JPH0584933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a character recognition system that includes a character recognition device and a host computer and displays recognition results on a display device.

(b) Prior art JP-A-60-238986 and JP-A-61-74080
As disclosed in the above publication, conventional character recognition systems have been configured by connecting a character recognition device and a host computer equipped with a display device.

On the character recognition device side, the input character is recognized by extracting a feature pattern from the character pattern of the input character and comparing the extracted feature pattern with a pre-stored standard pattern. Candidate characters were selected. Then, the character code corresponding to this candidate character is read from the code memory, and this character code is sent to the host side. The host side is equipped with a character generator that converts character codes into character patterns and a display device.The character generator converts character codes transferred from the character recognition device into character patterns, and this character pattern is used as a recognition result. was displayed on the display device.

(C) Problems to be Solved by the Invention Generally, the code memory in a character recognition device or the character generator in a host computer stores character codes or character patterns based on a character code table such as a JIS code table. However, there are currently two JIS code tables: a new and an old code table. For example, the character code for the new font "Hinoki" is "4116" in the new JIS code table, but "5956" in the old JIS code table.
The character code for the old font "Hinoki" is the new one.
It is "5956" in the JIS code table, and "4116" in the old JIS code table. In other words, in these two old and new code tables, for some characters, the character codes of the new font and the character codes of the old font are swapped.

Therefore, if the character generator on the host side is based on the old JIS code table and the code memory on the character recognition device side is based on the new JIS code table, the recognition results on the character recognition device side,
Even if you select "Hinoki" as a candidate character, "4116" is output as the character code, and this character code is converted to the character pattern "Hinoki" on the host side, so the display device cannot input it. As a result of recognition of the character "Hinoki", a problem arises in that the incorrect "Hinoki" is displayed on the front.

In addition, in the host computer, the character generator is not necessarily based on the JIS code table, but may be based on a code table specific to the manufacturer, and in such cases, the code memory of the character recognition device may not be based on the JIS code table. If this is the case, problems similar to those described above will occur.

(d) Means for solving the problem The present invention causes the host computer to send code table information indicating which of a plurality of character code tables the internal character generator is based on before recognition, The character recognition device side stores a plurality of character codes based on a plurality of character code tables in a code memory, and also stores character codes corresponding to the candidate characters in the character code table according to the code table information from the code memory. The above problem is solved by reading and outputting the data.

(E) Effect In the present invention, the character generator on the host side informs the character recognition device which character code table is based on as code table information, and the character recognition device side recognizes characters according to this code table information. Since the character code of the candidate character selected by recognition is read out from among the character codes of the code table, the correct character pattern of the candidate character selected by recognition is always displayed on the display means.

(F) Embodiment FIG. 1 is a block diagram showing an embodiment of a character recognition system according to the present invention, in which 1 is a character recognition device, and 2 is a host computer such as a word processor.

The character recognition device 1 includes a character observation unit 4 that scans and photoelectrically converts input manuscript paper 3 to obtain an input character pattern, a dictionary unit 5 that stores standard patterns of each character in a predetermined order, and stores character codes. The code memory 6 includes a code memory 6 for storing character codes, a recognition unit 7, a candidate memory 8 for storing character codes of a plurality of candidate characters for one input character, and a control unit 9.
For each character whose standard pattern is stored in the dictionary section 5, each character code based on the new JIS code table is stored in the first part stored in the same order as the standard pattern.
It consists of a code memory 10 and a candidate code memory 11 in which new JIS codes and old JIS codes are stored in correspondence only for characters whose correspondences between characters and character codes are different in the new JIS code table and the old JIS code table.

On the other hand, the host computer 2 uses the keyboard 1
2. A control unit 13, a display 14, a screen memory 15 corresponding to the screen for storing character codes, a character generator 16, and a code table information CD indicating which character code table the character generator 16 is based on. It is provided with a memory 19 for storing character patterns, and the character patterns of this character generator 16 are stored based on the old JIS code table. The memory 19 stores "1" as the code table information CD when the character generator 16 is based on the old JIS code table, and "0" when it is based on the new JIS code table. In this case,
Memorize "1".

Therefore, in order to start recognition, first, when the recognition key 20 of the keyboard 12 is pressed, the recognition command and the code table information CD stored in the memory 19 are pressed.
is sent from the host computer 2 to the character recognition device 1, and the control unit 9 determines that the code table information CD is "0".
If so, turn off the flag FR, if it is "1", turn off the flag
At the same time as turning on the FR, the character observation unit 4 is made ready for inputting according to the recognition command. Therefore, if the manuscript paper 3 is input in this state, the character observation section 4
operates, and the character pattern of the input characters is output to the recognition unit 7. The recognition unit 7 extracts a feature pattern from the input character pattern, and compares this feature pattern with a standard pattern to identify the five most similar patterns, from 1st to 5th, for each input character. Select candidate characters. Then, each character code corresponding to the first to fifth candidate characters is read from the first code memory 10 and stored in the storage areas 81a to 81e of the candidate memory 8 in order.

Therefore, the candidate memory 8 stores new JIS characters for the first to fifth candidate characters selected by recognition.
Character codes based on the code table will be stored.

