JPS6156657B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention automatically distinguishes between a normal original and a mark sheet from an image signal of the original transmitted from a remote location through a communication line, and in the case of a mark sheet, recognizes the marks. , relates to a mark recognition device that records a normal document as it is.

A conventional device of this type is shown in FIG. In the figure, 20 is a communication line, 1 is a receiving unit that receives the image signal of the original, and 2 is this receiving unit 1.
A mark sheet identification section 3 identifies whether the document is a mark sheet or a general document from the image signal received by the mark sheet identification section 3. When the identification result of the mark sheet identification section 2 is a mark sheet, 3 detects the inclination of the mark sheet from the image signal. Tilt detection unit for
4 is a tilt correction section for correcting the tilt of the mark sheet in the image signal according to the detection result of the tilt of the mark sheet obtained by the tilt detection section 3;
is a mark recognition unit that recognizes marks from the image signal corrected by the tilt correction unit 4; 6 is a storage unit that stores the recognition results of the mark recognition unit 5; and 7 is a document that has been sent as a result of identification by the mark sheet identification unit 2. This is a recording unit for recording a received image as it is without recognizing it when the received image is a general document. 8 is a control section that controls the entire system.

Next, the operation will be explained. In conventional mark recognition devices, in order to distinguish between mark sheets and general documents, mark sheets are
The mark sheet identification mark DM is printed in a straight line in the center of the upper edge of the MS. When the image signal is received by the receiving section 1, the mark sheet discriminating section 2 detects from the image signal whether or not the mark sheet discriminating mark DM exists on the transmission document.
If the mark sheet identification mark DM is detected by the mark sheet identification section 2, it is determined that the received document is a mark sheet, and then the skew detection section 3 uses the skew detection line IM printed on the entire width of the mark sheet MS. The inclination of the mark sheet MS is detected, and based on the result of the inclination detection, the inclination correction section 4 corrects the influence of the inclination of the mark sheet MS on the image signal. Next, the mark identification section 5 recognizes the mark PPM indicating the position of the mark reading position instruction mark PM and the mark information in the mark entry field M arranged at the position indicated by the instruction mark PM, and stores it in the storage section 6. . If the mark sheet identification mark DM is not detected in the mark sheet identification section 2, it is determined that the received document is other than a mark sheet, that is, a general document, and
The received image signal is output and displayed from the recording section 7 without recognition processing.

A conventional mark recognition device with a mark sheet identification function prints the mark sheet identification mark in the center part of the mark sheet, far away from the tip T (upper end in Figure 2), in order to detect the mark sheet identification mark in the center part of the mark sheet. Therefore, there was a large area from the tip T to the identification mark DM that could not be used for writing mark information. Therefore, there was a drawback that the mark sheet could not be used effectively.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional one, and the same identification marks of the mark sheet are placed on both sides of the leading edge of the sheet, and a mark for detecting the inclination of the mark sheet is placed between them. To provide a mark recognition device which can quickly identify a mark sheet and a general document after starting reception and can enlarge the area of a mark entry field usable on a mark sheet more than ever before.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 3, 20 is a communication line, 1 is a receiving section, 10 and 11 are left and right mark sheet discrimination sections, and these are the tip T of the mark sheet MS.
This is to detect the mark sheet identification mark DM' printed on the mark sheet, and one of the identification marks DM' will be detected earlier depending on the inclination of the mark sheet. When either of the identification marks DM' is detected, it is determined that the input document is a mark sheet. 12 is the tilt detection line printed on the mark sheet MS
This is a tilt detection section that detects the tilt of a mark sheet using IM', and this is a tilt detection section that detects the tilt of a mark sheet using IM'.
The detection process is performed in parallel with the left and right mark sheet discrimination process in step 11. Reference numeral 9 denotes a control unit which detects the discrimination results of the mark sheet discrimination units 10 and 11 and the inclination detection unit 1.
The data flow of the received image signal is controlled based on the slope detection result of step 2. 4 is a tilt correction section, and tilt detection section 1
The influence of the inclination of the mark sheet MS on the image signal is removed under the control of the control unit 9 according to the detection result of step 2. Reference numeral 5 denotes a mark recognition section which recognizes mark information in the mark entry field M arranged at the position indicated by the mark reading position indication mark PM from the image signal corrected by the inclination correction section 4.
Reference numeral 6 denotes a storage unit that stores the mark recognition results obtained in the mark recognition unit 5. Reference numeral 7 denotes a storage unit that stores the mark recognition results obtained by the mark recognition unit 5. A reception unit 7 stores the mark recognition result obtained by the mark recognition unit 5. This is a recording section that records image signals as they are.

