JPS6336668A - Mark information read control device - Google Patents

Abstract

PURPOSE:To accurately read only the mark information marked in frame information by reading the frame line information while a picture reading eliminating it. CONSTITUTION:A data compression means 13 being a 1st operation processing means applies a prescribed OR operation to the main and sub scanning directions of a picture data read by a reader section 1. After the end of the OR operation, an isolation point eliminating means 14 being a 2nd operation processing means applies a prescribed AND operation in the main and sub scanning directions of the operation data processed by the compression means 13 to compress the picture data. Thus, a white picture data in a black picture data or a black picture data in a white picture data is eliminated from the picture data read by the picture read means and only the mark information marked in the frame line information 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 a document or image, can be read out at any time by inputting the readout information (keyword) added at the time of registration. .

In this case, the information to be registered (sheet-like or book-like) is optically read by an image league (optical scanner) and binarized, and then the operator inputs keywords from an input means such as a keyboard. Create a type for each information to be registered and a keyword file for the document file to be registered in advance, read the document file from the image reader, and when the reading is completed, the operator can read the keyword file and document file described above. There was a type that worked to link the relationship with.

[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 in 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 and document files are input at the same time using a reading device such as an optical mark league or an optical card league, but this requires paper with a special format printed on it, and requires a reading device and a special paper. Therefore, new problems arise, such as a significant increase in total cost.

The present invention has been made to solve the above problems, and the present invention allows an image reading means to read while removing frame line information that serves as a guide for inputting marks on an optical mark reading sheet format that is output as an image. It is an object of the present invention to provide a mark information reading control device that can accurately read only mark information marked within frame line 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 OR operation process on the main scanning and sub-scanning directions of image data output from the image reading means; A second arithmetic processing means is provided which performs a logical AND arithmetic process in the main scanning and sub-scanning directions of the arithmetic data that has been subjected to a predetermined OR arithmetic process by the arithmetic processing means.

[Effect]

In this invention, the first arithmetic processing means performs a predetermined logical sum operation in the main scanning and sub-scanning directions of the image data read by the image reading means, and after the completion of this logical sum calculation process, the second calculation The processing means compresses the image data by performing a predetermined logical product operation on the arithmetic data processed by the first arithmetic processing means in the main scanning and sub-scanning directions.

〔Example〕

FIG. 1 is an outside H diagram illustrating the configuration of an electronic filing device showing an embodiment of the present invention, in which a beam 1 is used to convey a document sheet conveyed by an automatic document feeder (ADF) 2, or a document sheet as described later. An identification means 11 (described later) that optically reads the optical mark reading sheet and identifies both sheets, and the scanning speed of the optical scanning unit (described later) or automatic document transport is determined based on the identification information output from the 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° control means 12 is provided in the league interface section 21, and this control means 12 also serves as the reading control means and mark position calculation means of the present invention.

Reference numeral 3 denotes a printer unit serving as an image output means of the present invention, which is composed of, for example, a laser beam printer.

4 is the paper feed section, which feeds the sheet-like recording medium into the printer's interior.
Il! j Output to image forming section. 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. The control unit that comprehensively controls the League Division 1 (
CPU).

FIG. 2 is a sectional view illustrating the configuration of the league portion 1 shown in FIG. 1, and the same parts as in FIG. 1 are given the same reference numerals.

In this figure, reference numeral 1a denotes a light source that irradiates light onto a document sheet or an optical mark reading sheet (hereinafter referred to as an OMR sheet) that is automatically conveyed by an ADF 2 to an original platen on a reader section 1. A reading sensor 1b receives reflected light from the light source 1a. lc and Id are scanning mirrors, and the reflected light is passed through an optical lens 1e to e.g. CO
Optical information is imaged on an image sensor (line sensor) 1f constituted by D. , 1g is an image processing section, and line sensor 1
Predetermined processing is performed on the image signal based on the image information output from F, for example, halftone processing (dither processing).

Binarization processing is performed based on the slice level, which will be described later, and the +i'i
+h is transferred to the workstation unit 5.

Reference numeral 2a denotes a document tray, on which document sheets (indicated by broken lines) and OMR sheets (indicated by solid lines) are 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.
Reads the sheet formed on the platen h.

FIG. 3(a) is a 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. 1 are given the same reference numerals.

