JPH0644405A - OCR reading position correction controller - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to an OCR reading position correction control device for an OCR recognition device that optically reads characters, and provides an OCR reading position correction control device that can improve the recognition rate of handwritten characters. With the goal. It is characterized in that a reading position searching unit 13 for searching a written state of a handwritten character is provided, the search information is compared with registered reading position information, and character recognition is performed by the corrected data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an OCR reading position correction control device for an OCR recognition device for optically reading characters, and more particularly to an OCR reading position correction control device capable of improving character recognition accuracy while simplifying work. Regarding

The OCR recognition apparatus of the present invention recognizes a handwritten character and converts it into corresponding electronic character information. For example, the characters and numbers of a form manually input by a user with a writing tool are appropriately read and converted into electronic information or printed out on a printer.

[0003]

2. Description of the Related Art In recent years, OCR recognition devices have become widespread, and their fields of use are also expanding. Many measures are being studied to improve the character recognition rate in such an OCR recognition device. However, satisfactory results have not always been obtained depending on the paper condition and writing condition of the forms.

As one of such measures, a device for standardizing the medium to be read and standardizing the character writing state as much as possible has been devised. For example, prepare a form with a description frame printed on it and OCR the letters and numbers described in the description frame.
To recognize.

In such a case, the position of the character description frame is registered in the recognition device in accordance with the type of the form, and the character described in this description frame is read.

Therefore, when the descriptive character is out of the descriptive frame, the character cannot be recognized as it is. Therefore, when the optical character is read as it is,
The recognition rate is significantly reduced. Such a situation also occurs when, for example, printing and cutting of forms are not performed accurately.

In the case of the form described in the improper position as described above, when the operator judges in advance that the form cannot be recognized or the reading by the device fails, the form is marked with a reference mark and the form is added. It was handled such that the reading operation was performed again while comparing the registered position and the reference mark.

In such an operation, it is necessary for the operator to visually inspect the handwritten form in advance and attach necessary reference marks. Therefore, much labor and time were required.

FIG. 4 shows a principle configuration for character recognition of a handwritten form in which the description position is inappropriate in the prior art. The part surrounded by the broken line frame in the figure is a non-automated part performed by the operator. The position of the character description frame of the form is registered in the OCR reading device.

A reference mark is attached to the form 1 described in the improper position, and this reference mark is read by the OCR reading control unit 2. The reference mark detection unit 3 detects a reference mark attached in advance.

The reading position correction unit 4 compares the reference mark detected in this way with the preliminarily registered description frame position to determine the correction state. Based on the correction state determined in this way, the character recognition unit 5 recognizes the handwritten character.

In such an operation, it is necessary to visually judge whether the description position is suitable or not, and to add an additional reference mark if it is found to be inappropriate. In order to improve the recognition rate, it was necessary to perform the inspection more accurately, and there was an inevitable disadvantage in terms of labor and time. In addition, the reference mark may adversely affect reading, which has been regarded as a problem.

[0013]

SUMMARY OF THE INVENTION The present invention solves the drawbacks of the prior art, automatically searches the description position of a character, and can improve the character recognition rate based on the search result, which is an OCR reading position correction control. An object is to provide a device.

[0014]

FIG. 1 is a block diagram showing a principle configuration of an OCR reading position correction control system according to the present invention, in which reference numeral 11 is a handwritten form and character numbers to be recognized are described. Has been done.

Reference numeral 12 is an OCR reading control unit, which reads the description content of the handwritten form 11 according to a predetermined procedure. Reference numeral 13 is a reading position search unit, which searches for a reading position based on the minimum line position and minimum digit position of the descriptive character.

Reference numeral 14 is a reading position correction unit, which performs necessary reading position correction based on position information registered in advance in the apparatus and information obtained by searching for characters actually described.

Reference numeral 15 is a character recognition unit, which recognizes characters while making necessary corrections based on previously obtained reading position correction information. As a result, characters are recognized with a high recognition rate.

[0018]

According to the OCR reading position correction control device of the present invention, the line digit of the descriptive character is searched prior to character recognition. The characters are recognized while making necessary corrections based on the search results. As a result, the handwritten character can be recognized with a high recognition rate without extra labor.

As a result, the preparatory work before reading, which takes a lot of time and labor, becomes unnecessary, and labor saving is achieved.

[0020]

FIG. 2 discloses the function of each part of the configuration in FIG. 1, and the same elements are designated by the same reference numerals to clarify the relationship between the two figures. Handwritten form 11 of figure
It is assumed that the handwritten character strings of "Kanagawa" and "Fujisawa" are described in. The upper character string "Kanagawa" is described in the description frame, but the character string "Fujisawa" is partly outside the description frame. If it is read as it is, it will be recognized only in the description frame, and an incorrect reading result like "Fusinano" will result.

When the OCR reading control unit 12 performs the reading, R of the form format is registered. A pattern 16 in which the character pattern of the handwritten form 11 is superimposed on the registered form is obtained.

On the basis of the state in which the character patterns are superposed in this way, the reading position searching unit 13 searches for the character description position. The reading position correction unit 14 performs correction based on the first row and first digit of the pattern 17.
As a result, like the pattern 18, the character string "Kanagawa"
Of course, the character string "Fujisawa" is also corrected so as to be located within the reading frame.

By recognizing the pattern 18 corrected in this way by the character recognition unit 15, the expected character strings “Kanagawa” and “Fujisawa” are recognized as indicated by reference numeral 18.

FIG. 3 shows the operation concept of the reading position searching section. A character pattern is read from the handwritten form 11 and is superimposed on the line digit position determination frame 20. Although the character pattern and the line digit position determination frame at this time are both electronic data, they are visually illustrated.

When the character pattern is superimposed on the line digit judgment frame 20, the minimum row position and the minimum digit position of the character pattern string in the line digit position judgment frame 20 are detected. Therefore, electronic correction may be added to the character pattern string so that the minimum row and the minimum digit fit within the description frame of the registered data that is held in advance.

As a result, as shown in the pattern 18 of FIG.
The character pattern enters the readable frame, and the character string can be easily recognized.

[0027]

According to the present invention, an inappropriate handwritten character of a character string caused by a writer's habit, a defective form sheet, or the like is optically read automatically and with a high recognition rate, and converted into electronic information. It becomes possible to do. The labor and time for the operator to check in advance are saved, and the improvement of office efficiency is achieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic principle of an OCR reading position correction control device according to the present invention.

FIG. 2 is an explanatory diagram showing an operation of an embodiment of the OCR reading position correction control device according to the present invention.

FIG. 3 is a conceptual explanatory diagram of reading position retrieval of the OCR reading position correction control device according to the present invention.

FIG. 4 is a block diagram showing a configuration of an OCR reading position correction control device according to a conventional technique.

[Explanation of symbols]

 11 handwritten form 12 OCR reading control unit 13 reading position search unit 14 reading position correction unit 15 character recognition unit 20 line digit position judgment frame

Claims (2)

[Claims] 1. An OCR of a control device for recognizing handwritten characters
In the reading position correction control device, an OCR reading control unit for recognizing handwritten characters by the optical character reading device
(12), a reading position search unit (13) for searching the state of handwritten characters, and a necessary correction by comparing the state of the character read by the reading position search unit (13) with the registration information of the reading position. OCR reading, which comprises a reading position correction unit (14) for performing the above, and a character recognition unit (15) for judging the recognition data corrected by the reading position correction control unit (14) as a character. Position correction control device. 2. The OCR reading position according to claim 1, wherein the reading position searching unit (13) searches the reading position by superimposing a previously registered line digit position determination frame and a read character pattern. Correction control device.