JPS6336664A - Wark information detector - Google Patents

Abstract

PURPOSE:To accurately detect mark information on an optical mark read sheet by providing a means identifying an optical mark read sheet and a document sheet and a means identifying the meandering quantity of the optical mark read sheet. CONSTITUTION:A control means 12 provided to a reader interface section 21 identifies whether a sheet carried to a reader section 1 is an optical mark read sheet or a document sheet. Further, a detector 3h provided to a printer detects the meandering quantity of recording paper carried from a paper supply section 4 to identify the meandering quantity of the optical mark read sheet. Thus, the mark information on the optical mark read sheet is detected accurately.

Description

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

[Conventional technology]

Conventionally, in this type of electronic filing system,
By registering information such as:,:, on a recording medium such as an optical disk and inputting the readout information (keyword) added at the time of registration, the recorded information, for example, a sentence,! 2 or images can be read out at any time.

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 keywords using 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 Image League, and when the reading is completed, the operator can read the keyword file and document file mentioned 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 are input using a reading device such as an optical mark league or an optical card reader, and a document file is input at the same time, but a paper sheet with a special format printed on it has been proposed. 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 in order to solve the above-mentioned problems, and an image reading means identifies a word sheet and an optical mark reading sheet, and based on this identification result, the reading mode of the optical scanning system is changed to character mode. It is an object of the present invention to provide a mark information detection device that can accurately detect mark information on an optical mark reading sheet by automatically setting.

[Means for solving problems]

In the mark information detection device according to the present invention, the image reading means is provided with an identification means for identifying an optical mark reading sheet and a document sheet outputted from the image output means, and for identifying the skew amount of the optical mark reading sheet. It is something.

[Effect]

In this invention, the identification means identifies the sheet type read by the image reading means and also identifies the amount of skew of the optical mark reading sheet.

〔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. Identification means for optically reading the mark reading sheet and identifying both sheets] 1 (described later) and the scanning speed of the optical scanning unit (described later) or automatic document transport 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
, data compression means 13 of this invention. Isolated point removal means 14
etc. Note that the identification means 11 and control means 12, which also serve as detection means of the present invention, are provided in a league interface section 21, which will be described later. Further, the 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.

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, which includes an image registration unit 5a in which an optical recording medium constituted by an optical disk is stored, a keyboard 5b for inputting operation commands, a pointing device 5c, and a reader unit 1 to read data. It is comprised of a bitmap display 5d that displays document images as raster images, etc., and is connected to the printer section 3 and reader section 1 through a communication line 6.7. Note that the workstation section 5 includes each section 58 to 5d and the printer section 3.
．． On the right is the control unit (CPU) that generally controls the League Division 1 and other divisions.

FIG. 2 is a sectional view illustrating the structure of the reader section 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. Reference numeral 1b denotes a reading sensor that receives reflected light from the light source ]d. 1c and 1d are scanning mirrors, and the reflected light is sent to a CCD, for example, through an optical lens 1e.
Optical information is imaged on an image sensor (line sensor) If composed of a. 1g is an image processing unit that performs predetermined processing on the image signal based on the image information output from the line sensor 1f;
For example, 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 league interface section 21.

Reference numeral 2a denotes a document tray, on which document sheets (indicated by broken lines) and OMR sheets (indicated by solid lines) are planted, and are automatically conveyed in order from sorting on the bottom surface.

Note that the ADF 2 automatically transports the sheet to the original table and optically scans the sheet, which is then transferred to the Fj Dr. paper. Further, the reading sensor 1b and the light 1lj1a constitute an optical scanning section, and this optical scanning section moves in the direction of the arrow to read the sheet 1[delta] placed on the platen I-.

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 (
The photosensitive drum 3c is irradiated with a laser beam LB deflected by a laser beam (not shown) to form an electrostatic latent image. 3d is a developing device that converts the electrostatic latent image formed on the photosensitive drum 3C into a developer (
toner) to visualize it. 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 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 h'7 information transferred to the image information is printed parallel to the vertical and horizontal directions on the recording paper that is conveyed obliquely. A line sensor 3I 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. In addition, line sensor 311 crime conveyance detector 3
It is not necessary to provide both h, but 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 accurately output to the recording paper being conveyed, and the reader The reading sensor 1b provided in the unit 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. A code is attached. Note that this color laser beam printer can print 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 structure of the multiplex file system shown in FIG. 1, and the same parts 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 the control programmer 1, Ni, and Tanibe stored in the ROM 24.

Note that the CPU 23 uses a UNIX operating system (O8) that resides in a specific area of the ROM 24.
For example, each part is controlled by SYSTEMV. 25 is a pass line, which connects the workstation section 5. Printer section 3. Communicate information with League Division 7. An image memory 26 stores binary image information of a document sheet read from the reader 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 yE times signal output from the skew conveyance detector 3h. is sent to the CPU 41. It also determines whether the read image output from the line sensor 31 matches the image information stored in the image memory 42, and if the two signals are significantly different, the image information stored in the image memory 42 is reproduced. Instructs the CPU 41 to output the image, and also sends the paper feed conveyance system 45
and sends a drive command to 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 ○MR sheet, 52 is the OMR sheet mark, and this O
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,
Conveyance speed or reader section 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 unit 1 can read alphanumeric characters as shown in FIG. 7 as vector information.

Bitmap display 5 of workstation section 5
While looking at d, image information (vector information) of 1 (for example, OMR sea) 51 (7 file name: Library) created with keyboard 5b, pointing device 50, etc.
is converted into rask image information via the printer interface section 22 and stored in the image memory 42 of the printer section 3.
, the CPU 41 sends a drive command to the paper feed conveyance system 45 to feed the cut sheet stored in the paper feed section 4 . In response to this, the paper feed roller 4a is driven,
The paper is fed in the direction of the dotted arrow shown in FIG. 3(a),
The skew conveyance detector 3h transfers the skew conveyance state information of the cut sheet to the I/O controller 44 shown in FIG. Naru OMR sheet mark 52
．． Identification pattern 53. Timing mark string 542 Character code string 55. Mark area 56. Password area 57
The storage address of the image memory 42 (shown in FIG. 5) storing the dot data of these marks and patterns is normalized so that the one-character code mark area 58 is printed. When this New Year's conversion is completed and the latent image position and image writing timing on the cut sheet are determined, conveyance of the cut sheet, which had been temporarily stopped, is started, and the I10 controller 44 transfers data from the image memory 42. The semiconductor laser housed in the laser unit 3a is modulated on/off based on the read dot data to form 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 the cut sheet by a transfer charger 3e. Next, the toner image transferred onto the cut sheet (each ○MR sheet mark 52, identification pattern 53°, timing mark string 541, character code string 55, mark area 56, password area 572, character code mark area 58) is transferred to the line sensor 31. The image information is converted into an electrical signal and 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 sends the image information to the CPU 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.
1 timing mark row 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 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.
4 is affected by other noise conditions, making it difficult to read.
The fatigue and compliance status 7E of the R 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 541
Character code string 55. If it is determined that there will be a problem in reading the mark area 56, password area 577, character code mark area 58, the workstation section 5
Then, a warning is displayed on the second display 5d.

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 section 5, it is possible to make a one-to-one correspondence with the keyword in the registered format. You can check the relationship and accurately determine the registration status of the keyword.

In addition, the OMR sea [・OMR sea at the time when 51 is transported from the ADF2 or at the time of transport] 51,
The sheet mark 52 is detected to detect the amount of skew of the ○MR sheet 51, and the reading of the ○MR sheet 51 and one reading operation of the document sheet are controlled.

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, it is possible to improve the efficiency of OMR sheet reading and Bunzuki sheet reading processing.

The second method is to transport the MR receipt 1 from the ADF 2 shown in FIG. By pre-scanning the 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 unit 1 to move the optical scanning system to a predetermined position and stop it, and to turn on the light source 1a. Therefore, when sheets conveyed in sequence pass over the reading sensor 1b, the image information thereof is converted into an electrical signal by the image sensor 1f, and output to the league interface section 21, and the sheets conveyed by the identification means 11 are recognized as document sheets. or OMR sheet 51 is identified, and OMR sheet 51 is identified.
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, 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 1/2 gradation of . In this state, the 0MR 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 51 is often marked with a writing instrument such as a pencil. In this way, the mark information on the OMR sheet 51 is read by dynamically varying the slice level, and information necessary for reading the document sheet is notified to the league interface unit 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 document sheets when multiple document sheets are fed from the ADF 2. You can also do it.

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 this, the control means 12 of the reader interface section 21 issues a command to switch to the character mode.
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.

On the other hand, when using the second method of detecting each mark by pre-scanning the OMR sheet 51 placed on the platen of the league section 1 from the ADF 2, first, the control means 12 of the league interface section 2 A pre-scan command is sent, and it is determined from the output of the reading sensor 1b whether the sheet placed on the platen is a document sheet or an OMR sheet 51, and if it is determined that it is an OMR sheet 51, it is read sequentially. The addresses of marks, such as the timing mark row 54, are registered in the mark information memory 27.

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,
Starting from the first method, each mark is identified and read. 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.

If the reading sensor 1b determines that the sheet is a document sheet, the image on the document sheet is stored at 16 lines/mm, 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 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 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), and if YES, the sheet read by the reading sensor 7b is the OMR sheet 51.
3), NOA” Ruba Sftsub (17
)4. : Proceed, YESA: Rach 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 return to step (1) once the scan has been completed.

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 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 r32.
, r20'' (8). Next, the reader interface unit 21 determines whether or not the scan has ended.9)
, if YES, return to step (1); if NO, OM
The timing mark row 54 of the R sheet 51 is identified by the identification means 11.
10), and when detected, the control means 12 of the image processing unit 7g sets the slice level of the image processing unit 7g to "20" 11), and waits for the completion of a predetermined scan 12), When the predetermined scanning is completed, return to step (10).

On the other hand, if the judgment in step (6) is NO, the CPU
If YES, it is further determined whether the sheet read by the reading sensor 1b is the OMR sheet 51 (14); if NO, step (17) and subsequent steps are performed. If the answer is YES, the control means 12 of the league interface unit 21 sets the slice level of the image processing unit 1g to only "30" (15), and then waits for the end of the scan (16), and the predetermined scan is completed. Then 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 1 reading mode is switched to the specified mode (1 day) 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. Note that (1) to (9) indicate 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 sheet placed at the bottom of the document tray 2a is 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 2 via the reading sensor lb and the image processing section 1g. It is determined from (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). The amount of skew conveyance is detected, and it is determined whether or not the amount of skew conveyance exceeds a preset allowable amount of skew conveyance (4). With this identification,
If the identification means 11 determines that a preset allowable skew conveyance amount has been exceeded, an overskew
ke w), 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 skew conveyance amount, the detection address and skew amount data of the OMR sheet mark 52 are stored in the mark information memory 27 shown in FIG. After storing, frame line removal processing is performed (5). Here, the frame line is ruled line information that constitutes the mark area 56, password area 572, and 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 reader unit 1 performs frame processing in accordance with the procedure shown in FIG. 7510, which is a process performed to avoid failure to drop out and judge the black level.