In this figure, 3a is a laser unit that modulates the semiconductor laser on/off based on image information sent from the printer interface unit 22. 3b is a scanning mirror, which is a polygon mirror (laser beam) provided on 3a.
(t2) A laser beam LB deflected by a laser beam LB (not shown) is irradiated onto the photosensitive drum 3c by IK to form an electrostatic latent image (t2). 3
d is a developing device.

The electrostatic latent image formed on the photosensitive drum 3C is developed with a developer (toner) and visualized. Reference numeral 3e denotes a transfer charger that transfers a toner image onto the recording paper fed from the paper feed section 4. 3
f is a conveyor belt that conveys the recording paper on which transfer has been completed in the direction of the dotted arrow. A fixing roller 3g fixes the toner image transferred to the recording paper onto the recording paper and discharges the paper to a paper discharge 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 of the recording paper, and detects the skewed state at the printer interface section. 22
Transfer to. As a result, the printer interface unit 22
The address of the image information is normalized so that the image information to be transferred is printed vertically and horizontally parallel to the recording paper that is conveyed in color. 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 provide both the line sensor 3i and the skew conveyance detector 3h; by providing either one of them, the editing information created by the workstation section 5 or the image information read by the printer section 1 can be The information can be output accurately onto the conveyed recording paper, and the 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 section 3 shown in FIG. are given the same reference numerals. 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 configuration of the electronic file system shown in FIG. 1, and the same reference numerals as in FIGS. 1 and 2 are given the same reference numerals.

In this figure, 23 is, for example, a 680 manufactured by Motorola.
00 (32-bit) CPU controls each section based on a control program stored in the ROM 24. In addition,
The CPU 23 is a UN resident in a specific area of the ROM 24.
Each part is controlled by an operating system L (O5) manufactured by IX, for example, SYS TEMV. 2
5 is a pass line, and the workstation section 5. Printer section 3. It communicates information with the reader section 1. 26 is an image memory for storing document sheet 2 read from the reader section 1;
Store value image information. A mark information memory 27 stores address information of various timing marks printed on an OMR sheet, which will be described later. 28 is video ram (VRAM)
), 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 transfers operating inputs from the keyboard 5b and pointing device 5C to the CPU 23 via the pass line 25. Reference numeral 30 denotes an optical disk interface section for reading information written on the optical disk stored in the image registration section 5a or for reading the information from the image memory 26.
Write compressed data of binary image information stored in C
Control is performed based on control commands transferred from the PU 23 via the pass line 25. 31 is the ADF controller,
The conveyance and conveyance speed of the document sheet or OMR sheet conveyed from the ADF 2 are controlled.

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 that sends a control signal to the CPU 41 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. do. 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 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 reader 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 leader section 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, and by marking each area with a writing instrument, the reader section 1 can read alphanumeric characters as shown in the 0'N7 diagram as vector information.

Bitmap display 5 of workstation section 5
For example, an OMR sheet 51 (7) created using the keyboard 5b, pointing device 5C, etc. while looking at
File name; Library) c7) 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
A drive command for feeding the cut sheet 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 row 542
Character code string 55. 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 579 and character code mark area 58 are printed. When this normalization is completed and the latent image position and image on the cut sheet are set at the timing, conveyance of the cut sheet, which had been temporarily stopped, is started, and the machining/○ controller 44 is started. The semiconductor laser housed in the laser unit 3a is modulated on/off based on the dot data read from the image memory 42, and a static image is applied to the photosensitive drum 3c shown in FIG. 3(a).
° Forms a latent image. This PP'r image is developed by a known electrophotographic process, and is transferred onto the cut sheet by a transfer unit 12. Next, the toner image transferred onto the cut sheet (each OMR sheet mark 52
．． Identification pattern 53° timing mark string 542 character code string 55. Mark area 56. Password area 57
The one-character code mark area 58) is the line sensor 31
It is converted into an electrical signal and transferred to the I10 controller 44, and it is checked (verify check) whether it matches the image information stored in the image memory 42, and if the two signals are significantly different, the I10 controller 44 sends it to the CFU 41. The image transfer from the image memory 42 is re-commanded.

As a result, the reading sensor 1b of the reader section 1 (shown in FIG.
The timing mark string 54 of the timing mark array 54 can be read accurately, 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 conformance check command is input using the pointing device 50, etc., the reader interface ? A21
It is possible to check whether the timing mark string 54 read by the reading sensor 1b is affected by other noise-like IEs and becomes difficult to read.
The fatigue and conformity state of the OMR sheet 51 is checked, and each OMR sheet mark 52. on the OMR sheet 51 is checked by this check. Identification pattern 53. Timing mark row 54
2-character code string 55. If it is determined that there will be a problem in reading the mark area 56, password area 571, and character code mark area 58, a warning will be displayed on the bitmap 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 from the keyboard 5b of the workstation unit 5, the registration format can be used to create a one-to-one match with the keyword in the list. Check the correspondence relationship of keyword registration letter 7
．． 1 can be determined accurately.

