JPH0427591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character reading/correcting device that corrects character categories read by a character reading device through operator intervention.

Conventionally, devices for optically reading printed or handwritten characters (hereinafter referred to as OCR) have already been put into practical use for alphanumeric characters and katakana.

Recently, it has become possible at the research level to read handwritten kanji.

As described above, when the objects to be read are expanded to include handwritten Chinese characters, it becomes difficult to obtain sufficient recognition accuracy due to the increase in the number of characters to be read and the complexity of the character shapes. Therefore, it is necessary to correct the results read by OCR.

Traditional correction methods only target unreadable characters that occur in OCR.

In addition, in order to reduce the number of incorrect readings that occur with OCR, a method is used in which multiple candidate characters are output depending on the recognition accuracy of OCR, and the operator selects the correct character from the multiple output candidate characters. Ta. However, in any case, if the correct character category is not included in the OCR reading result, it takes time to correct the characters, and the overall processing capacity of the OCR system decreases.

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional scribe.
By memorizing reading trends in OCR,
The object of the present invention is to provide a character reading/correcting device which solves the above problems and improves the overall OCR processing ability.

Another object of the present invention is to have a certain tendency in OCR character reading depending on each scribe when targeting characters written in sentences in addition to characters on a form. The object of the present invention is to provide a character reading/correcting device which focuses on this and improves the overall OCR processing ability.

According to the present invention, in a character reading correction device that corrects a character category read by a character reading device that reads characters on a sheet of paper through operator intervention, the character category read incorrectly by the character reading device ( By correcting the character category (hereinafter referred to as the misread character category) through the operator and pressing the first key in which the corrected character category (hereinafter referred to as the corrected character category) and the misread character category are set in advance, the error list is displayed. a means for registering in a storage memory;
By pressing a second key set in advance, a corrected character category corresponding to the misread character category generated by the character reading device is detected from the error list storage memory, and the detected corrected character categories are sequentially displayed. According to the present invention, there is obtained a character reading correction device having a candidate character detection means for detecting a candidate character, and a means for performing reading correction using a correction character category detected by the candidate character detection means.

A specific embodiment of the present invention will be explained below using a logic block diagram. In the figure, 1 is
It is OCR. Reference numeral 2 denotes a read character storage buffer that stores character categories read by OCR1. It is assumed that the read character storage buffer 2 stores the read results for input character images of a plurality of lines. 3 is a recognition control device. As the recognition control device 3, it is appropriate to use an ordinary microcomputer.

When the character categories read by the OCR 1 are sequentially transferred to the read character storage buffer 2, the recognition control device 3 sequentially reads out the character categories from the read character storage buffer 2, and the display control device 4 corresponds to the character categories. A character pattern is generated, sequentially transferred to the display device 5, and displayed. still,
In displaying the character categories read by the OCR 1, it is also possible to simultaneously display input character images corresponding to the reading results from a pattern memory (not shown) built into the OCR 1.

6 is a keyboard. On the keyboard 6, special codes are assigned in advance to four appropriate keys, which are a misread character registration key 61, a candidate character detection key 62, a correction key 63, and a confirmation key 64.

Although a keyboard is used in the figure, an input device such as a tablet may also be used.

7 is a code conversion circuit. The code conversion circuit 7 detects whether or not a misread character registration key 61, a candidate character detection key 62, a correction key 63, and a confirmation key 64 on the keyboard 6 are pressed.

That is, the code conversion circuit 7 converts the misread character registration key 6
When the code indicating the key press 1 is input, a registration command signal (not shown in the figure) is output to the recognition control device 3, and when the code indicating the press of the candidate character detection key 13 is input, the candidate character detection command signal is output. (not shown in the figure) is output to the recognition control device 3, and when a code indicating the keystroke of the correction key 63 is input, a correction command signal (not shown in the figure) is output to the recognition control device 3, and the keystroke of the confirmation key 64 is input. When the code indicating , is input, a confirmation command signal (not shown) is output to the recognition control device 3 .

Therefore, when the operator checks the reading results on the display device 5 and corrects the misread characters, the present invention uses an error list storage memory 8 that stores the scribe's reading tendency based on the OCR 1.

That is, the error list storage memory 8 stores character categories that have been misread as a result of reading by OCR 1 and corrected character categories.

To register the misread character category and corrected character category in the error list storage memory 8, as described above, by pressing the misread character registration key 61 on the keyboard 6, a registration command signal is sent to the recognition control device 3. The misread character category stored in the read character storage buffer 2 by the recognition control device 3 and the corrected character category corrected by the operator are registered in the error storage memory 8. Incidentally, the misread character category and the corrected character category may be registered in the error list storage memory 8 in advance using test data.

Next, a method for the operator to use the error list storage memory 8 to correct misread character categories will be explained. When the operator checks the reading results on the display screen and finds a misread character category, he uses the keyboard 6 to move the cursor to the misread character category position. Next, when the operator presses the candidate character detection key 62 on the keyboard 6, the code conversion circuit 6
As described above, the candidate character detection command signal is transferred to the recognition control device 3. When the candidate character detection command signal is input, the recognition control device 3 searches the error storage memory 8 for a corrected character category corresponding to the misread character category indicated by the cursor position on the display screen, and selects the corrected character category obtained from the error storage memory 8. are sequentially displayed on the display screen of the display device 5 via the display control device 4. If the operator has a correct answer in the corrected character category displayed on the display screen, by pressing the correction key 63 on the keyboard 6, a correction command signal is transferred to the recognition control device 3, and the recognition control device 3, the misread character category on the display screen is replaced with the corrected character category.

When the correction of the reading result on the display screen is completed and the operator presses the confirmation key 64 on the keyboard 6, the reading result on the display screen is saved in the external storage device 9.
is transferred and stored.

Although the function of the code conversion circuit 7 in the figure has been explained as being separate from the recognition control device 3, it can also be incorporated into the recognition control device 3.

As described above, the present invention allows scribes to
By using reading trends in OCR,
It is now possible to improve OCR recognition accuracy,
Overall OCR processing power is improved.

[Brief explanation of drawings]

The figure is a logic block diagram showing one embodiment of the present invention. In the figure, 1 is an OCR, 2 is a reading character storage buffer, 3 is a recognition control device, 4 is a display control device,
5 is a display device, 6 is a keyboard, 7 is a code conversion circuit, 8
9 is an error list storage memory, and 9 is an external storage device.

Claims (1)

[Claims] 1. In a character reading correction device that corrects character categories read by a character reading device that reads characters on paper through the intervention of an operator, character categories that are incorrectly read by the character reading device (hereinafter referred to as misread characters) (hereinafter referred to as "corrected character category") is corrected by the operator, and by pressing a first key in which the corrected character category (hereinafter referred to as "corrected character category") and the misread character category are set in advance,
means for registering in an error list storage memory, and by pressing a preset second key, the corrected character corresponding to the misread character category generated by the character reading device from the error list storage memory; Candidate character detection means for detecting a category and sequentially displaying the detected corrected character categories, and means for performing reading correction using the corrected character categories detected by the candidate character detection means. Characteristic character reading correction device.