
The data is transferred to the storage unit 203 and stored based on the stored information obtained from the database (107 in FIG. 2).

In the above description, the high-speed conversion processing and the high-quality conversion processing are both performed by the screen processing unit 204, but it may be performed by the software of the control unit 207. In this case, the control unit 207 reads the dot image from the screen processing unit 204, performs reduction conversion, and transfers the reduction data of the conversion result to the screen processing unit. The operation after the reduced data is obtained in the screen processing unit is the same as the case where the screen processing unit 204 performs both the high speed conversion processing and the high quality conversion processing described above.

As described above, when the document data is stored, both the original data and the reduced data obtained by reducing the original data by the high-speed reduction conversion method or the high quality reduction conversion method are stored in the storage unit 203 as shown in FIG. To be done.

The document data stored as described above is searched by various search methods such as a search by a headline and a search by a keyword. When the user makes a search request from the input unit 200, the control unit 207 searches the database and obtains the storage information in the storage unit 203 of the reduced data for the document data of the search result (108 in FIG. 2).

Further, the control unit 207 is a transfer control unit 20.
6, the storage unit 203, and the screen processing unit 204 are activated, and based on the stored information obtained from the database, the storage unit 203 reads the reduced data for the document data of the search result, and the screen processing unit via the bus 205. Transfer to 204.
Since the screen processing unit 204 encodes the reduced data, it performs a decoding process, develops it into a dot image, transfers it to the display unit 201, and displays it (109 in FIG. 2). As described above, the method of reading out and displaying the reduced data instead of the original data has a smaller amount of data than the method of reading out and displaying the original data (for example, when the original size is reduced by ½, (Approximately 1/4 compared to data), the time required for transfer processing from the storage section and decoding processing in the screen processing section, which depends on the amount of data, can be greatly shortened. Since the time required for the reduction conversion processing for displaying is not necessary, the search time can be significantly reduced. On the other hand, since both the original data and the reduced data are stored, the number of document data that can be stored in the storage unit is smaller than that in the case where only the original data is stored. If it is reduced to 2, it will be reduced to about 4/5.) If the storage unit is a large-capacity storage device such as a magneto-optical disk device that is often used recently in electronic filing systems, etc., it does not cause much problem. .

In order to effectively use the storage unit, the high-speed reduced data does not have both the high-speed reduced data and the original data in the storage unit, has only the original data, and is retrieved from the original data every time it is searched. A method of displaying in high-speed reduction conversion in real time is conceivable. With this method, there is almost no problem in the time required for reduction conversion due to the high speed, but since the original data is handled, the reduction processing is performed for the transfer processing from the storage unit and the decoding processing in the screen processing unit that depends on the data amount. Compared to the method of displaying, the total search time is not necessarily shortened. From the user's point of view, there is a difference in search time between document data having high quality reduced data and document data having no quality data, which is not preferable in terms of man-machine interface. It should be noted that the above-described method of displaying from the original data is effective if there is a difference in total search time from the method of displaying reduced data, but there is no practical problem.

When the search result is the high-speed reduced data, the subsequent operation differs depending on the activation method of the high-quality reduced conversion for the document data (110, 111, 112 in FIG. 2). When the high quality reduction conversion is automatically started, the control unit 207
After displaying the high-speed reduced data of the search result, searches the database to obtain the storage information on the storage unit of the original data for the document data of the search result. Furthermore, the transfer control unit 20
6. The storage unit 203 is activated, the original data is read from the storage unit 203, transferred to the screen processing unit 204, and the screen processing unit 20
4 request high quality conversion. Screen processing unit 204
Reduces the original data read from the storage unit 203 by the high quality reduction conversion method at the same reduction ratio as the high-speed reduced data (113 in FIG. 2).

Further, the high-quality reduced data obtained as a result of the reduction replaces the high-speed reduced data already displayed on the display unit 201 for display. When the high-quality reduction conversion processing is completed, the screen processing unit 204 notifies the control unit 207 of the irregularity. The control unit 207 deletes the high speed reduced data from the database, newly registers the high quality reduced data in the database, and obtains the storage information on the storage unit for the high quality reduced data. Furthermore, for the screen processing unit 204,
A request for data compression of high-quality reduced data is issued, and the transfer control unit 206 and the storage unit 203 are activated. Under the control of the control unit 207, the transfer control unit 206, the screen processing unit 2
High-quality reduced data compressed by 04
The data is transferred to the storage unit 203 via 05 and stored based on the stored information obtained from the database (115 in FIG. 2).

