JPH0691983A - System for detecting lines of passbook printer - Google Patents

Abstract

PURPOSE:To detect the extent of printed data correctly using a printer which prints data on a document at a banking institution. CONSTITUTION:The subject method for detecting lines uses an A/D conversion part 2 which converts an analog signal from an image scanner 1 and an image scanner 1 to a digital signal, a buffer 3 which stores a digital signal equal to a single line obtained by conversion and a counting/interpretation part 4 which counts the number of black dots in the buffer 3. Further, this counting/ interpretation part 4 determines whether data is printed or it is contaminated using the number of black dots in the line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line detection system for a passbook printer.

[0002]

2. Description of the Related Art A line detection method of a conventional passbook printer detects a line depending on a black dot in a specific print area.

FIG. 3 shows an example of checking whether or not a date column is printed. The light from the issuing unit 112 enters the light receiving unit 113 as the reflected light from the date column of the passbook, is converted into an electric signal, is passed through the amplifier 110, and the determination unit 111 determines whether or not the signal is printed by the level of the signal. Was there. If it was printed, it was judged that the amount of reflected light would decrease.

[0004]

In the prior art, when dirt adheres to a specific print area, it is erroneously detected and there is a possibility of printing by skipping a line.

[0005]

SUMMARY OF THE INVENTION A passbook line detection system according to the present invention includes an image scanner, a conversion unit for converting an analog signal from the image scanner into a digital signal, and the converted digital signal information for one line. It is configured to include a buffer to be stored and a unit for calculating the number of black dots in the buffer and detecting how much is printed.

[0006]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. The image scanner 1, the A / D converter 2 for converting an analog signal into a digital signal, the buffer 3 for storing one line of image information, the number of black dots in the buffer 3 are calculated. , And a counting / judging unit 4 for judging that printing has been completed.

Under the control of the control unit 5, the analog signal from the image scanner 1 is converted into a digital signal by the A / D conversion unit 2 in synchronization with the conveyance of the passbook by the conveyance mechanism 6. The converted digital image signal is stored in the buffer 3 by the synchronization signal from the transport mechanism 6. A / D converter 2
The simplest example of digitization of "2" of "0" and "1"
The operation of the counting / judging unit 4 in the case of digitization will be described.

The number of black dots in the buffer is counted by setting the printed black portion to "1" and the white portion to "0". An example of the counting method is shown in FIG. The logical sum is calculated in the vertical direction in units of printing area for one character. This logical sum is calculated for each print area, and the calculation result for each print area is "0".
Sum those that are not. If the print area is not “0”, it is determined that something is printed on the print area or there is some stain. "0" when printing more than the minimum number of characters
If there is a non-printed area, it is determined that the line is printed, and the control unit 101 is notified. If the print area that is not "0" is less than the minimum printable number,
The control unit 5 is notified that it is determined that the image is not stained and that it is not printed.

[0010]

As described above, according to the present invention, in detecting a printed line in a printer that prints on a passbook,
It is effective in preventing erroneous detection due to dirt.

[Brief description of drawings]

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

FIG. 2 is a schematic diagram showing an example of a counting method of a counting / judging unit.

FIG. 3 is a block diagram showing a conventional example.

[Explanation of symbols]

 1 Image Scanner 2 A / D Converter 3 Buffer 4 Counting Judgment Unit 5 Control Unit 6 Conveyance Mechanism 120 Passbook

Claims (1)

[Claims] 1. An image scanner, a conversion unit for converting an analog signal from the image scanner into a digital signal, a buffer for storing the converted digital signal information for one row, and a number of black dots in the buffer. However, a line detection method for a passbook printer, characterized in that it includes means for detecting how much is printed.