JPH0520479A - Automatic slice value setting device - Google Patents

Abstract

PURPOSE:To set a slice level adjusted to the printing density of whole paper by printing a specified pattern on one head line in read paper, comparing it with data which is previously registered so as to obtain a difference and automatically setting the slice level of a converter. CONSTITUTION:A converter 1 optically reads the specified printing pattern which is printed on one head line of read paper 5 and converts it into an electric signal in OCR and OMR. A recognition circuit 2 inputs a signal obtained by reading the specified printing pattern from the converter 1, compares it with specified pattern data which is previously registered in an internal part, judges the difference and transmits the result to a slice value control circuit 3. It alters a slice value by the judgement result and informs a converter control circuit 4 of it. The converter control circuit 4 judges the slice value of the converter 1 by the designation. Thus, the reading of OCR and OMR can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic slice value setting device for automatically setting a slice value when reading a print character pattern or a print mark pattern in an optical character reading device, a mark card reader or the like. .

[0002]

2. Description of the Related Art In an optical character reader (OCR), mark card reader (OMR), etc., a conventional slice value setting for setting a slice value when reading a print character pattern or a print mark pattern (print pattern) The means defines the print density in advance and reads the print pattern by a fixed reference slice value for the print density, or recognizes the print pattern of a specific portion of the read paper (paper) and slices the slice corresponding thereto. This is done by setting the value.

[0003]

In the former case of the above-mentioned conventional slice value setting means, the former has only a constant reference value, and therefore, when the print density of the entire paper largely deviates from the reference value, the There are drawbacks that it becomes impossible to read the print pattern on the paper, and it is impossible to set an appropriate slice value corresponding to the print density.

On the other hand, in the latter case, since the slice value is set by recognizing the print pattern of the specific portion of the paper, when the print density of the specific portion deviates from the print density of the entire paper, There is a problem that the entire sheet cannot be read.

[0005]

SUMMARY OF THE INVENTION An automatic slice value setting device according to the present invention comprises a converter for optically reading a reading paper having a specific pattern printed on the first line and converting it into an electric signal. The recognition circuit that inputs the read signal of the specific pattern from the instrument and compares it with the specific pattern data registered in advance, and the slice value is determined by the determination result of the recognition circuit. A slice value control circuit that specifies the slice value and a converter control circuit that sets the slice value of the converter according to the specification of the slice value control circuit are provided.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

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

In FIG. 1, the converter 1 is an OCR or OM.
In R, a specific print pattern printed on the first line of the read paper (paper) 5 is optically read and converted into an electric signal. The recognition circuit 2 inputs a signal obtained by reading a specific print pattern from the converter 1, compares it with specific pattern data registered in advance, determines the difference between them, and determines the result as a slice value. Send to the control circuit 3. If the determination result in the recognition circuit 2 is the same as before, the slice value control circuit 3 sets the slice value as it is, and if it is different from the previous one, the slice value is changed and the slice control value is notified to the converter control circuit 4. The converter control circuit 4 is
The slice value of the converter 1 is set according to the designation from the slice value control circuit 3.

[0009]

As described above, the automatic slice value setting device of the present invention prints a specific pattern on the first line of the reading paper, recognizes it, and compares it with the data registered in advance. The difference between the two is calculated, and the slice level of the converter is automatically set according to the difference, so that there is an effect that the slice level can be set according to the print density of the entire paper, and therefore the reliability of OCR and OMR reading is improved. There is an effect that it can be improved.

[Brief description of drawings]

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

[Explanation of symbols]

1 converter 2 recognition circuit 3 slice value control circuit 4 converter control circuit 5 Reading paper (paper)

Claims (2)

[Claims] 1. A converter for optically reading a reading paper having a specific pattern printed on the first line and converting the reading paper into an electric signal, and inputting a reading signal of the specific pattern from the converter. A recognition circuit for comparing the specific pattern data registered in advance with the determination of the difference between them, a slice value control circuit for specifying a slice value according to the determination result of the recognition circuit, and a slice value control circuit An automatic slice value setting device, comprising: a converter control circuit for setting a slice value of the converter by designation. 2. A converter mounted on an optical character reading device, a mark card reader or the like, for optically reading a specific pattern printed on the first line of the reading paper and converting it into an electric signal. The recognition circuit that inputs the read signal of the specific pattern from the instrument and compares it with the specific pattern data registered in advance, and the slice value is determined by the determination result of the recognition circuit. An automatic slice value setting device comprising: a slice value control circuit for specifying; and a converter control circuit for setting a slice value of the converter according to the specification of the slice value control circuit.