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 cut out characters are recognized (8), a detection code is outputted (8), 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 the same figure (a), 61 is image data (serial signal), which is generated by converting the image data 61 into 1 at a predetermined slice level in the image processing unit 1g of the reader unit 1. This is OR data that has been OR-processed in the main scanning direction. 61b is AND data that has been AND-processed 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 typesetting) 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 a case where an isolated white image (indicated by rQJ in the figure) exists in the area (indicated by rQJ 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 indicates isolated point removal data, which is based on the change in the AND image data 65 shown in FIG.
In other words, AND processing 8 until it changes from "0" to "1"
! (shown by AND in the figure), perform OR processing (shown by OR in the figure) until the value changes from "1" to "0", and rlJ
When the AND image data 65 is subjected to the process of changing from to rQJ 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 with unit millimeters shown in FIG.
The data compression means 13 provided in the league interface unit 21 according to the present invention first performs OR processing and compresses the OR data 61a into 8 OR data per millimeter. By this compression, isolated points of "0" (white image data) in black image data can be removed. Furthermore, AND processing is performed by the data compression means 13 to obtain 4 trees of AND data 6 per 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 1N(b), image data 6
2a, 62b and image data 62C962d, 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 processing with OR image data 64 is performed 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.
For the image data 65a to 65i constituting
Based on the change in the AND image data 65 shown in b), that is, AND processing (
(indicated by AND in the figure), performs OR processing (indicated by OR in the figure) until it changes from "1" to "0", and returns to AND processing after it changes from "1" to "0". When performed on the image data 65, as shown in FIG.
Isolated point removed data 66 is obtained by removing isolated points. This makes it possible to remove isolated points in the image data.
Mark area 56 of OMR 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 illustrating the mark information detection control operation according to the present invention. In addition,(
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 necessary to judge 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 necessary to judge 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 3On+m or less (3), and if YES, the sheet type read by the identification means 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/■ may be 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 league interface section 21 shown in FIG. 4 reads the OMR sheet mark detection address information on the right side 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 oblique portion 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 written in the mark information memory 27 (8). Next, the league interface unit 21 calculates the mark addresses of the timing mark row 54 and the mark area 56 (9). Next, identification means 1]
It is judged whether or not the timing mark row 54 has been identified (10). If NO, proceed to step (13) and thereafter, 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 league interface unit 21 accesses the mark information memory 27 and determines whether the addresser l11'+u of the mark area 56 has been sent in step (12) (14), and if No, it is stored in the mark information memory. Calculate the address of the next timing mark row 54 based on the skew 1'i''L data = (15), 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. Calculate 54 addresses (
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 (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 storing the address of the OMR sheet mark 52 on the OMR sheet 51 (18), and the process goes to step (10). return.

On the other hand, if the determination 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 detection of the right OMR sheet mark 52 is waited. 20) When the right OMR sheet mark 52 is detected, the detected address information is written in the mark information memory 27 (21), and the process returns to step (8).

Note that if the timing mark row 54 etc. on the ○MR 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 is provided with identification means for identifying the optical mark reading sheet and the document sheet outputted from the image output means as well as for identifying the skew amount of the optical mark reading sheet. It is possible to accurately identify the OMR sheet and read the mark information marked on the OMR sheet, and it is possible to automate the document sheet registration operation that conventionally required operations from the user. It has the advantage of being able to efficiently record and manage records.

[Brief explanation of drawings]

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 reader section shown in FIG. 1, and 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
1 is a paper feeding section, 5 is a workstation section, 1] is an identification means, 12 is a control means, 21 is a reader interface section, 2
2 is a printer interface section, 23 is a CPU, 24 is a ROM, 26 is an image memory, and 27 is a mark information memory. Figure 1 Figure 2 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 (a) (Art world theta) 65\ Oi i + I O' 1 (C) 66 ~ o o o 1+ + l I
+Figure 11 (a)

Claims (4)

[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. An electronic file system equipped with an image output means, comprising an identification means for identifying the optical mark reading sheet and the document sheet output from the image output means, and for identifying the skew amount of the optical mark reading sheet. A mark information detection device characterized by: (2) The mark information detection device according to claim (1), characterized in that the image reading operation of the image reading means is stopped when the skew amount identified by the identification means exceeds a predetermined value. . (3) The mark information detection device according to claim (1), wherein the optical mark reading sheet and the document sheet are automatically conveyed to the document reading position. (4) When the automatically transported optical mark reading sheet exceeds the skew amount set in the identification means, the optical mark reading sheet is ejected and the next document sheet is automatically transported. A mark information detection device according to claim (1).