JPS6174084A - Character recognizing device - Google Patents

Abstract

PURPOSE:To improve operability and to shorten processing time by pushing down a correcting key successively and displaying successively plural candidate characters at the line and cursor positions in the order of a high recognizing ratio. CONSTITUTION:At a recognizing part 5, the (n) numbers of candidate characters for respective recognized characters are selected and stored in a candidate memory 6. The first candidate character of respective recognized characters is successively transferred through a correcting control part 19 to a display part 11 and written in a screen memory 8. A cursor shifting key 14 is operated, the cursor is shifted to the character position of erroneous recognition, and the down-key 16 of the correcting key is pushed down. In the display control part 11, the contents of a cursor pointer 12 are changed corresponding to a cursor position, and cursor position information and correcting key information showing a down-key are transferred from the display control part 11 to the correcting control part 19. When the down-key 16 is successively pushed down, the candidate character is successively displayed in the high order of a recognizing ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a character recognition device that recognizes handwritten characters and displays the recognition results on a character display device.

The conventional technology disclosed in Japanese Unexamined Patent Publication No. 59-105181 discloses that a plurality of candidate characters are selected by similarity calculation, and the candidate characters are sequentially displayed on a character display device in descending order of Ha rate in response to pressing a correction key. What is disclosed is disclosed.

(c) Problems to be Solved by the Invention In the conventional technology described above, the candidate character with the highest recognition rate for a plurality of characters to be recognized is placed in the first distance layer, and the candidate character with the fourth highest recognition rate is placed in the first distance layer. The characters are placed in the nth distance 1Iift layer (yi
is an integer of 2 or more), and in response to the press of the correction key, candidate characters of the (rn-1) distance layer are stored in the corresponding storage area of the m distance layer (m may be 2). (up to an integer up to), the candidate characters are displayed in order of recognition rate.

For this reason, there have been problems in that the processing speed is slow and the control is complicated.

B.) Means for Solving the Problems The present invention provides a candidate memory that stores a plurality of candidate characters in consecutive storage areas in order of recognition rate, and that stores the storage areas for a plurality of characters to be recognized; A correction pointer that is initialized each time a cursor key is operated and whose contents change depending on the number of presses of the correction key, a cursor position and refresh information that change according to the cursor key operation, and the contents of the correction pointer. This character recognition device includes a correction control section that specifies addresses of candidate memories and sends the specified contents to a display control section.

(e) Effect In the present invention, the candidate memory is addressed by the contents of the correction pointer and cursor position information, the correction pointer changes according to the press of the correction key, and furthermore, the candidate memory has a plurality of candidate characters with recognition rate. Since the candidate characters are stored in consecutive storage areas in order of rank, if you press the correction key in sequence, the multiple candidate characters at the cursor position are transferred to the display control unit in order of recognition rate. In the display device,
A plurality of candidate characters are displayed in order of recognition rate. Then, if you move the cursor using the cursor keys,
Since the correction pointer is initialized, similarly, by successively pressing the correction key, a plurality of candidate characters corresponding to the moved cursor position are sequentially displayed from the beginning in descending order of recognition rate.

(f) Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention.
1) consists of a COD image sensor and a paper feed mechanism, and as shown in Figure 2, reads handwritten characters written on a predetermined input paper (2) and converts them into a binary or multivalued character pattern. Then, the character pattern obtained in this way is stored in the input character pattern memo (January 3), and the character input section cuts out the stored character pattern one character at a time and sequentially sends it out. (4) is the standard feature of each character. The dictionary section (5) that stores the pattern extracts the feature pattern from the input character pattern and compares it with the standard feature pattern.
As shown in FIG. For each character to be recognized, consecutive memory areas (6
a) (6b)...... are allocated, and each storage area is also configured to be continuous. The area stores candidate character codes in order of recognition rate, here, in order of recognition rate. As for the capacity of the candidate memo (January 6), if N is the number of characters for one sheet of input paper (2), the capacity to store the character codes of rcxN is small (both are required).

