JPS63316288A - Character recognizing device - Google Patents

Abstract

PURPOSE:To improve a reading efficiency and to lower an erroneous reading ratio by segmenting a character by one character, comparing and synthesizing a recognized result for every one character with a result obtained by segmenting more than two characters together and recognizing as the character of more than two characters. CONSTITUTION:A control part 1 transmits a control signal (a) to a character segmenting circuit 2 to segment the one character, transmit a control signal (c) and store in the recognition result of the one character in a memory 11. Subsequently, the control signals (a), (c) are generated to recognize a second character and store in the recognition result in the memory 11. At this time, since the input pattern of a memory 4 is a pattern in which the two characters are connected, the control signals (f), (b), (c) are generated to segment and recognize the two characters. The control part 1 generates a control signal (e) and a general decision part 12 segments every one character at the time of setting a switch 13 to an A mode and segments the characters together and defines the recognized result to be a decision result when a decision is impossible. At the time of setting the switch 13 to a B mode, when the results for segmenting the one character and the two characters coincide, it is defined to be the decision result.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a character recognition device.

[Conventional technology]

Conventional character recognition devices, even when recognizing two or more characters written together, separate the characters into individual characters and perform recognition processing on each character.

[Problem that the invention seeks to solve]

The above-mentioned conventional character recognition device has the disadvantage that it often causes illegibility (inability to read) and misreading because it separates characters one by one when recognizing two or more characters stuck together.

For example, as shown in Figure 3, when recognizing a character written with two zeros attached in a character frame, 1
Because each character is separated and recognized for each cut-out character pattern, information about the connection between characters is lost, resulting in the number zero "0" being misread as "6" or being unreadable. There were cases where this was the case.

In addition, in order to reduce the above drawbacks, as shown in Figure 4, the conditions for character extraction were changed, character extraction and recognition were performed multiple times (three times in the figure), and the characters were comprehensively judged. There was a method to do this (in the case of the figure, the one that could be read was used), but it took a lot of time to extract and recognize the characters, and it required large-scale hardware.

[Means for solving problems]

In order to solve such problems, the character recognition device according to the present invention has a single character recognition means that cuts out characters one by one and recognizes them one by one, and a single character recognition means that separates two or more characters into two characters without dividing them into individual characters. The recognition result is based on the multi-character recognition means that cuts out the above characters together and recognizes them as two or more characters, the results of cutting out characters one by one and recognizing them one by one, and the results of cutting out two or more characters together and recognizing them as two or more characters. A comparison and synthesis means for comparing and synthesizing the information is provided.

[Effect]

In the character recognition device according to the present invention, when recognizing two or more characters stuck together, the reading rate improves and the misreading rate decreases.

[Embodiment] FIG. 1 is a schematic system diagram showing essential parts of an embodiment of a character recognition device according to the present invention. In FIG. 1, 1 is a control unit that controls the entire device, and the control unit l is a control signal a,
b, c, d, and e can be generated. 2.3 is a character cutting circuit. Each memory 4.5 is connected via a bus 6.7. The character cutting circuit 2 cuts out one character from the human character image stored in the memory 4 in response to the control 0 signal a from the control unit 1, and stores the cutting pattern in the memory 5. If two or more of the cut-out characters are connected, the cut-out pattern is stored as described above, and an identification signal f is generated. The character cutting circuit 3 cuts out two characters from the input character image input to the memory 4 in response to a control signal, and stores the cutting pattern in the memory 5.

8.9 transfers the cutting pattern stored in the memory 5 to the bus 7.
These circuits are activated by control signals c and d from the control unit 1, respectively, and store the recognition results in the memory 11 via the bus 10. The recognition circuit 8 includes a recognition dictionary 81 for recognizing characters cut out one by one.
It has a built-in and is used to recognize characters cut out one by one. The recognition circuit 9 has a built-in recognition dictionary 91 for recognizing characters cut out for two characters.
Used to recognize characters that are stuck together.

The character extraction circuit 2 and the recognition circuit 8 constitute a single character recognition means, and the character extraction circuit 3 and the recognition circuit 9 constitute a plural character recognition means.

Further, the information was stored in the memory 11 on the bus 10.

A comprehensive determination section 12 is connected as a comparison and synthesis means for comprehensively determining recognition results, and is activated by a control signal e from a control section l. A switch 13 is connected to the comprehensive determination section 8, and mode A is selected.

You can switch between two modes: Mode B. Mode A means normal mode, and mode B means high precision mode.