Furthermore, when the OMR sheet 51 is conveyed from the ADF 2 or when the OMR sheet 51 is conveyed, the OMR sheet marks 52 of OMR sheet) 51 and h are 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 sheet 51 by the reader section 1 shown in FIG.
The read control operation will be explained.

In this embodiment, the OMR sheet 51 is configured to be read in two different ways.

The first method is to turn on the light source 1a and read the reflected light 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. The image processing unit 1g detects the image, changes the conveying speed of the OMR sheet 51 based on the detection output, converts the marked image information into an electrical signal with the image sensor 1f, and converts the marked image information into an electrical signal.
Output to. Thereby, the efficiency of OMR sheet reading and document sheet reading processing can be improved.

The second method is to transport the OMR sheet 51 from the ADF 2 shown in FIG.
, by scanning the reading sensor 1b, O
The MR sheet 51 and the document sheet are identified, the detected addresses of each mark are registered in the mark information memory 27 shown in FIG. 4, and the addresses are stored in the mark information memory 27 during the second scan. By varying the scanning speed of the optical scanning system based on the mark address, the OMR sheet 51
The above mark information 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 and output to the image 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 reader unit 1 to move the optical scanning system to a predetermined position and stop it, and to turn on the light source 1d. Therefore, when the sheets being conveyed one after another pass through the reading sensor 1b, the image information is converted into an electrical signal by the image sensor 1f and output to the league interface section 21, and the identification means 11 determines that the conveyed sheet is a document sheet. It is identified whether there is an OMR sheet 51, and OMR sheet 51 is identified.
When it is determined that the MR sheet 51 is the OMR sheet 51, the control means 12 causes the ADF controller 31 of the reader 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, the league interface section 21 sends the image processing section 1g shown in FIG. 2 a slice level for binarizing the electrical signal output from the image sensor 1f in character mode, that is, 64 gradations. Set to "32", which corresponds to the l/272 gradation. 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 further detected, the league interface unit 21 issues a command to change the slice level for binarization to “20” to the image processing unit. Output to 1g. This is because the density marked in the mark area 55 of the OMR sheet 57 is often marked with a writing instrument such as a pencil. The mark information on the OMR sheet 51 is thus read by dynamically varying the slice level, and information necessary for reading the document sheet is notified to the league interface section 21.

This makes it possible to determine whether the next document sheet conveyed from the ADF 2 is an image or character data, and if it is image data, the dithered image information is stored in the image memory 26 shown in FIG. go. Note that 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 one document sheet when multiple document sheets are fed from the ADF 2. You can also do it.

In this embodiment, even in the dither processing mode, assuming that the document sheets are fed multiple times while the document sheet a is being fed from the ADF 2 and the OMR sheet 51 is processed in the photo mode, that is, the dither processing mode, OMR 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 this, the control means 12 of the league interface section 21 issues a command to switch to the character mode to the image processing section 1.
Command g.

Further, in this embodiment, it is assumed that the densities marked on the OMR sheet 51 are marked, for example, with a writing instrument 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 standard default value.

-, OMR from ADF2 to the platen of reader section 1
In the second method of detecting each mark by issuing a pre-scan command to the sheet 51 placed thereon, first, the control means 12 of the league interface unit 21 sends out a pre-scan command to scan the platen. It is determined from the output of the reading sensor 1b whether the placed sheet is a document sheet or an OMR sheet 51, and if it is determined that it is an OMR sheet 51, the addresses of marks to be read sequentially, such as the timing mark row 54, etc. are determined. Mark information memory 2
Register for 7 and go.

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 5a 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 5a and displayed on the bitmap display 5d.

Also, the reading sensor 1b scans the sheet with a sentence r! : When judged as a sheet, the image of document sheet +-i2 is 16 trees/
The data is stored as lllff1, thinned out to 1/4 by a command from the CPU 23, stored in the VRAM 28, and displayed on the bitmap display 5d.

Next, the control operation for reading the MR sheet from IyJ will be explained with reference to FIG.

FIG. 8 is a flowchart illustrating an example of the OMR sheet 1 reading control procedure according to the present invention.

