JPH0321950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical character reading device in an electronic computer system.

In recent years, with the development of OCR technology (optical character reading technology), various OCR devices with high precision and excellent operability have been produced. For example, as a measure to improve reading accuracy, when identifying a certain character in text processing recognition, there is a method that always refers to the characters before and after that character to help identify the corresponding character. On the other hand, in terms of operability, for example, if unreadable characters are detected, the CRT
In some systems, a corresponding character pattern for one character as shown in FIG. 1 is displayed above, and the operator refers to the pattern and corrects the character.

However, with such conventional methods, for example, if "〓" (handakuten) is identified after "a",
Since "〓" is not appended to any characters other than the characters in the Ka, Sa, Ta, and C lines, the pattern is displayed as a reject character, but the operator pays attention only to the pattern of "〓" and corrects the "〓" by key-in. It may be stored away. In this case, the solution is to check the key-in characters using software, but this has the disadvantage that it not only puts a heavy burden on the software, but also results in a decrease in the throughput of the entire device. Ta.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical character reading device which can eliminate the above-mentioned drawbacks, prevent erroneous corrections during reject correction in text processing recognition, and improve operability and throughput.

The present invention has achieved the above object by simultaneously displaying the patterns of two characters before and after the character during the reject correction in text processing recognition, and the details thereof will be explained below using examples.

FIG. 2 shows an example of displaying a reject pattern in the case of a text processing error in the present invention.
FIG. 3 is a block diagram showing one embodiment of the present invention. In FIG. 3, 1 is a form with data written in it, 2 is a photoelectric conversion unit, 3 is a preprocessing unit that formats the read character pattern, 4 is an identification unit that identifies the formatted pattern, and 5 is a reject pattern. 6 is an answer editing section that edits the answer of the identification result. The outputs of the pattern buffer section 5 and answer editing section 6 are respectively transferred to the system. FIG. 4 shows an example of the circuit of the pattern buffer section 5.
are first and second shift registers, each having a pattern storage capacity for one character. 9 more
is an inversion circuit, 10 is an AND circuit for obtaining a normal identification reject pattern (for one character), 11 is an AND circuit for obtaining a pattern for sentence processing errors (for two characters), and 12 is for pattern selection. This is an OR circuit for Note that the signal A is an error signal sent from the identification unit 4 when a text processing error occurs, and becomes high level at the time of an error. Signal B is pattern data, signal C is shift registers 7 and 8
These are the data acquisition shift clock and transfer clock. The shift clock is controlled so that when a text processing error or identification reject is detected, the shift is stopped and no further data is taken in.
Furthermore, the transfer clock is controlled so that it is generated only for the number of data required when displaying on a CRT. Signal D is select pattern data.

Next, the operation shown in FIG. 4 will be explained. First, pattern data B is always transferred from the preprocessing section 3 and sequentially shifted from shift registers 7 to 8 by the shift clock. At this time, the timing is such that the pattern being identified is stored in the shift register 7, and the pattern that has been identified is stored in the shift register 8. Normally, when identification is performed normally, the pattern data is simply shifted out, and the system samples the pattern data only when identification rejects or text processing errors occur. When the result of identification is a text processing error, the text processing error signal A output from the identification section 4 becomes high level.

This opens the gate of AND circuit 11. Therefore, the pattern stored in the shift register 8 is transferred to the system side for display via the AND circuit 11 and the OR circuit 12. Also,
The pattern stored in the shift register 7 is
Shift register 8, AND circuit 11, OR circuit 12
It is forwarded to the system side for display via .

The present invention is as described above, and (i) in the case of a text processing error, the preceding and succeeding characters are displayed simultaneously, so that the "〓" after "A" illustrated in FIG. Since it can be confirmed that the error is due to processing, it can be easily and accurately corrected, and throughput can be improved. (ii)
Even if the next character causes a sentence processing error because the previous character was misread (for example, "ku" → "wa"), the previous character can be checked at the same time, so the misreading can be corrected.

[Brief explanation of the drawing]

Figure 1 shows an example of a conventional display pattern, Figure 2 shows an example of a conventional display pattern.
3 is a block diagram showing an embodiment of the invention, and FIG. 4 is a circuit diagram showing a detailed example of a part of FIG. 3. 4: pattern identification section, 5: pattern buffer,
7: first shift register, 8: second shift register, 11: gate circuit, A: error signal.

Claims (1)

[Claims] 1 An optical character reading device equipped with a CRT display device, comprising a first storage means for storing a character pattern for one character currently being read, and a character pattern read immediately before the character pattern currently being read. a second storage means for storing a character pattern for one character; and a character stored in the first and second storage means when the character pattern stored in the first storage means cannot be read; An optical character reading device comprising means for displaying a pattern on the CRT display device.