Next, the operation will be explained.

First, in this apparatus, a mark sheet as shown in FIG. 4 is used. This is different from the conventional mark sheet example shown in Figure 2, in which a pair of identification marks are placed at the left and right ends of the mark sheet MS.
DM', and an inclination detection line IM' is located in the center between these identification marks DM'.
Note that the marks DM'' at the left and right ends of the left and right identification marks DM' also serve as the mark PPM for indicating the position of the mark reading position indicating mark PM shown in FIG. 2 above.

The image signal received by the receiving section 1 is first sent to the left and right mark sheet discriminating sections 10 and 11 and the tilt detecting section 12 under the control of the control section 9. The received image signal of the leading edge of the original is subjected to the discrimination by the mark sheet discrimination sections 10 and 11 or the detection processing by the tilt detection section 12 at the left, center, and right sections for each scanning line. The results are sent to the control section 9. In this way, mark sheet discrimination and tilt detection processing are performed in parallel. The mark sheet discriminating section 10 or 11 determines that the input document is a mark sheet when the identification mark DM' is detected in either one. For this reason, unlike before, mark sheets
Since it is determined that the MS is a mark sheet very quickly after it is input, the area of the mark sheet that can be used for inputting mark information can be increased and the sheet can be used effectively. For example, as shown in FIG. 5, the mark sheet MS is tilted and the right mark sheet identification mark DM' has already been detected, but the left mark sheet identification mark DM' has not yet been detected on the scanning line L. , the mark written in the mark entry field M can be recognized. If the mark sheet discrimination sections 10 and 11 determine that the sheet is a mark sheet, after the detection by the tilt detection section 12 is completed, the received image signal is sent to the tilt correction section 4, and is corrected according to the detection result of the tilt detection section 12. The mark information in the mark entry field M is recognized by the mark recognition section 5, and the recognition result is stored in the storage section 6. On the other hand, if the mark sheet determining sections 10 and 11 determine that the document is not a mark sheet, that is, it is a general document, the received image signal is immediately sent to the recording section 7 without being recognized and output as an image.

By the way, the feature of this device is that in order to distinguish between mark sheets and general documents, a pair of left and right identification marks are printed on the leading edge of the mark sheet, and as soon as the mark sheet is received, the left and right mark sheet discriminators detect the identification marks. If a mark is detected, it is determined that the sheet is a mark sheet. Therefore,
As long as the left and right identification marks to be printed on the mark sheet have the same shape, the thickness, number, and spacing of the lines are not limited to those of the above embodiment, and can be freely selected.

As described above, according to the mark recognition device according to the present invention, a pair of left and right identification marks are printed on both ends of the leading end of a mark sheet, and a tilt detection mark for detecting the tilt of the mark sheet is provided between the identification marks. The configuration is configured to print and simultaneously detect these identification marks on the left and right sides in parallel processing at the same time as they are received, so even if the mark sheet is tilted, the judgment can be made when either the left or right identification mark is detected. and immediately move on to mark recognition.
Therefore, the area occupied by the mark entry field in the mark sheet can be increased, and the information density of the mark sheet can be increased.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a conventional mark recognition device.
FIG. 2 is a diagram showing a mark sheet used in the device, FIG. 3 is a block diagram of a mark recognition device according to an embodiment of the present invention, and FIG. 4 is a diagram showing a mark sheet used in the mark recognition device of the present invention. FIG. 5 is an explanatory diagram showing the relationship between the inclination of the mark sheet and the scanning line. DESCRIPTION OF SYMBOLS 1... Receiving section, 4... Tilt correction section, 5... Mark recognition section, 6... Storage section, 7... Recording section, 10...
...Left mark sheet discrimination section, 11...Right mark sheet discrimination section, 12...Tilt detection section, 20...Communication line. In the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A receiving unit that receives the image signal of the original transmitted from a remote location through a communication line, and a signal that distinguishes the image information received by this receiving unit from the normal original written on both ends of the leading edge of the original. a mark sheet discrimination unit that recognizes the identification symbol; a skew detection unit that detects the skew of the document from the skew detection mark written between the identification symbols when the identification symbol is recognized; a tilt correction section that corrects the tilt of an image signal of a document based on the tilt; a reading position indication mark detection section that detects a mark reading position indication mark written at a predetermined position from the image signal of the document whose tilt has been corrected; a mark recognition unit that recognizes and determines the mark information in the area indicated by the mark reading position indication mark; a storage unit that stores the recognized mark information; What is claimed is: 1. A mark recognition device comprising: a recording section that records a received image signal of a document as it is when the image signal of a received document is not recognized.