Next, the operation of the apparatus shown in FIG. 1 will be explained. Second
The figure is a character pattern diagram showing an example of a character pattern recognized by this device. In the same figure, the numbers “5” and “6”2
Character 21, which is a combination of letters, is written. It is assumed that the switch 13 is set to mode A. It is assumed that the input cover pattern 21 shown in FIG. 2 is stored in the memory 4 in advance. First, the control unit l generates a control signal a to the character cutting circuit 2 to cut out one character,
Furthermore, a control signal C is generated, and the recognition result for one character is stored in the memory 11. Subsequently, control signals a and c are generated in the same manner, the second character is recognized, and the recognition result is stored in the memory 11. At this time, since the cover pattern with 40 memories is a pattern in which two characters are stuck together, the identification signal f is generated from the character cutting circuit 2 when the first character is cut out.
At this time, the control unit 1 also sequentially generates control signals S and C to the character cutting circuit 3 to cut out two characters and recognize the two characters. In Figure 2, 22
．． 23 is a one-character cutting pattern, and 24 is a two-character cutting pattern. The cutout patterns 22 and 23 are recognized by the recognition circuit 8 that uses the recognition dictionary 81, and the cutout pattern 24 is recognized by the recognition circuit 9 that uses the recognition dictionary 91. The recognition results are 5'' for cutout pattern 22 and ``?'' for cutout pattern 23. ”, that is, unreadable, and for the cutout pattern 24, it is “56”.

Next, the control section 1 generates a control signal e and performs comprehensive determination. When the switch 13 is set to mode A, the comprehensive judgment section 12 takes the result as the judgment result even if it cannot recognize each character by cutting them out one by one, but when it cuts out two characters together and recognizes them. Also, when the switch 13 is set to mode B, only when the result of recognition by cutting out one character at a time matches the result of recognition by cutting out two characters together, that result is used as the judgment result, and in other cases are not readable.

Table 1 shows examples of determination in each case of mode A and mode B.
1 Shown in Table 2. In Table 1, in the case of numbers 2.degree.3, etc., even if unreadable characters occur when characters are extracted one by one, if they can be recognized when two characters are extracted together, the recognition result is used as the determination result.

Further, in Table 2, in the case of number 1.2, etc., even if a misreading occurs when cutting out one character at a time, the determination result is corrected to be unreadable.

Since the input example in FIG. 2 corresponds to number 2 in Table 1, "56" is obtained as the overall judgment result.

As described above, this apparatus can perform character recognition on the cover pattern of two characters stuck together, as shown in FIG. Note that in this device, the memory 4
In order to recognize a character pattern written one character at a time (without touching) and store the recognition result in the memory 11, it is sufficient to sequentially generate control signals a and c from the control unit 1. This is clear from the above explanation.It goes without saying that this device can also be applied to recognize characters that are three or more characters together by expanding the character extraction circuit and character recognition circuit. do not have.

Furthermore, in this device, if switch 7 is set to mode A, even if one character is extracted one by one and cannot be recognized, if two characters are extracted and recognized together, the result will be used as the judgment result. As a result, the read rate can be improved. In addition, if switch 7 is set to mode B, only when the result of recognition by cutting out one character at a time matches the result of recognition by cutting out two characters together, that result will be used as the judgment result, and in other cases, Since the information is not readable, the misreading rate can be reduced as a result. At this time, character extraction/recognition is performed only twice for each character at most, so when compared with a method in which character extraction/recognition is performed multiple times by changing the character extraction conditions, it can be seen that the processing time can be reduced.

〔Effect of the invention〕

As explained above, the present invention cuts out characters one by one and recognizes them one by one, and cuts out two or more characters together and recognizes them as two or more characters without separating them into individual characters. When recognizing two or more characters joined together by comparing and synthesizing the recognition results from the results of cutting out one character at a time and recognizing them one by one, and the results of cutting out two or more characters together and recognizing them as two or more characters. Since various judgments can be made, the reading rate can be improved and the misreading rate can be reduced.

- If two characters are extracted and recognized at the same time in C, the number of categories in the recognition result will increase, but if the types of characters that can be read are limited and the number of categories does not increase significantly, for example, when only numbers are written, the number of categories in the recognition result will increase. The invention is particularly effective.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of the character recognition device according to the present invention, Fig. 2 is a character pattern diagram for explaining its operation, and Figs. FIG. 2 is an explanatory diagram for explaining a method for recognizing characters that are stuck together. DESCRIPTION OF SYMBOLS 1...Control part, 2,3...Character cutting circuit, 4,5゜11...Memory, 6,7.10...Bus, 8,9.
... Recognition circuit, 12... Comprehensive judgment unit, 13... Switch, 81.91... Recognition dictionary.

Claims (1)

[Claims] A single character recognition means that cuts out characters one by one and recognizes them one by one, and a plurality of character recognition means that cuts out two or more characters together and recognizes them as two or more characters without separating them into individual characters. Character recognition characterized by comprising a comparison and synthesis means for comparing and synthesizing the recognition results from the results of cutting out characters one by one and recognizing them one by one and the results of cutting out two or more characters together and recognizing them as two or more characters. Device.