JPH02272688A - Optical character reader - Google Patents

Abstract

PURPOSE:To reduce miscorrection at the time of correcting a read result by adding hierarchical information to a knowledge processing result based upon a knowledge processor. CONSTITUTION:A hierarchical information adder 22 adds hierarchical information to each candidate character of the recognized result of each field in the knowledge processing result of the knowledge processor 10. The recognized result is sent and displayed to/on a display device 1. Since the candidate character having no hierarchical relation is not displayed at the time of using the hierarchical information, miscorrection at the time of correcting the read result can be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is an optical character reader that reads characters written at predetermined positions on a form and determines the character code representing the character. It is related to the device.

[Conventional technology]

Within the data processing device, all characters are processed in the form of character codes. However, a person recognizes a character from an image of that character, and the data processing device is equipped with a character generator, and when the character code of one character is input into the character generator, the character code is represented by that character code. Outputs an image of a character (referred to as a character image pattern), and creates an image/pattern of this character.
The pattern can be displayed on a display device or printed on a printer.

On the contrary, an optical character reader is a device that generates a character image pattern by photoelectric conversion from characters printed or handwritten on a form, and determines the character code of the character from this image pattern. An optical character reading device is used for the purpose of reading characters expressed in a form that humans can recognize, converting them into a character code form, and inputting the converted character code into a data processing device.

FIG. 4 is a block diagram illustrating a conventional device.

In the figure, (1) is a display device, (2) is an optical character reading device, and (3) is a scanner consisting of a light source (4) and a sensor (5). (6) is the control device, (7) is the scanner control device, (8) is the image memo 1c, (9) is the recognition 8B
Equipment E, < I Q ) is the knowledge processing device, (0) is the form, (12) is the character to the field written on the form (ll), (B) is the field written on the form (11) It is the letter B.

The sensor (5) has a large number of photoelectric conversion elements arranged in the horizontal direction (hereinafter referred to as the X-axis direction), and converts the intensity of the reflected light from the form (11) illuminated by the light source (4) into an electrical signal. Convert. That is, optical information corresponding to one raster in the X-axis direction of the form (11) is converted into an electrical signal and input to the scanner control device (7). The intensity of the reflected light from the white area on the form (11) is strong, and the intensity of the reflected light from each point on the line of the two characters is weak, and the intensity of the output electrical signal is determined according to this intensity. Electrical signals from the scanner (3) are converted into binary signals and stored in an image memory (8) via a scanner control device (7) and a control device (6).

The scanner control device (7) also controls the scanner (3)
When the input of information for one raster in the axial direction is completed, the scanner (3) is moved in the X-axis direction perpendicular to the X-axis to manually input the information for the next raster. scans and sequentially stores the output in image memory (8)
write to. The recognition device (9) is an image memory (8)
The image pattern of each character is read out from the image pattern, and the character code corresponding to the image pattern is determined by a method well known in the art as pattern recognition.

The recognition processing device (10) compares the character code determined by the recognition device (9) with the knowledge dictionary stored in the knowledge processing device (1o) in advance in order to improve the recognition accuracy of the recognition device (9). and finally determine the character code.

Figure 5 shows the recognition results by the optical character reader (2) of the characters written in the field (■2) written on the form (11) and the characters written in field B (13). ) indicates the recognition result of field A, (15) indicates each candidate character, (la) indicates the recognition result of field B, and (17) indicates each candidate character.

Figure 6 shows field A by optical character reading device (2).
Recognition result of field B (14), recognition result of field B (16
) is displayed on the display device (1), and is a diagram showing the result of displaying (
1g) is the display screen, (19) is the recognition result display for field A, (20) is the recognition result display for field B, (
21) is a candidate character display for field B. The recognition result display (19a) for field A displays the first candidate character (15a) of the recognition result (14) for field A, but since this is an incorrect recognition result, the second candidate character (15b) is displayed. ) is selected and the result of modifying and displaying is (19b
). Even if the recognition result display for field A is modified, the recognition result display for field B (20) and the candidate character display for field B (21) do not change.

