JPH0535842A - Image storing device - Google Patents

Abstract

PURPOSE:To prevent an image from being recorded in a recording medium while keeping the image tilted and to neatly arrange documents by performing the corrective conversion of the tilt of the image stored in a page memory corresponding to the tilt of the image detected from ruled lines within the image. CONSTITUTION:Plural sheets of an original are set to a scanner device 18 with an ADF, and a CPU 34 operates an optical disk device 22 and a scanner device 18. The scanner device 18 scans each image set composed of sentences, etc., in 2-D and converts them photoelectrically. The line information of the photoelectrically converted image is stored in a page memory 40 in order. As to the images stored in the page memory 40, the tilt, that is, tilting angle is detected from the tilting angle of the ruled lines within the image. When the tilting angle exceeds a prescribed angle, the corrective conversion of the images stored in the page memory 40 is performed corresponding to the tilting angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image storage device such as an image filing device for registering and searching images.

[0002]

2. Description of the Related Art In recent years, a scanner (two-dimensional scanning device) reads an image of a large amount of documents (documents) and the like,
An image filing device for storing the read image on an optical disc, searching for and reading out the stored image, and outputting the image in a state that can be visually recognized by an output device such as a CRT display device or a recording device has been put into practical use. ing.

In such an apparatus, a document is read by a scanner with an ADF (automatic paper feed) mechanism and registered on an optical disk. However, some documents are read by the scanner in a state where the mount is tilted. It will be automatically registered as it is. In this case, even if the document is registered on the optical disk, if the retrieval and the printer output are performed again, some of the called documents are output in a tilted form. In such a device, even if the document is registered and managed by using the image filing device, there is a problem that it cannot be said that the document management is properly performed.

[0004]

As described above, there is a problem in that an image is registered in a storage medium while having an inclination, so that orderly document management cannot be performed. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an image storage device which can prevent an image from being registered in a storage medium while having an inclination and can perform orderly document management.

[0005]

SUMMARY OF THE INVENTION An image storage device according to the present invention comprises a supply means for supplying an image, a page memory for storing the image supplied by the supply means, and an inclination of the image stored in the page memory. A detection unit that detects the inclination of the ruled line in the image, a conversion unit that corrects and converts the inclination of the image stored in the page memory according to the inclination detected by the detection unit, and an image that is corrected and converted by the conversion unit. It is composed of storage means for storing in a storage medium.

[0006]

According to the present invention, the image supplied by the supply means for supplying the image is stored in the page memory, the inclination of the image stored in the page memory is detected from the inclination of the ruled line in the image, and this detection is performed. According to the tilt, the tilt of the image stored in the page memory is corrected and converted, and the corrected image is stored in the storage medium.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a structural example of an image storage device of the present invention, for example, an electronic filing device. That is, the electronic filing device includes a control module 10, a memory module 12, an image processing module 14, a communication control module 16, a scanner device 18, and an optical disk 20.
The optical disk device 22, the keyboard 23, the CRT display device 24, the printer device 25, the magnetic disk 26 and the magnetic disk device 27, the mouse 29, the system bus 30, and the image bus 32 are included.

The control module 10 includes a CPU 34 that performs various controls for image storage, retrieval, edit processing, and the like.
And the optical disk device 22, the magnetic disk device 27 and C
The interface circuit 36 connects the PU 34. A keyboard 23 and a mouse 29 are connected to the CPU 34.

The memory module 12 stores various control programs for image storage, retrieval, editing, image inclination angle determination, correction processing, and management information.
8, a page memory 40 as an image memory having a storage capacity corresponding to an image of several pages of A4 size document, a display memory 42 as a display interface, a display control section 44, and the like. Page memory 40
A buffer memory area 40a is provided in a part of the area. The page memory 40 is a memory that temporarily stores, for example, an image stored in the optical disc 20 or an image read from the optical disc 20.

The display memory 42 is for temporarily storing an image displayed by the CRT display device 24. In the display memory 42, an image actually displayed in the display window of the CRT display device 24, for example, an image from the page memory 40 or an image from the buffer memory 40a is enlarged, reduced, rotated, inserted or inserted. An image subjected to black-and-white reversal or the like is stored. The display control unit 44 controls the display processing of the CRT display device 24 and the like.

The image processing module 14 includes an enlarging / reducing circuit 46 for enlarging and reducing an image, a vertical / horizontal converting circuit 48 for rotating an image, and an encoding process for compressing an image (reducing redundancy). A compression / decompression circuit (CODEC) 50 for performing a decoding process for applying and decompressing (recovering reduced redundancy), a scanner interface 52 for the scanner device 18, a printer interface 54 for the printer device 25, and scaling. The internal bus 56 connects the circuit 46 and the vertical / horizontal conversion circuit 48, the compression / expansion circuit 50, the scanner interface 52, and the printer interface 54. The compression / decompression circuit 50 uses the MH (Modified Huffman) method, the MR (Modified Read) method, or the like to perform band compression,
Alternatively, band expansion is performed.