After that, the control unit 9 determines whether the flag FR is on or off, and if the flag FR is off, it finishes selecting the character code for the first input character,
The character code for the first candidate character stored in the storage area 81a is output as is to the host side. However, as in this example, the flag FR
When it is on, the character code stored in the storage areas 81a to 81e is read, and this character code is stored in the auxiliary code memory 11.
If the code matches, the corresponding old JIS code is read out, and the old JIS code is replaced with the new JIS code, and storage areas 81a to 8
1e, respectively. If they do not match, the character code is the same in both the old and new code tables, so it is stored as is.
In this way, when the selection of the character code for the first input character is completed, the host side selects the character code for the first candidate character stored in the storage area 81a, as in the case where the flag FR is off. Transfer to.

The candidate memory 8 has five storage areas for all input characters, such as storage areas 82a to 82e for the second input character, and the recognition unit 7 and control unit 9 The same processing as described above is performed for each input character.

That is, the candidate memory 8 stores the character codes of candidate characters in the code table according to the code table information.

On the host side, the control unit 13 sequentially stores the transferred character codes in the screen memory 15.
The character generator 16 converts this character code into a character pattern based on the old JIS code table,
This character pattern is displayed on the display screen as a recognition result, but in this case, the character code output by the character recognition device 1 is based on the old JIS code table as described above, so the display screen shows candidate characters. The correct character pattern corresponding to is displayed.

For example, if the second input character is "Hinoki" and the first candidate character selected by recognition is the same "Hinoki", the first new JIS code "4116" is stored in the storage area 82a. is stored, but is changed to the corresponding old JIS code "5956" using the auxiliary code memory 11. Therefore, in the character generator 16 based on the old JIS code table, the code "5956" is changed to the character pattern "Hinoki". ” and this correct character pattern is displayed as the recognition result.

Note that even when the correction key 17 or the next candidate key 20 is pressed, the correct character pattern is output as the second and subsequent candidate character patterns.

By the way, in this embodiment, the auxiliary code memory 1
1, we used a new JIS code that corresponds to the old JIS code, but in cases where standard patterns and character codes are managed using character numbers, as in JP-A-60-238986, it can be used as an auxiliary code memory. ,
Using the correspondence between letter numbers and old JIS codes,
It is determined whether the character number selected by recognition matches the character number stored in this auxiliary code memory, and if it matches, the old JIS code is output, and if it does not match, it is output to the first code memory 10. It is also possible to output the same JIS code for the old and new versions.

The embodiment described above is an example in which the present invention is applied to a code table in which the correspondence between characters and character codes differs only for some characters, such as the old and new JIS code tables. The present invention is also applicable when using a manufacturer-specific code table that is completely different from the JIS code table.

That is, FIG. 2 is a block diagram showing another embodiment of the present invention, in which the code memory 6 stores character codes based on the JIS code table for all characters in the same order as the standard pattern. 1 code memory 21 and a 2nd code memory 2 that stores character codes for all characters based on a unique code table different from the JIS code in the same order as the standard pattern.
2, and the character recognition device 1 further includes a flag
It has a selection section 23 that selects either one of the first and second code memories 21 and 22 depending on the on/off state of the FR.

In this case, the character generator 16 is stored in the memory 19 on the host side as a code table information CD.
If the code is based on the JIS code table, "0" is stored, and if it is based on a specific code table, "1" is stored.Same as the previous embodiment, when the recognition key 20 is pressed, the character recognition device 1 side is stored. The control unit 9 turns the flag on or off depending on the content. Then, depending on the flag, the selection unit 23 selects the first code memory 21 if it is off, and selects the second code memory 22 if it is on. Therefore, in the recognition unit 7, if the code table information CD is "0" as the character code of the candidate character selected by recognition, the character code based on the JIS code table is selected, and the code table information CD is "1". If so, character codes based on the specific code table are selected and these character codes are stored in the candidate memory 8. And the control section 9
sends the character code of the first candidate character for each input character to the host side, and also reads and sends the corresponding character code from the candidate memory 8 in response to pressing of the correction key 17 or the next candidate key 20. .

Therefore, in this example as well, the correct character pattern of the candidate character selected by recognition is displayed on the display screen.

(g) Effects of the Invention According to the present invention, the character generator on the host computer side can recognize the correct character pattern of the candidate character selected by the character recognition device, regardless of which one of the plurality of character code tables is used. , it can always be displayed on the display means on the host side, and therefore restrictions on the hardware of the connected host computer are relaxed, greatly contributing to the spread of character recognition devices.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the structure of one embodiment of the invention, and FIG. 2 is a block diagram showing the structure of another embodiment of the invention. 1...Character recognition device, 2...Host computer,
5...Dictionary section, 6...Code memory, 7...Recognition section, 8
...Candidate memory, 9...Control unit, 10...First code memory, 11...Auxiliary code memory, 14...Display, 16...Character generator, 21...First code memory, 22...Second code memory, 23
...Selection section.

Claims (1)

[Claims] 1 Based on a character recognition device that recognizes an input character, selects a candidate character for the input character, and sends the character code of the candidate character, and one of a plurality of character code tables showing the correspondence between characters and character codes. a character generator that stores character patterns, and a host computer equipped with a display means, and converts the character code of the candidate character sent from the character recognition device into a corresponding character pattern by the character generator. In the character recognition system that displays the character pattern on the display means, the host computer sends code table information indicating which one of the plurality of character code tables the character generator is based on prior to recognition. The character recognition device stores a plurality of character codes based on the plurality of character code tables in a code memory, and also stores character codes corresponding to the candidate characters in the character code table according to the code table information. A character recognition system characterized by reading and outputting from a code memory.