JPS6336667A - Mark information read control device - Google Patents

Abstract

PURPOSE:To read the information required for registration and management of a document sheet only accurately by identifying frame information with information marked actually in an area surrounded by the frame information. CONSTITUTION:The data compression means 13 being a 1st arithmetic processing means applies prescribed AND operation in the main scanning and the sub scanning of picture data subjected to compression processing into the picture data read by a reader section 1. After the end of AND processing, an isolate point eliminating means 14 being a 2nd operation processing means uses the compression means 13 to apply prescribed OR and AND processing alternately in the main and sub scanning direction of the picture data based on the output change in the operation data subjected to AND operation. Thus, only the information required for the registration and management of the document sheet is read accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mark information reading control device that is printed to add read information to a document sheet registered in an electronic filing system.

[Conventional technology]

Conventionally, in this type of electronic filing system,
It is configured such that a large amount of information is registered on a recording medium such as an optical disk, and the registered information, such as documents or images, can be read out at any time by inputting the readout information (key food) added at the time of registration. There is.

In this case, the information to be registered (sheet-like or book-like) is optically read by an image reader (optical scanner) and binarized, and then the operator inputs the key food from the L stage of the input car such as a keyboard. Create a type in which operations are performed for each information to be registered and a key food file for the document file to be registered in advance, read the document file from Image League, and when 9 readings are completed, the operator performs the above-mentioned procedure. There was a type that linked the relationship between keyword files and document files.

[Problem that the invention seeks to solve]

Therefore, in the former case, when registering multiple documents, the operator must perform a key operation to add a keyword to each document, resulting in a significant drop in document registration efficiency. was there. Regarding the latter, although multiple documents can be input at once, the operator must link the keywords for each document after input, and the time required to register documents in electronic filing is longer than the time required to retrieve documents. There was a problem that it took a considerable amount of time compared to the time required.

In order to improve these problems, a system has been proposed in which keywords are input using a reading device such as an optical mark reader or an optical card league, and a document file is input at the same time. This creates new problems, such as the need for a reading device and special paper, which significantly increases the total cost.

This invention was made to solve the above problems, and includes frame line information that serves as a guide for inputting images on the optical mark reading sheet that is output as an image, and an area surrounded by this frame line information. It is an object of the present invention to provide a mark information reading control device that can accurately read only the information necessary for document sheet registration and management by identifying marked information.

[Means for solving problems]

The mark information reading control device according to the present invention includes: a first arithmetic processing means that performs a predetermined AND arithmetic processing on the main scanning and sub-scanning directions of image data compressed and output from the image reading means; A predetermined logical sum calculation process and a logical product calculation process are performed alternately in the main scanning and sub-scanning directions of the image data based on the output change of the calculation data that has been subjected to the predetermined logical product calculation process by the first calculation processing means. A second arithmetic processing means is provided.

[Effect]

In this invention, the first arithmetic processing means performs a predetermined logical product operation in the main scanning and sub-scanning directions of the image data compressed into the image data read by the image reading device, and this logical product calculation process is completed. After that, the second arithmetic processing means performs a predetermined logical sum operation on the main scanning and sub-scanning directions of the image data based on the output change of the calculated data subjected to the predetermined logical AND processing by the first arithmetic processing means. Processing and logical product processing are performed alternately.

〔Example〕

FIG. 1 is an external view illustrating the configuration of an electronic filing device showing an embodiment of the present invention, in which a beam 1 is used to transport a document sheet conveyed by an automatic document feeder (ADF) 2 or an optical file system to be described later. The scanning speed of the optical scanning unit (described later) or the automatic document transport is determined based on the first identification stage 11 (described later) that optically reads the mark reading sheet and identifies both sheets, and the identification information output from this identification means 11. Control means 12 (described later) for controlling the document conveyance speed of the device 2
, a data compression means 13 (first arithmetic processing means), an isolated point removal means 14 (second arithmetic processing means), etc. of the present invention. Note that the identification means 11[deg.] control means] 2 is provided in the reader interface section 21, and this control means 12 also serves as the reading control means and mark position 1δ calculation means of the present invention.

Reference numeral 3 denotes a printer section TE1 which serves as an image output means of the present invention, and is constituted by, for example, a laser beam printer.

Reference numeral 4 denotes a paper feed section that outputs a sheet-shaped recording medium to an image forming section inside the printer. Reference numeral 5 denotes a workstation unit serving as an editing means of the present invention, including an image registration unit 5a that accommodates an optical recording medium constituted by an optical disk, a keyboard 5b for inputting operation commands, a pointing device 5c, and an image read from the league unit 1. It consists of a bitmap display 5d that displays document images as rask images, etc., and is connected to the printer section 3 and the league section 1 through a communication line 6.7. Note that the workstation section 5 includes each section 5a to 5d and a printer section 3.
．． It has a control unit (CPU) that comprehensively controls the reader unit 1 and the like.

FIG. 2 is a cross-sectional view illustrating the structure of the cross section 1 shown in FIG. 1, and the same parts as in FIG. 1 are given the same reference numerals.

In this figure, 1a is a light source, and document sheets or optical mark reading sheets (hereinafter referred to as OM
(referred to as the R sheet) is irradiated with light. A reading sensor 1b receives reflected light from the light source 1a. lc and ld are scanning mirrors that pass one reflected light through an optical lens 1e to image optical information on an image pickup element (line sensor) If constituted by a COD, for example. An image processing section 1g performs predetermined processing on the image information output from the line sensor 1f, such as halftone processing (dither processing).

Binarization processing is performed based on the slice level, which will be described later, and the information is transferred to the workstation section 5 via the reader interface section 21.

Reference numeral 2a denotes a document tray, in which document sheets (indicated by broken lines) and OMR sheets (indicated by solid lines) are stacked and stacked, and are automatically conveyed sequentially starting from the bottom sheet.

Note that the ADF 2 is configured to automatically transport the sheet to the document table, and the optically scanned sheet is automatically ejected.

Further, the reading sensor 1b and the light source 1a constitute an optical scanning section, and this optical scanning section moves in the direction of the arrow.
Read the sheet placed on the platen.

FIG. 3(a) is a cross-sectional view of a laser beam printer showing an example of the printer section 3 shown in FIG. 1, and parts that perform the same functions as those in FIG. .

In this figure, 3a is a laser unit that modulates the conductor laser on/off based on image information sent from the printer interface section 22. A scanning mirror 3b irradiates the photosensitive drum 3C with a laser beam LB deflected by a polygon mirror (not shown) provided in the laser unit 3a to form an electrostatic latent image. A developing device 3d develops the electrostatic latent image formed on the photosensitive drum 3C with a developer (toner) to make it visible. Reference numeral 3e denotes a transfer charger that transfers a toner image onto the recording paper fed from the paper feed section 4. 3f is a conveyor belt, which transports the recording paper that has been transferred in the direction of the dotted arrow. 3g is a fixing roller, which fixes the toner image transferred to the recording paper onto the recording paper and discharges the paper to a paper output tray. .

3h is a skew conveyance detector that irradiates light onto the recording paper fed from the paper feed section 4, receives the reflected light, determines the skewed state yE of the recording paper, and detects the skewed state at the printer interface section. 2
Transfer to 2. This allows the printer interface section 2
The address of the image information is normalized so that the image information transferred to No. 2 is printed vertically and horizontally in the upper row on the recording paper that is glidingly conveyed. A line sensor 31 transfers light reflected from the toner image transferred to the recording paper, that is, print information, to the printer interface unit 22.

As a result, the printer interface section 22 compares (verifies) whether the input image information and print information match, and if the two are significantly different, issues a command to output the image information again. Note that it is not necessary to submerge both the line sensor 31 and the skew conveyance detector 3h; by providing one or the other, the editing information created by the workstation section 5 or the image information read by the reader section 1 can be The information can be output accurately onto the conveyed recording paper, and one reading sensor 1b provided in the reader section 1 can correctly determine the management information of the document sheet.

FIG. 3(b) is a sectional view showing a case where the printer unit 3 shown in FIG. The same symbols are attached. Note that this color laser beam printer supports cyan (C), magenta (M),
It is configured so that a multicolor image can be formed by transferring yellow (Y) and black (K) color toners onto a conveyed recording paper.

FIG. 4 is a control block diagram illustrating the control 2JB configuration of the e-f file system shown in FIG. 1.

