JPS6364183A - Optical character reading device - Google Patents

Abstract

PURPOSE:To supply an optical character reading device to be able to suitable to the reading of a correcting character by comparing a character accommodated at a memory part with a standard character, identifying the correcting character, displaying it and inputting the correcting data at the result of a collation confirmation. CONSTITUTION:A slip 2 is conveyed to a reading position with a slip conveying mechanism 1, irradiated with a light source 3, and a reflecting light from a character pattern is made incident on a photodetecting element 4, converted to an electric signal, and stored into a memory part 6 as a binary signal with a binary circuit 5. A recognizing processor 7 cuts out the character pattern accommodated once character by character and accommodates the recognizing result into the memory part 6. An editing processor 8 corrects and edits the recognizing result and outputs the result to an input output file 11. A displaying part 9 displays the recognizing result or the input data from an input part 10. When the correcting character is present, the necessity for collation and confirmation is displayed, and when correcting information is inputted by the input part 10, the character is corrected and displayed as corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical character reading device, and particularly to an optical character reading device suitable for reading corrected characters.

[Prior Art] A conventionally known optical character reading device having a function of reading corrected characters is disclosed in Japanese Patent Application Laid-Open No. 60-27083.
As disclosed in the publication, correction information such as a horizontal line that passes through a character square is set in a register, and when this is detected, the character information at the shift position is adopted. It is also possible to read the corrected characters.

[Problems to be Solved by the Invention] However, in the case of handwritten characters, for example, when the number '5ooo' is written as a continuation character, the shape is generally such that the upper ends of three 11011s are connected in a straight line. Even if it is not a letter, if ``3'''' or ``5'' are written all over the character frame, the bottom left edge of the character will appear like a dangling horizontal line,
It may overlap the end of an adjacent character. these are,
Depending on the setting of the correction information, it could be mistaken for a correction character, causing data to be missing. Furthermore,
In cases such as an amount column where correction is not allowed unless a correction stamp is affixed, it is extremely difficult to determine whether there is a correction stamp.

As described above, conventional optical character reading devices lack consideration for measures against misreading and restrictions on form falsification, so there is a problem in that the types of forms to which corrected character reading can be applied are limited. Ta.

The present invention enables
It is an object of the present invention to provide an optical character reading device that can be applied to reading corrected characters that are widely and generally used, such as forms with restrictions on falsification.

[Means for solving the problem] The above problem is solved by the first means of comparing the read character pattern with the standard pattern and identifying the corrected character, and the method of outputting the recognition result to the display unit and displaying it on the form. Second to verify
This problem can be solved by providing means for correcting the recognition result based on the verification result. It is assumed that the reading section is similar to a known optical character reading device.

[Operation] When the character pattern in the storage section is identified as a corrected character by the first means, the second means displays this on the display section,
Make a verification request to the operator. The operator compares the displayed recognition results with the form, and inputs correction data if there is a misidentification. If verification is not performed, an illegally read code such as a question mark may be displayed. When the verification result is input, the editing processor corrects the recognition result in the storage unit based on the verification result.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of an optical character reading device embodying the present invention. In FIG. 1, 1 is a form transport mechanism, 2 is a form, 3 is a light source, 4 is a light receiving element, 5 is a binarization circuit, 6 is a storage unit, 7 is a recognition processor, 8 is an editing processor, and 9 is a display unit , 10 is an input section, and 11 is an input/output cuff file.

The form 2 is transported to a predetermined reading position by the form transport mechanism 1 and is irradiated with light from a light source 3 .

The reflected light from the character pattern on the second side of the form is incident on the light receiving element 4. The light-receiving element 4 is a -dimensional semiconductor CCD sensor or the like, and converts the sequentially incident character patterns into electrical signals, which are input to the binarization circuit 5 . The binarization circuit 5 is
The electric signal is set to ``1'' or 11 by a predetermined threshold value.
It is converted into a binary signal of 0 and II and sent to the storage unit 6. Each of the above means constitutes a reading section. The storage unit 6 stores patterns on the form as binary patterns and also stores recognition results, and uses a semiconductor memory or the like. The recognition processor 7 cuts out the character pattern once stored in the storage section 6 one by one, compares it with a standard pattern, returns the recognition result to the storage section 6, and stores it in a recognition result buffer within the storage section 6. [The collection processor 8 corrects and edits the recognition results stored in the storage unit 6 and outputs the results to the input/output cuff file 11.

The display section 9 displays recognition results or input data from the input section 10 under the control of the editing processor 8, and uses a CRT display or the like. The input unit 10 is also controlled by the editing processor 8 and inputs data for correction and editing, and uses a keyboard or the like. The input/output cuff file 11 is for inputting and outputting recognition results, and uses a floppy disk device or the like.

Figure 2 is the above! FIG. 5 is an explanatory diagram of a read operation in a five-bit processor. As shown on the left side of Figure 2, images P0 and P are placed in predetermined fields #1 and #2 on the second side of the form
When it is input to the storage unit 6 that the images p and P are written, the recognition processor 7 cuts out a character pattern character by character from those images p and P, and compares it with the standard pattern built in the recognition processor 7 itself. After comparison, the recognition results are stored in a buffer in the storage unit 6, as shown on the right side of the second UA.

The recognition result 6a includes flags &J f and f indicating whether each field is a correction letter, and patterns M a z and a indicating the recognition result pattern within the field.
It is made up of. For example, on the second page of the form, "123" is corrected with a horizontal line in the field: tl, and "456
", so in the recognition result 6a, a correction field flag "1" is set in the flag field fyu, and "456" is written in the pattern 41Jal.

On the other hand, since "5ooo" is uncorrected in field #2, O11 is set in the flag field f, and the pattern [a t
remains at “5000”.

FIG. 3 is an explanatory diagram of the operation of confirming corrected characters in the editing processor. FIG. 3(a) shows the recognition processor 7
Indicates the contents of the recognition result buffer 6a input by
When the editing processor 8 detects that the flag fields f1 and f are "1", it displays the contents of the patterns 1% ila yu and a on the display section 9, and verifies (verifies)
It also shows what is required. The upper pattern Da is an example that has been corrected using correction information (horizontal lines, etc.), and the pattern aaffi on the Do side is an example where it is misread as a corrected character and the lower three digits are treated as missing. When verification is requested on the display screen, the operator displays the form and the results of the display screen.
; (If correction is necessary, enter the required data manually from the input unit IO, correct the contents on the display screen, and then press the Verify End key.

Note that in this embodiment, the verification is performed using m i+! Although the comparison is determined to be carried out, it is also possible to directly transfer the binarized pattern of the form corresponding to the read field from the storage section 6 to the display section 9 and perform the comparison on the screen.

Naturally, it is O■ Noh.

When the recognition processor 8 detects the end of verification, the recognition processor 8 performs the verification based on the data input from the input unit 10.

Detect recognition results. For example, the upper pattern column a8 in FIG. 3(a) has been corrected, so it remains "456", and the lower pattern 11la! contains missing data, so as shown in Figure 3(b), ′″s o
o o” is input as the verification result, and Hz2
The contents of the result buffer are corrected. Furthermore, when the completion of verification is confirmed, the flags f and f are also set to I.
Reset to IO11.

Then, these recognition results are the status flags f and f,
are stored in the input/output cuff aisle 11.

FIG. 4 is a diagram showing an example of a method of displaying a recognition result as an illegal reading result. Instead of displaying a verification request on the display screen, a message indicating that the recognition result is an illegal reading result is displayed at the display part of patterns mal and at. As a code, a question mark “?”
This outputs the following.

When verification is executed, this code "?" is replaced with an appropriate number or character.

As described above, according to the present embodiment, by executing the verification of the corrected characters, it is possible to correct data loss or misreading due to a misjudgment of the corrected characters, and it is possible to read the corrected characters with high reliability. . Furthermore, since it is possible to output whether or not the verification has been completed together with the recognition result, it is possible to perform the verification of the corrected characters in another device, and furthermore, it is possible to process the verification all at once.

Further, according to this embodiment, even in the case of an amount field where correction is not allowed unless a correction mark is affixed, an appropriate input can be made by the verification process.

In this embodiment, it is assumed that all corrected characters are verified immediately, but the necessity of verification is specified by J&, data, etc., and if verification is not required, the corrected characters are read without being executed. You can do it like this. It goes without saying that the determination as to whether or not to output the illegal reading result can also be specified in the same way.

[Effects of the Invention] As explained above, the present invention can be applied to reading corrected characters that are widely used in documents that are subject to falsification without impairing the reliability of read data. An excellent optical character reading device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 21 to 4 are explanatory diagrams of the recognition operation of the present invention. l... Form transport mechanism, 2... Form, 3 - Light source, 4
... Light receiving element, 5... Binarization circuit, '6... Storage section,
7... Recognition processor, 8... Editing processor, 9
...Display section. lO...input section, 11...input/output cuff aisle, all
a, . . . Pa9-”, i'fJ, fl, f, = 7 lag field, Pl, P, -- . . . image field.

Claims (1)

[Scope of Claims] 1. A reading section that reads character patterns on a form surface, a storage section that stores the read character patterns, a display section that displays the contents of the storage section, and correction data for the displayed contents. an optical character reading device comprising an input section for inputting data, a first means for comparing a character pattern stored in a storage section with a standard pattern and identifying a corrected character, and transmitting the recognition result from the storage section to a display section; An optical character reading device comprising: second means for outputting and requesting verification of a form; and third means for inputting correction data based on the verification result. 2. The optical character reading device according to claim 1, wherein if verification is not performed even though the recognition result is a corrected character, the character pattern is displayed as an illegally read code.