As described above, the high-speed reduced data on the storage unit is replaced with the high-quality reduced data. However, the physical storage location of the high-speed reduced data and the high-quality reduced data on the storage unit is
Not necessarily the same. When the user interrupts the reduction conversion due to some operation request, the control unit 20
Reference numeral 7 requests the screen processing unit 204 to stop the high quality reduction conversion. The screen processing unit 204 discards the conversion result up to the middle and assumes that the high quality reduction conversion has not been performed.
The high-speed reduced data is restored and displayed (114 in FIG. 2). In this case, since the high-speed reduced data has already been stored in the storage unit, the replacement process in the storage unit is not performed.

When manually invoking the high quality reduction conversion,
The user makes an instruction request from the input unit 200 for high quality reduction conversion. Upon receiving the instruction request, the control unit 207 issues a high quality reduction conversion request to the screen processing unit 204. Subsequent operations are the same as in the case of the above-mentioned automatic start (1 in FIG. 2).
12, 113). The user does not request high quality reduction conversion,
When making any operation request, the control unit 207 terminates the process for the reduced data and performs the process for the operation request (112 in FIG. 2).

As a manual starting method, as described above,
There is a method to perform each search or a method to perform all at once. The batch method is a method of collectively performing high-quality reduction conversion of the entire high-speed reduction data on the storage unit or the high-speed reduction data within the specified range, as designated by the user with a utility command or the like. Specifically, when the control unit 207 receives a batch conversion request from the input unit 200, the control unit 207 searches the database to obtain all document data having high-speed reduced data within the entire range or a designated range, and each time the above-described search is performed. Similar to the case of performing, the high quality reduced data is replaced for each document data. The control unit 207 repeats this operation for the number of high-speed reduced data, and replaces the entire or reduced data within the specified range with high quality reduced data.

If the reduced data for the document data of the retrieval result is high quality reduced data, it is not necessary to improve the quality, and therefore the above-described operation for reduced data is not performed (110 in FIG. 2).

As described above, as shown in FIG. 4, in the storage unit 203, the high-speed reduced data (reduced data #i in the upper portion of FIG. 4) stored in the storage unit 203 at the time of storage or retrieval is It is replaced with high quality reduced data (reduced data #i in the lower part of FIG. 4) by the high quality reduced conversion request.

As described above, the reduced data on the storage unit is automatically replaced by the high quality reduced data due to the high quality conversion request by the automatic or manual activation at the time of storing or searching, and finally, All become high quality reduced data. Since reduced data corresponding to the document data of the search result is displayed at the time of search, high-quality reduced display can be obtained at high speed. The reason why the original data is stored together with the reduced data at the time of accumulation or retrieval is not only because it is necessary to convert the high-speed reduced data into the high-quality reduced data as described above, but also in the reduced display. This is because it is necessary when the unknown part is enlarged and displayed by the original data, when the original data of the document data is communicated to another storage and retrieval device, or when it is output to an output device such as a printer.

[0035]

As described above, according to the present invention,
Not only the document data can be reduced and displayed at high speed, but also high-quality reduced display can be obtained at high speed after high quality reduction conversion by automatic or manual startup when storing or retrieving document data. The advantage is that a display method that simultaneously achieves high quality can be provided.

[Brief description of drawings]

FIG. 1 shows a principle configuration diagram of the present invention.

FIG. 2 is a diagram showing an operation flow of the present invention.

FIG. 3 is a diagram showing a document search device for explaining an embodiment of the present invention.

FIG. 4 is a diagram showing a storage state of document data in a storage unit 203 of FIG.

[Explanation of symbols]

 100 document data input 101 first reduction conversion means 102 second reduction conversion means 103 document data holding unit 104 data processing device 200 input unit 1 201 display unit 202 input unit 2 203 storage unit 204 screen processing unit 205 bus 206 transfer control Part 207 control part

Claims (1)

(57) [Claims] 1. Storage of electronic document data, retrieval,
In a document storage / display processing method of a document retrieval apparatus for displaying, a first reduction conversion unit for reducing and converting document data at low speed but at a high speed; and a slower but higher than the first reduction conversion unit. A second reduction conversion unit for reducing the conversion to quality is provided, and when the document data is stored, both the first reduction data obtained by reducing the document data by the first reduction conversion unit and the original data, or the second reduction data. Both the second reduced data and the original data reduced by the same reduction rate as the first reduced data by the reduction conversion means are stored in association with each other, and further stored in accordance with the subsequent request for high quality. The first reduced data is replaced with the second reduced data reduced at the same reduction rate by the second reduction conversion means and stored, and when the document data is searched, the first or Is a document storage / display processing method characterized in that the second reduced data is read from the storage unit and displayed.