Components that are the same as those in FIGS. 1 and 2 are given the same reference numerals.

In this figure, 23 is, for example, Motorola (7) 6
An 8000 (32-bit) CPU controls each part based on a control program stored in the ROM 24. Note that the CPU 23 controls each part using a UNIX operating system (OS), such as SYS TEMV, which resides in a specific area of the ROM 24.

25 is a line for workstation section 5. Printer section 3. Communicate information with League Division 1. An image memory 26 stores binary image information of the document sheet read from the league section 1. 27 is mark information memory,
Address information of various timing marks printed on the OMR sheet, which will be described later, is stored. 28 is video ram (VR
AM), compressed data obtained by thinning out the binary image information stored in the image memory 26 at a predetermined ratio is stored and transferred to the bitmap display 5d. Reference numeral 29 denotes an input/output interface section which receives operating input from the keyboard 5b and pointing device 5C through the pass line 2.
5 to the CPU 23. Reference numeral 3o denotes an optical disk interface section that reads information written on the optical disk stored in the image registration section 5a or writes compressed data of binary image information stored in the image memory 26 from the CPU 23 via the pass line 25. Control is performed based on the transferred control command. 31 is an ADF controller, which handles the document sheet or OMR conveyed from ADF2.
Controls sheet transport and transport speed.

FIG. 5 is a control block diagram for controlling the printer section 3 shown in FIG. 1, and the same components as in FIG. 3(a) are given the same reference numerals.

In this figure, 41 is a CPU that controls each part of the printer based on a control program stored in a ROM (not shown). An image memory 42 temporarily stores image information transferred via the printer interface section 22. 43 is a bus, 44 is an I10 controller, and a control signal for correcting the storage address of the image information stored in the image memory 42 based on the recording paper skew state signal output from the skew conveyance detector 3h. is sent to the CPU 41. Furthermore, it is determined whether the read image output from the line sensor 31 matches the image information written in the image memory 42, and if the two signals are significantly different, the image information stored in the image memory 42 is re-imaged. It commands the CPU 41 to output, and also sends drive commands to the paper feed conveyance system 45 and the laser unit 3a.

Next, the OMR sheet creation operation will be explained with reference to FIG.

FIG. 6 shows the O output from the printer section 3 shown in FIG.
FIG. 51 is a schematic diagram explaining the MR sheet format.
is the OMR sheet, 52 is the OMR sheet mark, and this
The league unit 1 reads the MR sheet mark 52 to identify the document sheet and the OMR sheet 51, and also functions as a skew state detection mark when the document sheet is automatically conveyed from the ADF 2. Reference numeral 53 indicates an identification pattern, which serves as address information for the timing mark string 54 and character code string 55. Based on this address information,
Conveying speed or league part 1 automatically conveyed from ADF2
This address information is used to vary the scanning speed of the scanning system that optically scans the OMR sheet 51 placed on the platen. A mark area 56 is an area where the operator marks information necessary for reading the document sheet. 57
is a password area, which is information linked to the mark area 56. 58 is a character code mark area, by marking each area with a writing instrument.

The league section 1 can read alphanumeric characters as shown in FIG. 7 as vector information.

Bitmap display 5 of workstation section 5
For example, the OMR sheet 51 (7y
file name; Library) (7) When the image information (vector information <) is converted to rask image information via the printer interface unit 22 and taken into the image memory 42 of the printer unit 3, the CPU 41 transfers the information to the paper feed conveyance system 45. A drive command for feeding the cut sheets stored in the paper feeding section 4 is sent out. In response to this, the paper feed roller 4a is driven and the paper is fed in the direction of the dotted arrow shown in FIG. Each mark information, such as an OMR sheet mark 52. which serves as an identification mark, is transferred to the I10 controller 44 shown in FIG. Identification pattern 53. Timing mark string 542 character coat J1155, mark area 56. The storage addresses of the image memory 42 (shown in FIG. 5) where the dot data of these marks and patterns are stored are normalized so that the password area 572 and character code mark area 58 are printed. When this normalization is completed and the latent image position and the timing for inputting image 1 of cut sheet 7 are determined, conveyance of the cut sheet, which had been temporarily stopped, is started, and the I10 controller 44 is transferred to the image memory. The semiconductor laser housed in the laser unit 3a is on/off modulated based on the dot data read from the dot data 42, thereby forming an electrostatic latent image on the photosensitive drum 3C shown in FIG. 3(a). This latent image is developed by a known electrophotographic process and transferred onto a cant sheet by a transfer charger 3e. Next, the toner image transferred to the cut sheet (each OMR sheet mark 52, identification pattern 53° timing mark string 542 character code string 55.
Mark area 56. The password area 571 (character code mark area 58) is converted into an electrical signal by the line sensor 31, transferred to the I10 controller 44, and checked (verify check) to see if it matches the image information stored in the image memory 42. If the two signals are significantly different, the I10 controller 44
41 to transfer the image from the image memory 42 again.

