JPS61150081A - Character recognizing device - Google Patents

Abstract

PURPOSE:To facilitate the correction of erroneously recognized KANJI (Chinese character) by recognizing a hand-written character by an input pen based on coordinate data corresponding to a position to which the input pen touches and correcting the recognized result corresponding to the coordinate data. CONSTITUTION:When the input pen 19 touches a position corresponding to the screen of a CRT display part 13, a transparent tablet 14 converts the hand- written character into an electrical signal corresponding to a touched position coordinates, while a tablet control part 15 converts it into coordinate data. According to the coordinate data outputted from the tablet control part 15, an on-line recognition control part 16 outputs the hand-written character by the input pen 19 and outputs a character code being the recognized result to a control part 17. It executes the control of the overall device, and corrects the character, which a recognizing part 11 recognizes erroneously or rejects, according to the character code outputted from the on-line recognition control part 16.

Description

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

[Technical background of the invention and its problems] In recent years, optical character reading devices (OCR) that can read handwritten Chinese characters have been developed. By using such Kanji OCR, character data including Kanji characters recorded on a form can be input into a computer or the like at high speed.

By the way, in Kanji OCR, erroneous recognition and rejection of input characters may occur, so correction processing is required. Conventionally, a method has been used in which an operator inputs correction characters from a keyboard.

However, with the correction method described above, it is easy for alphanumeric characters and kana characters, but for kanji, the kana character corresponding to the on/kun reading is entered from the keyboard and selected from the candidate characters that have been converted to on/kun. I will do it. in this case,
The candidate characters are displayed on the screen of a CRT display device. There is also a method of inputting the kanji code corresponding to the kanji for correction from the keyboard. Therefore, in either method, the correction process is troublesome and there is a problem that the efficiency of input operations is deteriorated.

[Object of the Invention] An object of the present invention is to provide a character recognition device that can correct the misrecognition or rejection of Chinese characters with a simple input operation.

[Summary of the Invention] In the present invention, a tablet input section is provided that outputs coordinate data corresponding to the touch position when an input pen touches a position corresponding to the screen of the display section. The character recognition result output from the optical character recognition section is displayed on the display section. Based on the coordinate data output from the tablet input section, the online recognition control section recognizes handwritten characters written with an input pen. Based on the modified recognition result output from the online recognition control section, the modification control section is configured to modify the H ml result displayed on the screen of the display section corresponding to the touch position by the input pen.

With this configuration, the operator can easily correct erroneously recognized or rejected Chinese characters by simply inputting correction characters by hand from the tablet input section using an input pen.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing the configuration of a character recognition device according to an embodiment. In FIG. 1, a recognition unit 11 optically scans characters such as Chinese characters recorded on a form and executes recognition processing. The display control unit 12 displays the character recognition results and the form image output from the recognition unit 11 on the screen of the CR7 display unit 13. The transparent tablet 14 is
In close contact with the screen of the CR7 display section 13, an electrical signal corresponding to the coordinate position specified by the input pen 19 is output to the tablet control section 15. The tablet control unit 15 converts the electrical signal output from the transparent tablet 14 into coordinate data that is a digital signal.

The online recognition control unit 16 recognizes handwritten characters written by the input pen 19 based on the coordinate data (or coordinate data series) output from the tablet control unit 15 and sends the character code that is the recognition result to the control unit 17. Output. Control part 1
7 executes control of the entire device and controls the recognition unit 11 based on the character code output from the online recognition control unit 16.
Processing is performed to correct characters that are misrecognized or rejected. The console keyboard 18 is an input device that outputs commands, data, etc. manually entered by an operator to the control unit 17.

In the character recognition device having such a configuration, the operation of this embodiment will be explained. First, the recognition unit 11 optically scans the form and converts characters such as Chinese characters recorded on the form into electrical signals. After this electrical signal is A/D converted into a digital signal, it is output to the character recognition section of the recognition section 11 as character pattern data. This character recognition unit outputs candidate character codes obtained after the inspection process, feature extraction process, and identification process to the control unit 17. The control unit 17 determines and outputs the final recognition result from the candidate character code output from the recognition unit 11.

Here, the control unit 17 controls the display control unit 12 in the instant correction mode or when there is a reject character on the form.
The character recognition results and form image stored in the recognition unit 11 are transferred to the recognition unit 11. The immediate correction mode is a mode in which the operator corrects misrecognized or rejected characters, and is instructed by the operator from the console keyboard 18, for example. As shown in FIG. 2, the display control section 12 causes the document image 20 and the recognition result 21 to be displayed on the screen of the CR7 display section 13 in an overlapping manner. At this time, the display control unit 12 writes an image 21 in which the text entry frame is blank from the form image into the built-in bitmap memory. Thereafter, the recognition result 21 including the erroneous recognition result 23 and the symbol 24 indicating rejection is written to the corresponding address of the bitmap memory in accordance with the size of the image 21 of the entry frame. The recognition result 21 is obtained by the recognition unit 11
The character pattern of the first candidate character is generated from a built-in character generator.

Next, the operation of correction processing for misrecognition and rejection based on the display results of the CR7 display unit 13 will be explained. First, when performing a reject correction, the operator searches for a reject display 24 on the CR7 display section 13 and inputs a reject correction command from the console keyboard 18.

