JPS648390B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character recognition device, and particularly to a character correction function.

Conventionally, for characters that could not be read in character correction, an image of the character is displayed on a display device and the operator checks it and inputs the answer directly from the keyboard, or a number of candidate characters are displayed and one of them is selected. This has been done by selecting from.

However, in printed character recognition, there may be cases where not all characters on an input form can be read for that character type due to a chip in the matrix of a particular character. Furthermore, in handwritten character recognition, characters of the same character type are often repeatedly refused to be read due to the habits of the scribe. In these cases, the correction work is very time-consuming and troublesome because the same character type has to be corrected many times while looking at the keyboard.

In particular, if multiple character types are frequently rejected due to the above reasons, multiple keys must be pressed alternately, which increases the time required to search for a key and significantly reduces the speed of corrective input.

Furthermore, even if the answer is not included in the candidate characters, you will need to perform the above correction operation again. It can be easily inferred that if the number of character types increases, the efficiency of the current method will become even worse.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned problems in correction input, and it is an object of the present invention to provide a character recognition device that can efficiently perform correction input with simple input operations.

That is, if a character that cannot be read appears at a location where that character has already been registered as a corrected character type, the registration number of that character displayed on the display is entered using the numeric keys;
If the character is a new character that has not been registered, the user directly inputs the answer using the conventional method, adds it to the registered character types, and updates the display. Numeric key input can be done without looking at the key board, so there is no need to spend time and effort searching for keys.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a character correction section of a character recognition device according to the present invention.

The output of the character recognition section, including control information indicating characters that are refused to be read, is passed to the control section 2 and temporarily stored in the reading result memory section 1.

The present invention is intended for correction of reading results, and for batch correction in which a predetermined amount of data such as a plurality of forms is corrected at once. In this case, the control unit 2 displays images of the characters before and after the read-rejected character and the read result character code from the read result memory unit 1 at the time of correction on the display 4. If the reading refusal includes a candidate character, the character is displayed in a blinking manner. In any case, the operator can tell which characters are rejected and what the correct answer is by looking at the display. Figure 2 shows characters that are refused to be read.
An example of what is displayed on a CRT display is shown below. In the figure, "?" indicates a reading refusal pair. Conventionally, corrections were made by the operator looking at the display and inputting the correct character code from the keyboard, or by sequentially displaying candidate characters and specifying the appropriate character.

Therefore, it is necessary to search the surface of the keyboard as described above.

In particular, in the case of English, numerical, written, and katakana CR, there are many character types, so the CR operator cannot memorize the arrangement of all the characters, so the time it takes to scan the board cannot be ignored. In addition, in the case of katakana or symbols, it is necessary to press the shift key, and correction cannot be done with a single touch, so it takes more and more time to correct.

CR's character recognition speed is improving year by year, but
The improvement in reading accuracy is slight. The faster CR recognizes characters, the less time it has for corrections. With the current method, situations occur such as the CR itself stopping while waiting for corrections, or the need to have multiple correction terminals. All of these are labor-saving machines.
This weakens the foundation of CR.

In the present invention, each time a key input of a corrected character is performed, the control unit 2 appends an identification code such as a serial number to the character and stores it in the corrected character registration memory unit 3. Before storing, all corrected characters are checked to ensure that no duplicates are registered. These operations can be easily performed using a microcomputer or microprocessor program commonly used in the arithmetic control section 2.

FIG. 3 shows an example of a corrected character table stored in the corrected character registration memory section. The character code here is JIS code. FIG. 4 is a display example of the improved display unit. In this example, the contents of the corrected character table are displayed as they are at the bottom of the screen. The operator can use the keyboard to make corrections as usual, but if characters that are refused to be read are included at the bottom of the screen, the operator can input the required characters indirectly by hitting the numeric keypad on the keyboard. do. The control unit 2 searches the corrected character table using the input numeric number and writes the character code of the corresponding position into the read result memory unit 1.

FIG. 5 shows an example of the result of reading a program sheet. In this example, the letter "I" appears in six places, the number "5" appears in four places, and the number "φ" appears in four places, all of which are caused by the person's habits. Inputting the program sheet is often done by a CR operator, ie, a programmer, and is not a specialist job such as a key puncher. By providing the corrected character registration memory unit according to the present invention, correction work can be made more efficient.

For example, in the example shown in FIG. 5, it takes 10 seconds to correct the conventional method, and 5 seconds to correct it according to the present invention.

As a modification of the present invention, a light emitting diode 6 or the like is embedded in each key of the keyboard 5 as shown in FIG. It can be replaced by displaying it on the display. The operator who makes the correction is
Keys with light emitting diodes are more noticeable than others, so when repeatedly editing the same character, it is possible to achieve the same effect as when using the CRT display described above. Also, as shown in Figure 4, it may be written in single character units, but it is also acceptable as an idiom made up of multiple character sets. In this case, if the words used are limited, such as in a program, even if there are multiple unreadable characters in the same word, replace the string narrowed with blanks with the specified word. By using methods such as this, it is possible to make corrections more efficiently by inputting corrections only once.

As described above, according to the present invention, by sequentially registering a small number of corrected characters at the time of correction, if the next character to be corrected is already registered, it is only necessary to input its number. The operation is simplified and effective character correction is possible with a simple device.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a character correction unit that corrects read data received from a character recognition unit as an embodiment of the present invention, and Fig. 2 is an example in which read-rejected characters are represented as “?” and displayed on a CRT. Figure 3 shows an example in which the read-rejected characters shown in Figure 2 are registered in the correction character table with a registration number, and Figure 4 shows the characters that are corrected using the registered characters in the correction character table. hand
Figure 5 is a diagram showing an example of displaying on a CRT, Figure 5 is a diagram showing an example of reading an actual program sheet, and Figure 6 is a modification of the present invention in which a light emitting diode is embedded above each key of the keyboard. FIG. 1...Reading result memory section, 2...Control section, 3...Corrected character registration memory section, 4...Display section, 5...Keyboard.

Claims (1)

[Scope of Claims] 1. Means for sequentially registering different character types of corrected characters when collectively correcting characters that have been refused to be read for a predetermined amount of character recognition results; a means for displaying a character type pattern along with identification information; a means for inputting the identification information to perform correction input when correcting a character included in the registered character type displayed by the means; A character recognition device characterized by comprising means for correcting a character that is not included in the character recognition apparatus by inputting a correction input of the corresponding character from a keyboard and adding the character type to the registered character types. 2. The character recognition device according to claim 1, wherein the display of the different character types is performed by emitting light from a light emitting element incorporated in each key of the keyboard. 3. If the characters that are refused to be read are included in a phrase, the means for displaying the phrase is to display the pattern of the phrase containing the different character types with identification information, and the means for inputting corrections is to display the pattern of the phrase that includes the different character types. 2. The character recognition device according to claim 1, wherein the character recognition device is for inputting the identification information when correcting a compound phrase unit.