Note that (1) to (1st day) indicate each step, and each of these procedures 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).

If YES, further determine whether the sheet read by the reading sensor 1b is the OMR sheet 513), N
OsuJ” + bastab (17)i,: proceed, YES
If so, the slice level of the image processing section 1g is set to the AE level (4). Next, wait for the scan operation of the optical scanning system (5), and when the scan operation is completed, proceed to step (5).
Return to 1).

On the other hand, if the determination in step (2) is No, it is determined whether the set mode is character mode plus slice level (8), and if YES, the sheet read by the iW pickup sensor 1b is the OMR sheet. 51 or not 7), if No, proceed to step (17), and if YES, change the slice level of the image processing unit 1g to "
32” and “2o” (8). Next, the reader interface section 21 determines whether the scanning is completed (9), and if YES, the process returns to step (1), and if NO, it waits for the identification means 11 to detect the timing mark row 54 on the OMR sheet 51. lO), upon detection, the control means 12 of the reader interface section 21 controls the image processing section 1.
Set the slice level of g to "20" 11), wait for the end of a predetermined scan r 12), and return to step (10) when the predetermined scan length reaches r.

On the other hand, if the judgment in step (6) is No, the CPU
If the mode set in Step 23 is the character mode, check #0MI (13). If YES, it is further determined whether the sheet read by the reading sensor 1b is the OMR sheet 51 (Step 14); if No, step (17) ), and if YES, the control means 12 of the reader interface section 21 sets the slice level of the image processing section 1g to "3o".
15) 1. Next, wait for the end of the scan. 16) When the predetermined scan is finished, return to step (1).

On the other hand, if the judgment in step (13) is No, the CPU
It is determined whether the mode set in step 23 is the dither mode (17), and if YES, the reading mode is cut to the designated 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/I# control operation according to the present invention. In addition, (1) ~
(9) shows each step.

Various sheets, ie, document sheets and OMR sheets 51, are input into the original tray 2a of the ADF 2 (1). Next, based on an image reading command output from the workstation section 5, the sheets placed at the bottom of the document tray 2a are conveyed onto the platen of the reader section 1. In parallel with this, the light source 1a is turned on and the image information on the sheet is read and guided to the reader interface section 21 via the sensor lb and the image processing section 1g, and whether or not it is an OMR sheet 51 is determined from the OMR sheet mark 52. It was determined (2
), in the case of NO, the reading 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 2 shown in FIG.
6 (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). 4
The line conveyance amount is detected and it is determined whether the line conveyance amount exceeds a preset allowable skew conveyance amount (4). With this identification,
If the identification means 11 determines that the permissible skew conveyance amount set in advance has been exceeded, an overskew
ke), the reading operation is stopped, 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 sliding conveyance amount, the detected address and skew amount data of the OMR sheet mark 52 are stored in the mark information memory 27 shown in FIG. After that, frame line removal processing is performed (5). Here, the frame line is ruled line information that constitutes the mark area 56, password area 579, character code mark area 58 on the OMR sheet 51, and since this ruled line information is the toner image output from the printer section 3,
The league section 1 performs frame processing in accordance with the procedure shown in FIG. 1O, which is a process performed to avoid failure to drop out and the black level is determined.

Note that details will be described later.

Next, marks such as the timing mark string 54 are detected (6), and characters are cut out (7). Subsequently, the extracted characters are recognized (8), a detection code is outputted (9), and the process returns to step (1).

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

In FIG. 4A, 61 is image data (serial signal), 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.

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

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

In the same figure (C), 65a to 65i are image data, which constitute AND image data 65 as a whole. Reference numeral 66 denotes isolated point removal data, which is based on the change in the AND image data 65 shown in FIG.
That is, AND processing (shown by Ltl A N D in the figure) is performed until the change from "0" to rlJ, and from rlJ to "
OR processing (indicated by OR in the figure) is performed until the value changes to 0.

When the AND image data 65 is subjected to a process of changing from rlJ to "0" and then returning to the AND process, 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 unit 21 according to the present invention performs a multiple OR process to compress the OR data 61a into 8 trees per millimeter. By this compression, isolated points of "0" (white image data) in black image data can be removed. Furthermore, AND processing is performed using 7 stages of data compression 13, resulting in 4 AND data 6 per unit millimeter.
Compress to 1b. 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
The isolated point removing means 14 of the present invention performs OR processing on each of the image data 62C and 62C962d, and the OR image data 63 and the OR image data 6 are
After obtaining 4, AND processing is performed on these AND data 63 and OR image data 64 to obtain AND image data 65. However, the AND image data 65 also includes isolated points 65a, and the isolated points cannot be completely removed. Therefore, as shown in FIG.
), that is, AND processing (indicated by AND in the figure) is performed until it changes from "0" to "1", and OR processing is performed until it changes from "1" to "0". Processing (indicated by OR in the figure) is performed to change from "1" to "
When the AND image data 65 is subjected to the process of returning to the AND process after changing to "0", isolated point removed data 66 from which isolated points have been removed is obtained, as shown in FIG. As a result, isolated points in the image data can be removed, and O
Mark area 56 of MR sheet 51. Only the mark information marked within the frame line information of the password area 571 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) are flowcharts 1 for explaining the mark information detection control operation according to the invention. 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 30111ffl or less (3), and if it is YES, the sheet type read by the identification means 11 is identified as the OMR sheet 51, and the image information is For example, the serial image signal read at a resolution of 16 mm/mm is stored in the image memory 26 (4), and if No, the process returns to step (1).

On the other hand, if the determination in step (2) is YES, the reader interface section 21 shown in FIG. 4 stores the right ○ MR 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 of the OMR sheet 51 is calculated from the left and right OMR sheet mark detection address values stored in the mark information memory 27, and the skew of the OMR sheet 51 is calculated.
(8). Next, the reader interface section 21 calculates the mark addresses of the timing mark string 54 and the mark area 56 (9). Next, identification means 1
1 determines whether the timing mark row 54 has been identified (10), and if NO, proceeds to step (13) onwards;
If YES, calculate the address of mark area 561
1), the address information is written in 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 section 21 accesses the mark information memory 27 and determines whether or not the address information of the mark area 56 was set in step (12) (14).
If NO, the address of the next timing mark row 54 is calculated based on the skew amount data stored in the mark information memory (15), and if YES, the skew amount data and the address information of the mark area 56 are calculated (15). Then, the address of the next timing mark string 54 is calculated (16).Then, the address of the mark area 56 is calculated based on the address information of the timing mark string 54 obtained in step (16) (17). Next, the content written in the mark information memory 27, that is, the address information of the timing mark row 54, is written in the area where the address of the OMR sheet mark 52 is stored on the OMR sheet 51 (18).
Return 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 (19), 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 identification pattern 5
3 (created by the workstation section 5), each mark information is detected based on the address information read from the address information.

〔Effect of the invention〕

As explained above, the present invention includes a first arithmetic processing means that performs a predetermined logical OR operation on image data outputted from an image reading means in the main scanning and sub-scanning directions; A second arithmetic processing means is provided which performs a predetermined AND arithmetic process in the main scanning and sub-scanning directions of the arithmetic data that has been subjected to a predetermined OR arithmetic process by the processing stage, so that the image read by the image reading means The white image data in the black image data or the black image data in the white image data can be removed from the data, and the frame line information output as an image on the optical mark reading sheet and the characters marked within the frame line information can be recognized. Right with excellent benefits.

[Brief explanation of drawings]

FIG. 1 is an external view illustrating the configuration of an electronic file system showing an embodiment of the present invention, FIG. 2 is a sectional view illustrating the configuration of the reader section shown in FIG. 1, and FIG. 3(a) 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. 1 is configured with a four-drum color laser beam printer. 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
1 is a paper feeding unit, 5 is a workstation unit, 11 is an identification unit, 12 is a control unit, 13 is a data compression unit, 14 is an isolated point removal unit, 21 is a reader interface unit, 22 is a printer interface unit, 23 is a CPU, 24 is ROM
, 26 is an image memory, and 27 is a mark information memory. Fig. 1 5 Wax station section Fig. 2 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 (a) (Image data) (b) 62a~, 0 1 111 0 0 0R Fake 62b~
o I T I I O+ -b'62c
~ 11111110R friend 52a\ 0 1 1 0 1 + + -b'
6:3z,,Q + + + I O+ A
NDMrieA\+ l T l + 111,. 1DP 65~ O1+1iOI (C) Figure 11 (a) Figure 11 (b)

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 comprising an image output means, a first arithmetic processing means performs a predetermined OR operation process on the main scanning and sub-scanning directions of image data output from the image reading means; and a second arithmetic processing means that performs a predetermined AND arithmetic process in the main scanning and sub-scanning directions of the arithmetic data that has been subjected to a predetermined OR arithmetic process by the arithmetic processing means. Read control unit.