This allows the reading sensor 1b of the reader section 1 (shown in FIG.
The timing mark string 54 can be read exactly once, and its address information is stored in the mark information memory 27.

When the reading sensor 1b of the reader section 1 reads the OMR sheet 51, the keyboard 5 of the workstation section 5
b. When a conformity check command is input using the pointing device 50 or the like, the reader interface section 21 displays the timing mark string 5 read by the reading sensor 1b.
It is now possible to check whether 4 is affected by other *7\ status and becomes difficult to read.
The fatigue and conformity state of the OMR sheet 51 is checked, and each OMR sheet mark 52. of the OMR sheet 51F is checked by this check. Identification pattern 53. Timing mark row 54
2-character code string 55. If it is determined that there is a problem in reading the mark area 56, password area 579, character code mark area 58, a warning is displayed on the bit map display 5d of the workstation unit 5.

In addition, if the OMR sheet 51 is registered with the file name Library mentioned above, by inputting the file name manually from the keyboard 5b of the workstation section 5, the registration form ! - You can check the one-to-one correspondence with the keywords inside and accurately judge the registration status of the keyword.

Further, when or when the MR sheet 51 is conveyed from the ADF 2, the OMR sheet mark 52 on the north side of the OMR sheet 51 is detected to detect the skew amount of the OMR sheet 51, and the OMR sheet 51 is read and the document sheet is read. Control read operations.

Next, the OMR seam by the reader section 1 shown in FIG.
The read control operation of No. 51 will be explained.

In this embodiment, when reading the MR sheet 5, it is configured to be able to read in two different ways.

The first method is to turn on the light source 1d and read the reflected light and detect it with the sensor 1b before the OMR sheet 51 conveyed from the ADF 2 shown in FIG. 2 is placed on the platen of the reader section 1. Then, based on the detection output, the transport speed of the MR sheet 51 is varied, and the marked image information is converted into an electrical signal by the image sensor 1r and output to the image processing section 1g. As a result, it is possible to increase the processing efficiency of OMR sheet reading and Bungetsu sheet reading.

The second method is to transport the OMR sheet 51 from the ADF 2 shown in FIG. 2 onto the platen of the league section 1 at a constant speed and place it on the platen. By pre-scanning, OMR
The sheet 51 and the document sheet are identified, and the detected addresses of each mark are registered in the mark information memory 27 shown in FIG. 4, and the marks stored in the mark information memory 27 during the second scanning are The scanning speed of the optical scanning system is varied according to the address, the mark information on the OMR sheet 51 is detected by the reading sensor 1b, and the detection output, that is, the marked image information, is converted into an electrical signal by the image sensor 1f to form an image. It is output to the processing section 1g.

First, mark reading control on the OMR sheet 51 by the first method will be explained.

With the document sheet and OMR sheet 51 placed on the document tray 2a as shown in FIG. 2, when an image reading command is input from the workstation unit 5 to the ADF controller 31 shown in FIG. A drive signal for conveying the lowermost sheet is output to the ADF 2.

At this time, the ADF controller 31 outputs a command to the league section to move the optical scanning system to a predetermined position and stop it, and to turn on the light source 1a. Therefore, when the sheets being conveyed in sequence pass over the reading sensor 1b, the image information is converted into an electrical signal by the image sensor 1' and output to the league interface unit 21, and the identifying means 11 identifies the conveyed sheets as documents. It is identified whether it is a sheet or an OMR sheet 51, and O
When it is determined that the OMR sheet 51 is the MR sheet 51, the control means 12 causes the ADF controller 31 of the league section 1 to send the OMR sheet 5.
A signal is sent to cause the conveyance speed of the document sheet to be lower than that of the document sheet (2/3 times the conveyance speed of the document sheet). In parallel with this, the reader interface section 21 sends the image processing section 1g shown in FIG. Set to "32", which corresponds to 1/2 gradation of . In this state, the OMR being transported
Binarization of the sheet 51 is performed, but when the timing mark row 54 on the OMR sheet 51 is roughly detected, the reader interface section 21 issues a command to change the slice level for binarization to "20" through image processing. Output to section 1g. This is because the density marked in the mark area 55 of the OMR sheet 51 is often marked with a writing instrument such as a pencil. In this manner, the mark information on the OMR sheet 51 is read by varying the slice level to the Guinamink, and the information necessary for reading the document sheet is notified to the reader interface unit 21.

This allows it to be determined whether the next document sheet conveyed from the ADF 2 is an image or character data, and if it is single image data, the dithered image information is stored in the image memory 26 shown in FIG. go. In addition, by specifying the number of image files to be registered in the mark area 56, it can also function as a log file to interrupt the registration operation of document sheets when multiple document sheets are fed from the ADF 2. You can also do that.

Note that while the document sheets are being conveyed from the ADF 2, it is assumed that the document sheets are fed in duplicate and the OMR sheet 51 is processed in the photo mode, that is, the dither processing mode. sheet 5
Since the density is such that the OMR sheet mark 52 outputted in 1 can be distinguished as black, the OMR sheet mark 52
Immediately after detecting the
Command g.

Furthermore, in this embodiment, it is assumed that the density marked on the OMR sheet 51 is marked, for example, by writing "L" such as a marker pen, and the configuration is such that each mark can be detected even in the AE mode. The workstation unit 5 is configured to issue these instructions to perform AE mode reading, that is, an instruction to detect the black of each mark as a mark or default value.

On the other hand, in the case of the second method in which the OMR sheet 51 placed on the platen of the league section 1 is sent a bliscan command from the ADF 2 to detect each error, first, the control of the league interface section 21 is performed. A briscan command is sent from stage 12, and it is determined from the output of reading sensor 1b whether the sheet placed on platen 2 is a document sheet or OMR sheet 51, and it is determined that it is OMR sheet 51. The mark information memory 27 stores the addresses of marks to be read sequentially, such as the timing mark row 54.
Go and register.

Next, the optical scanning system waits for it to return to the reading home position, and when it returns, the scanning speed of the optical scanning system is increased to 2/3 times the normal magnification speed based on the mark address registered in the mark information memory 27. Slow down. From this point on,
Each mark is identified and read in accordance with the first method. Note that the data stored in the mark information memory 27 undergoes password processing under the control of the CPU 23, and is registered in the image registration section 5d together with the image information stored in the VRAM 28. Desired image data is read out from the image file registered in the registration section 5d and displayed on the bitmap display 5d.

In addition, if the reading sensor 1b determines that the sheet is a document sheet, the image on the document sheet is 16 mm/mrrr.
The data is stored in the VRAM 28, thinned out to 1/4 by a command from the CPU 23, and displayed on the bitmap display 5d.

Next, the OMR sheet reading control operation according to the present invention will be explained with reference to FIG.

FIG. 8 is a flowchart illustrating an example of the OMR sheet reading control r order according to the present invention.

Note that (1) to (18) indicate each step, and the order of each step is stored in the ROM 24 shown in FIG.

In the workstation section 5, the operator sets the reading mode (1). Next, the CPU 23 determines whether the set mode is the character mode plus prescan mode 2), and if YES, the sheet read by the reading sensor 1b is the OMR sheet 51.
Please judge whether or not 3), if NO? f step (17
) If YES, set the slice level of the image processing unit 1g to the AE level (4). Next, wait for the optical scanning system to finish scanning (5), and when the scanning is finished, return to step (1).

On the other hand, if the judgment in step (2) is No, it is judged whether the set mode is character mode plus slice level (8), and if YES, the sheet read by the reading sensor 1b is the OMR sheet 51. 7), if no, proceed to step (17) and Y.
For ES, set the slice level of image processing unit 1g to r32J
, r20J (8). Next, the reader interface unit 21 determines whether or not the scan has ended.
), if YES, return to step (1), if NO, O
The timing mark row 54 of the MR sheet 51 is identified by the identification means 1.
The control means 12 of the league interface section 2 sets the slice level of the image processing section 1g to "20" 11) and waits for the completion of a predetermined scan 12). When the predetermined scanning is completed, return to the balance (10).

On the other hand, if the judgment in step (6) is No, the CPU
Step 13) If YES, check whether the sheet read by the rough reading sensor 1b is the OMR sheet 51+4); If No, step 17) If the answer is YES, the control means 12 of the league interface section 21 sets the slice level of the image processing section 1g to "30".
15), then wait for the end of the scan 16), and when the predetermined scan is completed, return to step (1).

- If the judgment in step (13) is NO, CP
It is determined whether the mode set by U23 is the dither mode (17), and if YES, the reading mode is changed to the specified mode (18), and the process returns to step (15).

Next, the mark detection control operation according to the present invention will be explained with reference to FIG.

FIG. 9 is a flowchart illustrating an example of mark detection control operation according to the present invention. In addition.

(1) to (9) indicate each step.

Various sheets, ie, document sheets and OMR sheets 51, are input into the original tray 2d of the ADF 2 (1). Next, in response to an image reading command output from the workstation section 5, the sheet placed at the bottom of the document tray 2a is conveyed onto the platen of the reader section 1. In parallel, the light source 1a lights up and the image information on the sheet is guided to the reader interface section 21 via the reading sensor +b and the image processing section 1g, and whether or not it is an OMR sheet 51 is determined from the OMR sheet mark 52 (2)
, in the case of No, the read sheet is determined to be a document sheet, and the image information obtained by optical scanning is subjected to predetermined image processing in the image processing section 1g and stored in the image memory 26 shown in FIG.
(3), and the process returns to step (1).

On the other hand, if it is determined that it is the OMR sheet 51 in step (2), the OMR sheet 51 is determined from the OMR sheet mark 52 marked on the OMR sheet 51 (edited by the workstation section 5 and outputted by the printer section 3). Detects the amount of skew conveyance.

It is determined whether or not a preset allowable diagonal conveyance amount has been exceeded (4). If the identification means 11 determines that the preset allowable diagonal conveyance amount has been exceeded, an overbus The reading operation is stopped as e w), and the process returns to step (1) to input the next sheet.

On the other hand, if it is determined in step (4) that the amount is within the preset allowable skew conveyance amount, the detection address and creation amount data of the OMR sheet mark 52 are stored in the mark information memory 27 shown in FIG. After storing the frame in the frame, frame line removal processing is performed (5). Here, the frame line refers to the ruled line information that constitutes the mark area 56, password area 571, and character code mark area 58 on the OMR sheet 51. Since this ruled line information is the toner image output from the printer section 3, Part 1 is a process performed to avoid failure to drop out and the black level is determined, and frame processing is performed according to the procedure shown in FIG.

Note that details will be described later.

Next, mark detection such as the timing mark string 54 is executed 6), characters are extracted (7), the extracted characters are recognized 8), a detection code is outputted (8), and step ( Return to 1).

FIGS. 10(a) to 10(C) are diagrams for explaining the frame removing operation according to the present invention.

In FIG. 6A, 61 is image data (serial number), which is generated through binarization processing at a predetermined slice level in the image processing section 1g of the league section 1. 61a is OR data obtained by performing OR processing on the image data 61 in the main scanning direction. 61b is AND data obtained by performing AND processing on the OR data 61a.

In the same figure (b), 62a to 62d are image data,
63 is OR image data, which is obtained by ORing the image data 62a and the image data 62b in the sub-scanning direction.

Reference numeral 64 denotes OR image data, which is obtained by ORing the 1 image data 62c and the image data 62d in the sub-scanning direction.

65 is AND image data, which is 1 by AND processing (logical product) with OR image data 63 and OR image data 64.
1. T is received. DP is an isolated point, which is an isolated white image (indicated by "0" in the figure) in a continuous black image (indicated by rlJ in the figure).
This shows the case where .

In the same figure (C), 65a to 65i are image data, which constitute AND image data 65 as a whole. Reference numeral 66 indicates isolated point removal data, which is based on the change in the AND image data 65 shown in FIG.
That is, AND processing (indicated by AND in the diagram) is performed until rQJ changes to "1", OR processing (indicated by OR in the diagram) is performed until rlJ changes to "0", and rlJ changes to "0". When the AND image data 65 is subjected to the process of returning to the AND process after the change, isolated point removed data 66 from which isolated points are removed is obtained, as shown in FIG.

This allows isolated points and frame lines to be removed.

Image data 61 of 16 trees per millimeter shown in the same figure (a)
The data compression means 13 provided in the reader interface section 21 according to the present invention first performs OR processing to compress the data into 8 OR data 61a per millimeter. By this compression, isolated points of "0" (self-portrait data) in the black image data can be removed. As shown, the data pressure 1a is compressed into four AND data 61b per millimeter by performing AND processing by means 13. This compression allows the black image data in the white image data to be removed. These processes are performed for main scanning and sub-scanning.

Subsequently, as shown in FIG. 6(b), the image data 62
a, 62b and image data 62C.

62d, the isolated point removing means 14 of the present invention performs OR processing on each of them to obtain OR image data 63 and OR image data 64, and then further combines these OR image data 63 and OR image data 64. AND image data 65 is obtained by performing AND processing. However, the AND image data 65 also includes isolated points 65a, and the isolated points cannot be completely removed. Therefore, as shown in FIG. 6C, based on the change in the AND image data 65 shown in FIG. Perform AND processing (indicated by AND in the figure) until the value changes from ``1'' to ``1'', perform OR processing (indicated by OR in the figure) until it changes from ``1'' to ``0'', and change from rlJ to ``0''. When the process of returning to the AND process is performed on the AND image data 65, the same figure (C) is obtained.
As shown in Figure 66, the isolated point removal de- 66
is obtained. This makes it possible to remove solitary points in the image data, and mark areas 56 of the OMR sheet 51.
Only the mark information marked within the frame line information of the password area 579 character code mark area 58 can be accurately detected.

Next, the mark information detection control operation will be explained with reference to FIGS. 11(a) and 11(b).

FIGS. 11(a) and 11(b) show mahuna according to the present invention.
7 is a flowchart illustrating a tfFJ detection control operation. Note that (1) to (21) indicate each step.

First, the sheet conveyed from the ADF 2 is optically scanned, and
Among the OMR sheet marks 52, it is determined whether the OMR sheet mark 52 on the left side with respect to the sheet conveyance direction has been detected 1), and if No, it is determined whether the OMR sheet mark 52 on the right side has been detected 2) If it is determined NO, it is determined whether the sub-scanning count is 30 mm or less (3), and if YES, the sheet type read by the identification stage 11 is identified as the OMR sheet 51, and the image information is For example, serial image signals read at a resolution of 16 lines/rnm are stored in the image memory 264)
, if No, return to step (1).

On the other hand, if the determination in step (2) is YES, the reader interface unit 21 shown in FIG. 4 loads the right side OMR sheet mark detection address information into the mark information memory 27 (5). Next, the controller waits until the left OMR sheet mark 52 is detected (6), and when the left OMR sheet mark 52 is detected, the left OMR sheet mark detection address information is written into the mark information memory 27 (7). Next, the skew amount of the OMR sheet 51 is calculated from the left and right OMR sheet mark detection address values written in the mark information memory 27, and is written in the mark information memory 27 (8). Next, the reader interface section 21 calculates the mark addresses of the timing mark string 54 and the mark area 56 (9). Next, the identification means 11
It is determined whether or not the timing mark row 54 has been identified (10), and if NO, the process proceeds to step (13) and subsequent steps, and Y
If it is ES, calculate the address of mark area 5611
), and writes the address information into the memory area of the mark information memory 27 (12). Next, the optical scanning section scans the mark area 56 (13). Here, the reader interface unit 21 accesses the mark information memory 27 and determines whether the address information of the mark area 56 was set in step (12) (14), N
If YES, calculate the address of the next timing mark row 54 based on the skew amount data stored in the mark information memory (15), and if YES, calculate the address of the next timing mark row 54 based on the skew amount data and the address information of the mark area 56 (15). The address of the timing mark string 54 is calculated (1B). Next, the address of the mark area 56 is calculated based on the address information of the timing mark string 54 obtained in step (18) (17). Next, the contents stored in the mark information memory 27, that is, the address information of the timing mark row 54, are written in the area storing the address of the OMR sheet mark 52 on the OMR sheet 51 (18), and the process returns to step (10). .

- If the judgment in step (1) is YES, the detection address of the left OMR sheet mark 52 is stored in the mark information memory 27 (18), and then the right OMR sheet mark 52 is stored in the mark information memory 27.
Waiting until the sheet mark 52 is detected (20), and when the right OMR sheet mark 52 is detected, writing the detected address information into the mark information memory 27 (21);
Return to step (8).

Note that if the timing mark row 54 etc. on the OMR sheet 51 cannot be detected by optical scanning, the R-specific pattern 5
3 (created by the workstation section 5), each mark information is detected based on the address information read from the address information.

In the above embodiment, the image data on the OMR sheet 51 read by the reader unit 1 is compressed by performing a predetermined logical operation on the image data on the OMR sheet 51.
Although a case has been described in which the upper frame line information is removed, necessary image information can also be extracted by these logical operations.

〔Effect of the invention〕

As explained above, the present invention includes a first arithmetic processing means that performs a predetermined AND arithmetic operation on the main scanning and sub-scanning directions of image data compressed and output from the image reading means; A second method that alternately performs predetermined logical sum calculation processing and logical product calculation processing in the main scanning and sub-scanning directions of the image data based on the output change of the calculation data that has been subjected to the predetermined logical product calculation processing by the calculation processing means. Since the image reading means can remove white image data from black image data or black image data from white image data from the image data read by the image reading means, it is also possible to remove isolated points from compressed image data. This method has the advantage that only the desired character data marked within the frame line information output as an image on the optical mark reading sheet can be accurately read.

[Brief explanation of the drawing]

Fig. 1 is an external view illustrating the configuration of an electronic file device showing an embodiment of the present invention, Fig. 2 is a sectional view illustrating the configuration of the part shown in Fig. FIG. 3(b) is a sectional view of a laser beam printer showing an example of the printer section shown in FIG. 1, and FIG. 3(b) is a sectional view showing a case where the printer section shown in FIG. , FIG. 4 is a control block diagram explaining the control configuration of the electronic file system shown in FIG. 1, and FIG.
Control block diagram for controlling the printer section shown in the figure, No. 6
The figure is a schematic diagram explaining the OMR sheet format output from the printer section shown in Figure 1, Figure 7 is a diagram explaining an example of a character code according to the present invention, and Figure 8 is an OMR sheet reading control according to the present invention. 9 is a flowchart illustrating an example of the mark detection control operation according to the present invention, FIG. 10 is a diagram illustrating the frame removal operation according to the present invention, and FIGS. 11(a) and (b)
) is a flowchart explaining the mark information detection control operation according to the present invention. In the figure, 1 is the reader section, 2 is the ADF, 3 is the printer section, 4
5 is the paper feed section, and 5 is the workstation section. 11 is an identification means, 12 is a control means, 13 is a data compression means, 14 is an isolated point removal means, 21 is a reader interface section, 22 is a printer interface section, and 23 is a CPU
, 24 is a ROM, 26 is an image memory, and 27 is a mark information memory. Fig. 1 Fig. 2 Fig. 1:, 114 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 (a) 61b~, O+ i l T
O04 pieces/mm (b) Hiroλ I + + i + 1 1 -b'
P 65~01111 o 1 (C) 66- 〇〇〇111141 Figure 11 (a)

Claims (1)

[Claims] (1) It has an image reading means for reading a document sheet, and edits document management information for registering the image information of the document sheet read by the image reading means in an optical recording medium and outputs it as an optical mark reading sheet. In an electronic file system equipped with an image output means, a first arithmetic processing means that performs a predetermined AND operation process on the main scanning and sub-scanning directions of the image data compressed and output from the image reading means; Based on the output change of the arithmetic data that has been subjected to a predetermined AND operation process by the first arithmetic processing means, a predetermined OR operation process and an AND operation process are performed alternately in the main scanning and sub-scanning directions of the image data. 1. A mark information reading control device comprising: a second arithmetic processing means for performing the following operations.