Thereby, the control unit 17 performs special photography until the operator inputs the position of the character to be corrected from the transparent tablet 14.

The operator uses the input pen 19 to input the CR7 display section 1.
Transparent tablet 14 corresponding to the reject display 24 of No. 3
Touch input at the top position. In response to this input, coordinate data for the contact position of the input pen 19 is transferred from the transparent tablet 14 to the online recognition control unit 16 via the tablet control unit 15. In this reject correction mode, the online recognition control section 16 outputs the coordinate data as is to the control section 17. The control unit 17 detects the position of the paste character within the entry frame 20 of the form based on the supplied coordinate data. Further, the control unit 17 controls the display control unit 12 to output a character image on the form to the display area corresponding to the rejected character. At the same time, the online recognition control section 16 is switched to recognition mode.

When the image of the reject character is displayed on the screen of the CR7 display unit 13, the operator places the input pen 1 on the transparent tablet 14 corresponding to the position within the specified character entry frame.
Use one to fill in the correct letter. Furthermore, the operator inputs entry commands from the console keyboard 18. Upon receiving the coordinate data sent from the transparent tablet 14 via the tablet control unit 15, the online, two-consciousness control unit 16 extracts features for the coordinate data.
Execute recognition processing. A candidate character code obtained as a result of this recognition process is output to the control section 11. The control unit 17 controls the display control unit 12 to display the character pattern of the candidate character code from the online recognition control unit 16 on the CR7 display unit 13. Operator is CR7
Check the candidate character pattern displayed on the display unit 13,
If it is correct, execute the correction process for the next letter.

If the candidate character pattern is incorrect, the next online candidate command is input from the console keyboard 18. In response to this input, the control unit 17 outputs the next ranked candidate character code from the online recognition control unit 16 to the display control unit 12, and in the same manner as above, C
It is displayed on the R7 display section 13. Note that if the correct answer is not included in the candidate characters output from the online recognition control unit 16, the same position is again corrected.

Next, in the misrecognition correction process, the operator needs to compare the characters on the form with the character pattern displayed on the CR7 display section 13. Therefore, for example, the operator inputs a form ejection command from the console keyboard 18 to cause the recognition unit 11 to eject the form. The operator compares the characters on the form with the characters on the screen of the CR7 display section 13, and if the operator determines that there is a misrecognition, the console keyboard 18
Enter the error correction command from . After this, the operator selects the transparent tablet 1 corresponding to the display position of the misrecognized character.
A touch input is made to the area 4 using the input pen 19.

In response to this input, the control unit 17 causes the display control unit 12 to display the incorrectly recognized character 23 in reverse video or blink it.
control. After confirming the correction target character 23 on the screen of the CR7 display unit 13, the operator inputs the OCR next candidate command from the console keyboard 18. In response to this command, the control section 17 reads out the recognition result of the next rank from the buffer memory of the recognition section 11, transfers it to the display control section 12, and displays it on the CR7 display section 13. If there is a correct answer among the candidate characters displayed on the CR7 display section 13, the operator selects that character on the console keyboard 18.
Specify from. If there is no correct answer, the operator further inputs a command from the console keyboard 18 requesting the display of the next candidate character.

Here, if there is no correct answer among the candidate characters from the recognition unit 11, the operator selects the specified position on the transparent tablet 14 (CR7
Enter the correct characters in the character entry frame displayed on the display section 13 using the input pen 19. This handwritten character by the operator is used as coordinate data by the online recognition control unit 16.
and is recognized by the online recognition control unit 16. The control unit 17 causes the character pattern that is the recognition result from the online recognition control unit 16 to be displayed on the screen of the CR7 display unit 13. Thereby, the operator confirms the corrected characters on the CR7 display section 13.

In this way, the operator can input corrected characters for characters rejected or incorrectly recognized by the recognition unit 11 by inputting them from the transparent tablet 14 using the input pen 19. In this case, the operator
While checking the recognition result displayed on the R7 display section 13,
Since it is possible to directly make corrections via the transparent tablet 14, the correction process is extremely simple. In particular, when correcting the i1 recognition result of a kanji character, the correction input operation becomes easy because the conventional work of checking the kanji code can be omitted. The recognition result including the characters corrected in this way is finally output from the control unit 17.

[Effects of the Invention] As detailed above, according to the present invention, when erroneous recognition or rejection of kanji occurs in OCR,
The operator can perform correction processing with simple input operations. Therefore, as a result, the efficiency of input operations of the character recognition device can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of a character recognition device according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of display on a CRT display section of the same embodiment. 11... Recognition unit, 12... Display control unit, 1
3... CRT display section, 14... Transparent tablet, 1
5... Tablet control unit, 16... Online recognition control unit, 17... Control unit, 18... Console keyboard, 19... Input pen.

Claims (1)

[Claims] An optical character recognition unit that optically scans and recognizes characters recorded on a form, a display unit that displays the character recognition results output from this optical character recognition unit, and a screen compatible with this display unit. a tablet input unit that outputs coordinate data corresponding to the contact position coordinates when the input pen touches a position to be touched; and an online system that recognizes handwritten characters written by the input pen based on the coordinate data output from the tablet input unit. a recognition control section; and a character correction means for correcting the recognition result displayed on the screen of the display section corresponding to the contact position by the input pen based on the corrected recognition result output from the online recognition control section. A character recognition device comprising: