JPH0296465A - Mark recognizing system - Google Patents

Abstract

PURPOSE:To accurately check mark data in a short time by finely checking the data in a valid area and coarsely checking the line data out of the valid area. CONSTITUTION:In an ordinarily used mark sheet, on an Lo line where an L0-1 is skipped, whether data marked by a line data identifying part 6 exist or an invalid line exits in a one line picture signal sent from an L0 line picture signal output part 3 is decided. Further, whether the valid data exist or the invalid line exists is decided. When the marked data do not exist, or when the invalid line exists, its information is conveyed to a line skip control part 5, a control signal is sent from the control part 5 to a change-over switch 8, an L1 line picture signal output part 3 is selected, and the number of lines to identify and decide the sent picture signal is made loose.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a mark recognition method.

Conventional technology Conventional mark sheet recognition involves reading one page of mark sheets at a certain line density and marking them, even though there are valid areas with mark information and invalid areas with no mark information in the mark sheet. Information recognition processing is being performed.

Problems to be Solved by the Invention The conventional mark recognition method described above determines the mark information within the effective area for each line at regular intervals.
In this case, in order to make the determination of mark information more reliable, the line spacing at which the check is performed is made as close as possible.

For this reason, recognition processing is performed on all invalid areas, resulting in a drawback that recognition takes time. Therefore, in such a system, when connecting to a line and trying to perform processing in real time, the processing time becomes a problem, and there is a drawback that real-time implementation becomes impossible.

The present invention was made in order to eliminate the above-mentioned drawbacks inherent in the conventional technology, and therefore, an object of the present invention is to shorten the time required for mark recognition and to make it possible to accurately determine mark information. The purpose of this invention is to provide a new mark recognition method.

Means for Solving the Problems In order to achieve the above object, the mark recognition method according to the present invention uses the data of the mark sheet in the main scanning direction for each line as an image signal for the mark sheet in which mark information is embedded. An image signal reading section that scans and reads the image signal, and identifies whether marked data exists in the read image signal for one line and whether there are continuous valid lines or continuous invalid lines. a line data identification unit for determining whether the marked data exists, and a line number for controlling the next reading image signal line to be read after skipping an arbitrary number of lines depending on whether the marked data exists on a valid line or an invalid line. Contains a skip control section.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram of a program showing one embodiment of the present invention.

Referring to FIG. 1, reference number 1 is an image signal reading section, 2 is an LD line image signal output section that outputs an image signal only when the LO line arrives for each line of image signals sent, and 3 4 is an L1 line image signal output section that outputs an image signal only when the L1 line arrives in response to the sent image signal for each line, and 4 outputs an image signal only when the L2 line arrives for both signals sent for each line L2 line image signal output unit that outputs the image signal for the first time (however, regarding the number of lines, LO > L
l > L2), ji is 1 from the output part of 2.3.4
6 is a line data identification section, 7 is a storage section, 8 is a changeover switch, and 9 is a skip image signal output section.

The image signal of the mark sheet is sent to the image signal reading section 1 for each line.
0 and input to each LO line picture signal output section 2, L1 line picture signal output section 3, and L2 U/R picture signal output section 4.0 In the normally used mark sheet, at the beginning of the mark sheet, Since mark information is not entered, the image signal from the first line to the LO-1 line is selected in the LO line image signal output section 2, and the LO line is skipped by the LO line. The one-line image signal sent from the image signal output unit 2 is checked by the line data identification unit 6 to determine whether marked data exists or not, and whether there is a valid line or an invalid line. If the determined and marked data does not exist or if an invalid line exists, the information is transmitted to the line number skip control section 5, and the line number skip control section 5 sends a control signal to the changeover switch 8. , Ll line image signal output unit 3 is selected, and the number of lines for identifying and determining the sent image signal is set to IH. When the line data identification section 6 identifies that a valid line exists, that information is transmitted to the line number skip control section 5, and the changeover switch 8 then selects the L2 line image signal ratio section 4. Then, the number of lines on which the j-by-j judgment of the sent round image signal is performed is made dense.

The image signal determined to be a valid line is stored in the storage section 7.

FIG. 2 shows the above-mentioned operation of line checking of a mark sheet.

As described in detail, according to the present invention, the effective area is checked closely and the line data is checked by skipping the interval of checking the line data after determining that it is an effective area. Perform a rough check. As a result, the time required for mark recognition can be further shortened compared to the conventional checking of line data at regular intervals, and the mark information can be determined accurately.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows the line check state of Marksee 1. DESCRIPTION OF SYMBOLS 1... Image signal reading section, 2... LO line image signal output section, 3... L1 line image signal output section, 4... L2 line image signal output section, 5... Line number skip control Department,
6...Line data identification section, 7...Storage section, 8...
・Selector switch, 9...Skip image signal output section, 1!
...Picture signal output for each line, j2...L
Image signal outputted to the Oth line, j3...image signal outputted for each L1 line, 14...image signal outputted for each L2 line, 15...image signal selected by the changeover switch , J6...Valid image signal, 17...L
Control signal for selecting the 1-line image signal output portion 3, J
8... Control signal for selecting the L2 line image signal output section 4, 19... Control signal for selecting the changeover switch j7.1
Patent applicant: NEC Co., Ltd. Patent attorney: Yutabe Kumagai

Claims (1)

[Claims] An image signal reading section reads the data of the mark sheet containing mark information line by line as an image signal while scanning it in the main scanning direction, and the image signal reading section reads the mark sheet data line by line as an image signal while scanning it in the main scanning direction. A line data identification section for identifying whether marked data exists and determining whether valid lines are continuous or invalid lines, and whether marked data is a valid line or an invalid line. It has a line number skip control section for controlling the next read image signal line to be read after skipping an arbitrary number of lines according to the image signal line, and the effective lines are read finely in the sub-scanning direction, and the invalid lines are read coarsely. A mark recognition method characterized by controlling the mark recognition method.