The communication control module 16 is, for example, an LA.
It is configured by a communication interface 58 such as a BCP (Bus Communica-tion Processor) connected to the N.
Further, the communication control module 16 is connected to an external device such as a FCP (facsimile connection mechanism) or a personal computer through an interface, and a UCP (Universal Communication).
Processor) may be provided.

The system bus 30 is a bus for control signals of various devices, and connects the control module 10 with the memory module 12, the image processing module 14, and the communication control module 16. The image bus 32 is an image bus, and connects the memory module 12, the image processing module 14, and the communication control module 16.

The scanner device 18 is, for example, a two-dimensional scanning device, which obtains an electric signal corresponding to an image on a document by scanning a document (document) two-dimensionally with a laser beam light. It is a scanner with a paper mechanism.

The optical disk device 22 is a scanner device 18.
The images read by the method are sequentially stored in the optical disc 20. In addition, the optical disc 20 is searched for an image corresponding to the search code designated by the keyboard 23 or the like.

The keyboard 23 is used to input a unique search code corresponding to an image stored on the optical disk 20 and various operation commands such as storage, search, and edit processing. In addition, the mouse 29 moves the cursor (not shown) displayed on the display window of the CRT display device 24, for example, vertically and horizontally to give an instruction at a desired position so that the cursor is positioned. The display contents (various operation modes, area designation or icon for image editing, etc.) are selected or designated.

The CRT display device (cathode ray tube display device) 24 displays the image read by the scanner device 18 and the image retrieved from the optical disk 20. Icons and the like are displayed at the upper end, the lower end, and the right end on the display window of the CRT display device 24.

The printer device 25 prints out (hard copy) the image read by the scanner device 18, the image retrieved from the optical disk 20, or the image displayed on the CRT display device 24.

The magnetic disk device 27 stores various control programs on the magnetic disk 26 mounted on the magnetic disk device 27, and also stores a search code input from the keyboard 23 and an image corresponding to the search code. The search data (search information) including the storage address on the optical disc 20, the image size, the search frequency, and the like is stored.

The search data is managed by a document management table, which is composed of a title management table, a page management table, and a record management table. The title management table stores one document number corresponding to each search code (image name) composed of a plurality of search keys. In the page management table, record numbers are stored page by page of one document, and one record number is stored corresponding to each page. In the record management table, the storage address (storage start position) of the image on the optical disc 20 for each record number,
Document size (image size), image attributes such as compression method and resolution, and search frequency (access frequency) are stored. The storage address is a logical address, and a physical track address and a physical sector address are calculated from this at the time of access. Next, the operation of image storage and retrieval processing in the electronic filing apparatus having such a configuration will be described.

First, the image storing process will be described with reference to the flowchart shown in FIG. For example, now
The registration mode is selected and set using the keyboard 23, and a plurality of search codes for images to be stored in the optical disc 20 are input. This search code is composed of a plurality of search keys, and the contents of the items of this search key are set in advance. The CPU 34 checks the validity of the input search code in accordance with a predefined format. Further, the double registration is checked by comparing with the search code already registered in the optical disc 20. The input search code is stored in the main memory 13 according to the result of this check.

Next, a plurality of originals are set on the scanner device 18 with an ADF, and the CPU 34 causes the optical disk device 2 to operate.
2 and the scanner device 18 are operated. The scanner device 2 two-dimensionally scans and photoelectrically converts each image of a set document or the like. The line information of the photoelectrically converted image is sequentially stored in the page memory 40. The inclination, that is, the inclination angle of the image stored in the page memory 40 is detected from the inclination angle of the ruled line in the image. When the tilt angle is equal to or larger than the predetermined angle, the image stored in the page memory 40 is corrected and converted according to the tilt angle of the image. That is, the ruled line detection method is used to detect the inclination angle of the ruled line from a document in which there are several ruled lines as shown in FIG.

For example, for a signal sequence of "1" and "0" of an image for one page stored in the page memory 40 (X direction, Y direction), a detection region consisting of a plurality of columns is provided, When there is even one row in which y1 to yn are all “1” (in the case of FIG. 4), there is no inclination (tilt angle =
0), and if the above conditions are not satisfied (in the case of FIG. 5), it is determined that it is inclined.

When it is judged that the tilt is present, as shown in FIG. 5, (x1, z1), (xj, zj),
The angle is detected by interpolating into a single straight line passing through the point (xn, zn). For example, (x1, z1), (xn, z
n) coordinate points, tan (zn-z1) / (xn-x
1) is obtained as the tilt angle. The distance between the detection points (z1, zn, etc.) is a predetermined distance.

As described above, when the inclination angle of the ruled line is detected, the CPU 34 determines whether or not the inclination angle is equal to or larger than a predetermined angle, and when the inclination angle is within the predetermined angle, the image inclination angle correction process is performed. Instead, when the inclination angle is within a predetermined angle, the image inclination angle correction process is performed.

When the image tilt angle correction processing is performed, the CPU
Reference numeral 34 stores in the page memory 40 image data obtained by rotating an image for one page stored in the page memory 40 by an angle for correcting the tilt angle using affine transformation or the like.

The image stored in the page memory 40 is stored in the display memory 42 and displayed on the CRT display device 24 or printed out by the printer 25.

The image stored in the page memory 40 is band-compressed for each line information by the CPU 34 in a compression / decompression circuit (CODEC) 50 by a well-known MR (Modified Read) method or the like and encoded. .. The encoded image is supplied to the optical disc device 22 and stored in the optical disc 20.

When the storage of the image on the optical disk 20 is completed, the CPU 34 stores a logical address determined from the physical track address and the physical sector address where the image is stored,
The image length represented by the block length, the image attribute, and the like are stored in the main memory 38 in association with the search code (search information). Then, the CPU 34 supplies the search data stored in the main memory 38 to the magnetic disk device 27. As a result, the magnetic disk device 27 stores the supplied search data in each table in the magnetic disk 26. Further, when another document is read by the scanner device 18, the same processing as described above is performed.

As described above, when the image read by the scanner device 18 is tilted as shown in FIG. 6B with respect to the image before registration as shown in FIG. 6A. As shown in FIG. 6C, the image is registered in the optical disc 20 as an image in which the tilt angle is corrected.

As a result, when a large amount of documents are registered by the scanner device 18 using the ADF, it is possible to eliminate the distortion of the original document and perform automatic registration, and it is possible to perform orderly document management with the images registered on the optical disk 20.

Next, the search processing of the image stored in the optical disk 20 will be described. First, the search mode is set by the keyboard 23, and the search code corresponding to the image to be searched is input. The CPU 34 sequentially compares and collates the input search code with the search code stored in the title management table of the magnetic disk 26, and sequentially checks whether or not the search code that matches the input search code is stored. Extract the relevant document number.
As a result, the CPU 34 stores the extracted candidate document numbers in the main memory 38.

Then, the CPU 34 refers to the document numbers of the candidates in the main memory 38, creates a list (search code) of the relevant documents with the data read from the title management table, and uses the CRT display device 24. indicate. With this display, if the document for which the operator is to be searched cannot be found, the search code is input again. If found, the image to be searched is specified from the list (specified by the document number, etc.) and the search execution is instructed.

The CPU 34 reads the record number corresponding to the designated image using the page management table of the magnetic disk 26, reads the logical address corresponding to the read record number from the record management table in the magnetic disk 26, The physical track address and the physical sector address corresponding to this address are calculated, and the image including the search code from the optical disc 20 is reproduced by the optical disc device 22 using these addresses.

The CPU 34 also supplies an image (compression information) for each scanning line supplied from the optical disk device 22 to the compression / expansion circuit 50, performs band expansion processing, and sequentially supplies it to the page memory 40. The image stored in the page memory 40 is reduced by the enlargement / reduction circuit 46 and output to the display memory 42, and the image is stored in the display memory 42. Therefore, the display control unit 44 controls the display memory 4
The stored contents of No. 2 are displayed on the CRT display device 24. As described above, it is possible to eliminate the inclination of the mount when registering a document (document) in the optical disc, and perform orderly document management.

[0037]

As described in detail above, according to the present invention,
It is possible to provide an image storage device which can prevent documents from being registered in a storage medium while having an inclination and can perform orderly document management.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an electronic filing device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining image storage processing of the apparatus of FIG.

FIG. 3 is a diagram for explaining an example of a document in which ruled lines are present at several places.

FIG. 4 is a diagram for explaining ruled lines in a non-tilted state.

FIG. 5 is a diagram for explaining a state in which a ruled line is inclined and detection of an inclination angle of the ruled line.

6A and 6B are views for explaining an image before registration, a tilted read image, and an image in which a tilt angle is corrected.

[Explanation of symbols]

18 ... Scanner device, 20 ... Optical disk (storage medium),
34 ... CPU, 40 ... Page memory.

Claims (1)

Claim: What is claimed is: 1. A supply means for supplying an image, a page memory for storing the image supplied by the supply means, and an inclination of the image stored in the page memory for a ruled line in the image. Detecting means for detecting the inclination of the image stored in the page memory according to the inclination detected by the detecting means, and an image corrected and converted by the converting means in a storage medium. An image storage device comprising: a storage unit that stores the image.