[Problem to be solved by the invention]

Conventional optical character reading devices are configured as described above, so that the recognition result display for field A (19b), the recognition result display for field B (20), and the candidate character display for field B (21) are displayed. Since unrelated recognition results are also displayed, there is a possibility that the operator may erroneously correct the recognition results when checking or correcting them.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an optical character reading device that can prevent erroneous corrections by not displaying irrelevant recognition results.

[Means to solve the problem]

The optical character reading device according to the present invention is provided with a hierarchical information adding device for adding hierarchical information to the knowledge processing result, and when displaying the reading results on the two display devices, this hierarchical information is used to display the two-hierarchical relationship. Candidate characters that do not exist are not displayed.

[Effect]

Since the optical character reading device according to the present invention does not display candidate characters that are not in a one-layer relationship, it is possible to reduce erroneous corrections when correcting the reading results.

[Embodiments of the invention]

Embodiments of 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. In FIG. 1, the same reference numerals as in FIG. 4 indicate the same or corresponding parts.
(22) indicates a hierarchical information adding device that adds hierarchical information to the knowledge processing result by the knowledge processing device (10).

Figure 2 shows the recognition results by the optical character reader (2) of the characters (12) entered in the field written on the form (11) and the characters (13) entered in field B, and the same reference numerals as in Figure 5 are shown. indicates the same or equivalent part, (23) is each candidate character as a result of recognition in field A, (24) is hierarchical information of each candidate character (23), (25) is each candidate character as a result of recognition in field B, ( 26) shows hierarchical information of each candidate character (25).

Figure 3 shows the field recognition results (14) by the optical character reader (2) and the certification results for field B (16).
It is a diagram showing the result of displaying on the display device (1), (
1g) is the display screen, (19a), (19b) is the recognition result display of field A, (20a), (20b)
is the recognition result display of field B, (21a), (2
1b) is a candidate character display for field B.

Regarding the knowledge processing results by the knowledge processing device (lO).

The hierarchical information adding device (22) stores the recognition results of each field (14), (16), and each candidate character (23), (25).
), add 1st layer information (24) and (26).

This recognition result (14).

(16) is sent to the display device (1) and displayed. The display screen (I8) shows the recognition results for each field (19), (
20) and candidate characters (21) are displayed. When the first candidate character code (23a) is displayed (19a) as the recognition result for field B, the first candidate character code (25a) is displayed (25a) as the recognition result for field B.
0a), and the candidate character display (21a) of field B also has a candidate character code (25
a), (25b), and (25C) are displayed.

Here, when the second candidate character code (23b) is selected and displayed (19b) as the recognition result for field A, the character code (25d) that has a hierarchical relationship with the east 2 candidate of field A is displayed as the recognition result for field B. The candidate character display for field B (21b) also has character codes (25d) and (25e) that have a hierarchical relationship with the second candidate for field A.
) is displayed.

〔Effect of the invention〕

As described above, according to the present invention, candidate characters with no hierarchical relationship are not displayed, so that it is possible to reduce erroneous corrections when correcting a reading result.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is an explanatory diagram showing the recognition results of fields A and B written in the form sent from the optical reading device of FIG. 1 to the display device. FIG. 3 is an explanatory diagram showing a display screen of the recognition result shown in FIG. 2 on the display device. FIG. 4 is a block diagram showing a conventional device, FIG. 5 is an explanatory diagram showing the recognition results of field 8 and field B written in the form sent from the optical character reading device of FIG. 4 to the display device, and FIG. FIG. 5 is an explanatory diagram showing a display screen of the recognition result shown in FIG. 5 on a display device. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] A scanner scans a form with characters written in predetermined positions and converts the reflected light from the form into an electrical signal. a control device that converts the image pattern into an image pattern including an image pattern and stores it in an image memory; and a recognition device that reads the image pattern of a character stored in the image memory and determines a character code representing the character. and a knowledge processing device that performs knowledge processing in order to improve recognition accuracy by the recognition device, wherein the optical character reading device includes a hierarchical information adding device for adding hierarchical information to the knowledge processing result by the knowledge processing device. An optical character reading device comprising: