JPH0785008A - Document input preserving and retrieving device - Google Patents

Abstract

PURPOSE:To reduce an image data amount by increasing compressing/expanding speed expansion and improving compressibility of image without lowering retrieval efficiency to accelerate document preserving processing and document display processing by improving compressing/expanding speed. CONSTITUTION:This device is provided with a document input part 101 for inputting a document as the set of a character code and a control code, image extension part 103 for extending code data into image data, data compression part 104 for compressing the image data, data preservation part 105 for preserving the compressed data, data expansion part 106 for reading the preserved data and expanding them into source data, and document display and retrieval part 107 for retrieving target contents by displaying the expanded document data while turning pages. The document input preserving and retrieving device is provided with a code conversion part 102 for suitably converting the correspondent code data so as to improve the compression efficiency of image data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a document input storage / retrieval device for inputting and storing a document as a set of a character code and a control code, displaying it on a screen and searching it.

[0002]

2. Description of the Related Art Generally, a document input storage / retrieval device is realized as a word processor or an electronic filing system with an editing function. Many document retrieval methods allow a rational retrieval by adding a keyword when registering a document. However, since this keyword assignment work is complicated, a simpler document retrieval method is required. Therefore, recently, a document input storage / retrieval device has been introduced which employs a method of visually searching by sequentially displaying a document page by page on the screen without assigning the keyword (herein referred to as page turning display). ing.

An example of the conventional document input storage / retrieval device will be described below with reference to the drawings.

FIG. 8 shows the basic configuration of a conventional document input storage / retrieval device. In FIG. 8, 401 is a document input unit for inputting a document as a set of character codes and control codes, 402 is an image expansion unit for expanding code data into image data, 403 is a data compression unit for compressing image data, and 404 is compression. A data storage unit for storing the stored data, a data decompression unit 405 for reading the stored data and decompressing the decompressed data to the original data, and a document display search unit 406 for retrieving the desired contents by page-displaying the decompressed document data. is there.

With respect to the document input storage / retrieval device configured as described above, the operation in the case of inputting and storing three documents, reading them out, and retrieving an arbitrary document by page turning display will be described with reference to FIGS. 9 and 10. It demonstrates using. Here, each document consists of one page, and the search is performed by, for example, visually observing the layout configuration of the document. FIG. 9 shows an example in which the three documents are displayed by the document display search unit 406.
FIG. 10 shows a character code of a character "decoration", a control code and an example in which the character code is expanded into image data as an example of the character used in the three documents. First, the document input unit 401 inputs the three documents shown in FIG. 9 as a set of character codes and control codes. Here, as indicated by 501, the character “decoration” of the document 2 is “shaded”. Reference numeral 601 indicates that the character code “3E7E” and the shaded control code “01” correspond to this “decoration”. Similarly, FIG. 10 shows examples of other modifications to characters and code data for the modifications. As a document input storage / retrieval device, it is necessary to store this document and display and retrieve it at high speed when a retrieval request is made. Here, in general, if a document is stored as code data, it takes time to develop the read code data into image data for display, and therefore high-speed display search cannot be performed. Therefore, here, the image is expanded by the image expanding unit 402 before the document is stored. Further, in a general document, the image data amount becomes considerably larger than the code data amount, which puts pressure on the storage capacity of the data storage unit. Therefore, the image data is transferred to the data compression unit 40.
3, data is compressed using run length codes such as MH (Modified Huffman) (see "Image Information Compression", Television Society of Japan, Ohm Co., Ltd .: etc.), and then stored in the data storage unit 404. At the time of display, the data decompression unit 405 decompresses the data, and the document display / retrieval unit 406 displays document 1, document 2, and document 3 in this order, one page at a time, as shown in FIG. The target document is searched by visually observing this display.

[0006]

However, in the above configuration, there is a modified display such as shading, which is almost unnecessary in the case of a search by a high-speed page turning display. It complicates the configuration. Therefore, it takes a long time to expand an image, the data compression rate is reduced, the amount of image data stored in the data storage unit cannot be reduced, and the compression / decompression speed is reduced. Therefore, the document storage processing and the document display processing are accelerated. It had a problem that it could not be done.

In view of the above problems, the present invention omits detailed image information such as decorations that are not necessary in a document search by high-speed page turning display, thereby speeding up image expansion and improving the compression ratio to improve image data. An object of the present invention is to provide a document input storage / retrieval device that reduces the amount and improves the compression / decompression speed to speed up document storage processing and document display processing.

[0008]

In order to solve the above problems, a document input storage / retrieval device of the present invention displays a document input section for inputting a document as a set of character codes and control codes, and an input document. An image decompression unit that decompresses code data into image data, a data compression unit that compresses the image data, a data storage unit that stores the compressed data, and a data decompression unit that reads the stored data and decompresses it to the original data. And a document display search unit for displaying the decompressed data as a document and searching for a desired content, and a code conversion unit for replacing a specific one of the code data input by the document input means with another code data. It has a structure of having.

[0009]

In view of the above problems, the present invention speeds up image expansion and improves compression ratio by omitting detailed image information such as decorations that are unnecessary in document retrieval by high-speed page turning display. The amount can be reduced, the compression / decompression speed can be improved, and the document storage process and the document display process can be speeded up.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A document input storage / retrieval apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the basic configuration of a document input storage / retrieval apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a document input unit for inputting a document as a set of character codes and control codes, and 102 is suitable for code data so as to improve the speed of decompressing corresponding image data and the compression efficiency of the image data. A code conversion unit for conversion, 103 is an image expansion unit that expands the converted code data into image data, 104 is a data compression unit that compresses the image data, 105 is a data storage unit that saves the compressed data, and 106 is A data decompression unit that reads the stored data and decompresses the original data, and a document display search unit 107 that searches the desired contents by page-displaying the decompressed document data.

With respect to the document input storage / retrieval apparatus configured as described above, the operation in the case of inputting and storing three documents and then searching for an arbitrary document by page turning display will be described with reference to FIGS. explain. Here, each document consists of one page, and the search is performed by, for example, visually observing the layout configuration of the document. 2 and 3 are examples of the contents of the document, FIG. 2 is an image display of the input result as it is, and FIG. 3 is an example of a part of the document 2 which is code-converted and then displayed by the document display search unit 107. 4 to 7 are examples of code data conversion by the code conversion unit 102. FIG. 4 is a case in which modification or size change is canceled, FIG. 5 is a case in which small characters and symbols are deleted, and FIG. When changing, FIG. 7 shows a case of changing to a similar character with low complexity.

First, the document input unit 101 inputs the three documents shown in FIG. 2 as a set of character codes and control codes. Here, the characters in the frame 201 of the document 2 are subjected to a modification process such as “shading”. As a document input storage / retrieval device, it is necessary to store this document and display and retrieve it at high speed when a retrieval request is made. Here, generally, if there are many types of control codes, it takes time to develop the code data into image data for display. Therefore, if the document is stored as the code data, high-speed display search cannot be performed. Therefore, here, the image expansion unit 103 expands the image before saving the document. Further, in a general document, the image data becomes much larger than the code data, which puts pressure on the storage capacity of the data storage unit. Therefore, the image data is compressed by the data compression unit 104 using encoding such as run length code such as MH (Modified Huffman), and then stored in the data storage unit 105. At the time of display, the data decompression unit 106 decompresses the data, and the document display retrieving unit 107 displays document 1, document 2, and document 3 in this order, one page at a time, as shown in FIG. The target document is searched by visually observing this display.

Here, by performing code conversion as shown in FIG. 4 by the code conversion unit 102 before image development, the character decoration is released as shown in the frame 202, and the complexity of the image data is reduced. To do. It should be noted that the types of code conversion may be the cases of FIGS. 5 to 7 in addition to FIG. Fig. 4 shows the case of canceling decoration or resizing
Fig. 5 shows the case of deleting small characters and symbols, Fig. 6 shows the case of changing Chinese characters into abbreviations, and Fig. 7 shows the case of changing similar characters with low complexity. In either case, the visual search is greatly affected. It is possible to reduce the complexity of the image data without giving

As a compression algorithm, in addition to MH, Modified Read (Modified Read, hereinafter referred to as MR) and Modified Mod.
If "Readed Read" (Modified Modified Read, hereinafter referred to as MMR) is also considered.

Further, the contents of interest in the visual document search may be anything other than the layout.

The document display method is not limited to one page per one screen, and may be reduced display or partial display, or a plurality of pages may be displayed on one screen.

[0018]

As described above, according to the present invention, before the code-input document is developed into image data, the complexity of the characters used within the range that does not reduce the efficiency of the visual flip display search can be reduced. By performing code conversion so as to lower the speed, the image expansion can be speeded up, the compression rate can be improved to reduce the image data amount, and the compression / decompression speed can be improved to speed up the document saving process and the document displaying process.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a document input storage / retrieval device according to the present invention.

FIG. 2 is a diagram showing an example of document display in a document display search unit in the embodiment.

FIG. 3 is a diagram showing an example of document display in the document display search unit.

FIG. 4 is an example of contents of code conversion performed by a code conversion unit in the embodiment.

FIG. 5 is a diagram showing an example of contents of code conversion performed in the code conversion unit.

FIG. 6 is a diagram showing an example of contents of code conversion performed in the code conversion unit.

FIG. 7 is a diagram showing an example of contents of code conversion performed in the code conversion unit.

FIG. 8 is a block diagram showing a configuration of a conventional document input storage / retrieval device.

FIG. 9 is a diagram showing an example of document display in a document display search unit of a conventional document input saving / searching device.

FIG. 10 is a diagram showing an example of a code input by a document input unit of a conventional document input storage / retrieval device.

[Explanation of symbols]

 101 document input unit 102 code conversion unit 103 image decompression unit 104 data compression unit 105 data storage unit 106 data decompression unit 107 document display search unit

Claims (2)

[Claims] 1. A document input unit for inputting a document as a set of character codes and control codes, an image expansion unit for expanding code data into image data for displaying the input document, and the expanded image data as a document. A document having a document display / retrieval unit for displaying and retrieving a desired content, and having a code conversion unit for replacing a particular one of the code data input by the document input means with another code data. Input save search device. 2. A document input section for inputting a document as a set of character codes and control codes, an image expanding section for expanding code data into image data for displaying the input document, and a data compression for compressing the image data. Unit, a data storage unit that stores compressed data, a data decompression unit that reads the stored data and decompresses it to the original data, and a document display search unit that displays the decompressed data as a document and searches for the desired content. On the other hand, the document input storage / retrieval device characterized by having a code conversion unit for replacing a specific one of the code data input by the document input means with another code data.