JPH0512484A - Optical character recognizing device - Google Patents

Abstract

PURPOSE:To considerably reduce correction conventionally executed by an operator. CONSTITUTION:A recognition part 2 segments a character from an image signal from a scanner part 1, recognizes it and afterwards stores a character code and a candidate character code in a character code storage memory 6 and a candidate character code storage memory 7, and an arithmetic part 3 collates the validity of the character code. When the code is illegal, a replacement part 5 extracts and outputs the candidate character code as a replaced system. The arithmetic part 3 collates the validity again with the replaced character code, when the proper character code is obtained, the character code in the character code storage memory 6 is replaced with the proper character code, and an output part 4 outputs this character code.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical character recognition device, and more particularly to an optical character recognition device having a function of verifying the validity of a character code according to an arithmetic expression or the context of Japanese.

[0002]

2. Description of the Related Art In a conventional optical character recognition device, when a plurality of similar character codes are candidates for a character to be recognized, the character is output as an unreadable character. In addition, the validity was checked by an arithmetic expression or Japanese context processing specification, and if the validity was incorrect, it was output as an invalid code. When unreadable characters and illegal codes are output, the operator corrects them by reading the image displayed on the form or the screen of the console.

FIG. 3 is a block diagram showing an example of a conventional optical character recognition device. The characters on the form are photoelectrically converted by the scanner unit 1 and sent to the recognition unit 2 as an image signal. The recognition unit 2 outputs the character code of the recognition result to the calculation unit 3. The arithmetic unit 3 collates the recognized character code with a character code designated by an arithmetic expression or Japanese context processing specification, and sends the character code to the output unit 4 as normal data when it is normal and as invalid data when it is incorrect. . The output unit 4 outputs the character code to a medium or a connected device.

[0004]

In this conventional optical character recognition device, when a plurality of candidate character codes are generated in recognition of characters having similar character shapes such as "so" and "n", it is impossible to discriminate or There was a problem that it was often misread and the correction work by the operator increased. On the other hand, the character writer had to write down the glyphic features of these characters clearly.

[0005]

The optical character recognition device of the present invention recognizes a character by cutting out a character from the image signal and a scanner section for photoelectrically converting a character into an image signal by scanning on a paper surface. A recognition unit that outputs a character code and a character code candidate, and a selection output unit that selects and outputs a character code suitable for an arithmetic expression or a context from the character code candidate group are provided.

The selection and output means compares the character code with an arithmetic expression specified in advance or a context processing specification to check the validity of the character code, and the character code invalidated by the arithmetic section. A replacement unit that replaces the character code selected from the character code candidate group and an output unit that outputs the valid character code and the replaced character code may be configured.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the optical character recognition device of the present invention.

The characters on the form are photoelectrically converted by the scanner unit 1 and sent to the recognition unit 2 as an image signal. Recognition unit 2
After cutting out the character and recognizing it, the character code is stored in the character code storage memory 6, and the character code candidate and the candidate priority are stored in the candidate character code storage memory 7. When the processing of the recognition unit 2 is completed, the arithmetic unit 8 of the arithmetic unit 3 follows the instruction of the arithmetic instruction storage memory 9 and stores the character code storage memory 6
Check the validity of the character code in. When the validity is incorrect, the incorrect character code and the character position information are sent to the replacing unit 5. In the replacement unit 5, the candidate character position extractor 10 extracts the candidate character code to be replaced from the candidate character code storage memory 7, and the candidate priority comparator 11 compares the priorities of the candidate character codes to be replaced, Replacement code output device 12
Outputs the highest priority candidate character code. The calculation unit 3 again checks the validity of the replaced character code, and if the character code is incorrect, requests the replacement unit 5 to replace the character code again. Replacement unit 5
Selects the candidate character code having the next highest priority and outputs it to the arithmetic unit 3. In this way, collation and replacement are repeated, and when a valid character code is obtained, the character code in the character code storage memory 6 is replaced with the valid character code. Do not replace if a valid character code cannot be obtained. When the calculation is completed, the output unit 4 outputs the character code in the character code storage memory 6 to a medium or an external device.

FIG. 2 is an explanatory view showing an example of character code replacement in this embodiment. FIG. 2 (a) shows an example of character code replacement in a field in which a numerical operation is designated.
(B) shows an example of character code substitution in reading Japanese Katakana depending on the Japanese context.

In FIG. 2 (a), the recognition unit 2 recognizes the character code as "01 + 05 = 08", and the calculation unit 3 judges that "8" is an illegal code according to the calculation formula. The replacement unit 5 selects the candidate character code “6” from the candidate character code storage memory 7 and replaces “8” with “6”, and the output unit 4 outputs the replaced character code “01 + 05 = 06”. Similarly, in FIG. 2B, the unreadable character “?” In the character code from the recognition unit 2 is selected from the candidate characters “n” and “so” by selecting the valid “so” by the context processing designation. Then, the output unit 4 outputs the character code “Reizouko” after the replacement.

[0011]

As described above, according to the present invention, when the recognition result of a single character is invalid by collating with a previously designated arithmetic expression or the designation of the Japanese context, it is selected from the candidate character group. Since a legitimate character code can be selected and replaced, the correction work conventionally performed by the operator can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an optical character recognition device of the present invention.

FIG. 2 is an explanatory diagram showing a replacement example of a character code according to the present embodiment.

FIG. 3 is a block diagram showing an example of a conventional optical character recognition device.

[Explanation of symbols]

1 Scanner section 2 recognition section 3 operation part 4 Output section 5 Replacement part 6 Character code storage memory 7 Candidate character code storage memory 8 arithmetic unit 9 Operation instruction storage memory 10 Candidate character position extractor 11 Candidate priority comparator 12 Replacement code output device

Claims (2)

[Claims] 1. A scanner unit for photoelectrically converting a character into an image signal by scanning on a paper surface, and a recognition unit for outputting a character code and a character code candidate recognized by cutting out one character from the image signal. An optical character recognition device, comprising: a selection output unit that selects and outputs a character code suitable for an arithmetic expression or a context from the character code candidate group. 2. The selecting and outputting means compares the character code with an arithmetic unit that preliminarily specifies an arithmetic expression or a context process specification to check the validity of the character code, and the character code that is illegal by the arithmetic unit. An optical character recognition device comprising: a replacement unit that replaces a character code selected from a group of character code candidates, and an output unit that outputs the valid character code and the replaced character code.