Furthermore, in Fig. 1, (7) is a screen memo in which the character code of the character to be displayed is written, and a character generator (9) that converts the character code into a dot pattern.
and a CFLT display aO, a character display device for displaying recognition results, and συ is a CRT display 0.
0) Cursor pointer Oz that specifies the upper cursor position
03 is a cursor movement key 04) and an up key Q51 and a down key (1
6), (17) is a correction flag, αa
is the correction pointer, α■ is the cursor position information and correction key information from the display control unit 01), and the correction flag aη
This is a modification control unit that controls the modification pointer ttS+ and addresses the candidate memory (6), reads out the stored candidate character codes, and transfers them to the display control unit 0υ. In this embodiment, the recognition result of the character written in the upper left corner of the input sheet (2) shown in FIG. 2 is displayed on the CRT display α.
On the screen shown in (2), the input pointer (Iz) is displayed at the "0" position.

Next, the operation of this embodiment will be explained, focusing on the processing contents of the correction control section a9 shown in FIG.

When the input form (2) shown in FIG. 2 is input into the character input section (1), as mentioned above, the recognition section (5) selects candidate characters for each character to be recognized, and the candidate memory ( 6)
However, the first candidate character of each recognized character is sequentially transferred to the display control unit αυ via the correction control unit (1'J) and written into the screen memory (8). Therefore, on the screen of the CRT display screen, the first candidate character for each of the characters to be recognized will be displayed as shown in Figure 5.For example, the second character "ma" will be displayed. is misrecognized and "ma" is displayed, and the candidate characters from the second to the first place of this character are "kai", "ma", "seki", ..., " Assume that the threshold J and "gate" are selected and stored in the first to second areas of the storage area (6b) of the candidate memory (6).

Therefore, in order to correct the character "ma", while looking at the CRT display aO), first press the cursor movement key (14).
to move the cursor to the incorrectly recognized character position. Then, the user presses down key tm as a modification key.

Then, in the display control unit OI), the cursor pointer α2
The content KP changes to "1" corresponding to the cursor position,
This cursor position information "1" and modification key information CD indicating the down key are transferred from the display control section 01) to the modification control section I. Then, the correction control unit (11) performs the processing shown in the flowchart shown in FIG.

That is, the modification control unit a1 first selects the modification pointer (18).
Initialize the content CP to "0" and set the value m to rOJ
Initialize to . Next, import the correction key information CD, set the correction flag CF to "0", and move the cursor pointer α
Compare the contents KP of 2 with the import m - in this case KP=
1, m=Q, so m=KP and the content CP of the correction pointer 08 is initialized to "0". Next, modify flag C
F is checked, but in this case, since CF=O, the correction pointer (IQ content CP is incremented, and the address AD of the candidate memory (6) is set based on the cursor pointer α and the correction pointer contents KP and CP of group 0. Then, AD=ru+1, so the storage area (6b
), that is, the candidate character code stored in the second area of
The character code of the second candidate character "open" is leaked and transferred to the display control unit αυ. The display control unit (11) displays "Open" at the position indicated by the cursor pointer 0z of the screen memo (January 6).
Since the character code of is written, on the screen of the CRT display Q, the character ``open'' is displayed instead of the character ``ma''.

In this case, the character ``open'' is incorrectly recognized as rice, so press the down key scream again. Then, the modification control unit f19 determines whether the content KP of the cursor pointer α2 has changed, and if it has not changed, the content of the modification pointer (lυ) is further incremented. Therefore, in the candidate memory (6), AD=L +2 is addressed and the third candidate character “
The character code for "between" is read out, and in the same way, on the screen of the CRT display Q (ll), instead of one character "open", "
” is displayed.

As a result, the incorrectly recognized character "ma" is corrected to the correct character "ma".

In this way, as you press the down key (161) in sequence, candidate characters are displayed in order of recognition rate.
After the first candidate character "mon" is displayed, if you press the down key G6) again, the content CP of the correction pointer α go is initialized to "O", so the first candidate character "mon" is displayed. ” will be displayed, as shown in Figure 6 (a).
Candidate characters are displayed cyclically.

If there are other misrecognized characters, move the cursor to the position of the misrecognized characters and press the down key αe in the same way. Then, since the content KP of the cursor pointer α2 changes, the change is determined to be the value indicating KP when the previous correction key was pressed, and the content CP of the correction pointer α barrel is initialized. Ru. Therefore, if the down key αe is pressed one after another, candidate characters for the misrecognized character at the position to which the cursor has been moved are sequentially displayed from the second position to the first position.

Next, the case where the up key (15) is pressed will be explained. Now, at the cursor position of the CRT display (IQ+ cursor pointer "1"), the first candidate character "Mon" is displayed.
is displayed, and the content CP of the correction pointer α is r3.
-1".

Here, when you press the up key a5, the correction flag CF is set to "
1", the content CP of correction pointer α9
is decremented and address A of candidate memo January 6) is decremented.
D = 23-2. Therefore, the character code of the candidate character "threshold" of the first (Rue 1) blood is read out and transferred to the display control unit αU. In the display control unit Q1), the transferred character code is written in the position indicated by the cursor pointer (1z) of the single-screen memo January 8) in the same way as when the down key 06) is pressed, so the screen of the CRT display +101 is written. In this case, "threshold" will be displayed instead of "gate". From now on, if you press the up key 1151 one after another, the content CP of the correction pointer Oe will be decremented each time, so you can select candidates with a low recognition rate. The characters are displayed in order.

Then, when the up key (IJ) is further pressed after "Seki" is displayed, the correct character "Ma" is displayed and the correction of the misrecognized character is completed.

By the way, press the up key (15) and the first candidate character "ma" will be displayed, but in this case, if you press the up key a9 again, the correction pointer (content CP of 11 will be changed to 1-
Since rL is set to IJ, the i-position candidate character "mon" is displayed again, and the candidate characters are displayed cyclically as shown in FIG. 6 (b).

In this way, when the down key (16) and the up key 09 are pressed, one character each with a higher recognition rate and a lower recognition rate than the displayed candidate character is displayed.

Therefore, when trying to correct the first candidate character "ma", I accidentally pressed the down key (161) three times.
If you fail to display the correct character "ma", press the up key α
Erroneously recognized characters can be corrected by operating 9 once.

(G) Effects of the Invention According to the present invention, displaying a plurality of candidate characters in order of recognition rate can be achieved with simple control and in a short processing time.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an example of a handwritten character string written on an input sheet, Fig. 3 is an explanatory diagram showing the configuration of a candidate memory, and Fig. 4 is a correction control unit. FIG. 5 is an explanatory diagram showing a display example, and FIG. 6 is an explanatory diagram showing a cyclic display. Explanation of main drawing numbers (1)...Character input section, (5)...Recognition section, (
6)...Candidate memory, (7)...Character display device,
(111...display control unit, α9...keyboard,
(11... Correction control section. 1st port

Claims (1)

[Claims] (1) A recognition unit that selects a plurality of candidate characters for one character to be recognized, and a recognition unit that stores the plurality of candidate characters in consecutive storage areas in order of recognition rate ranking, and stores the storage area for each character to be recognized. a candidate memory provided for, a character display device for displaying recognition results, a display control unit, a cursor key and a correction key, which are initialized each time the cursor key is operated and are initialized according to the number of presses of the correction key. The address of the candidate memory is specified using a correction pointer whose contents change, cursor position information which changes according to the operation of the cursor key, and the contents of the correction pointer, and the specified contents are sent to the display control section. A character recognition device comprising: a modification control section, wherein the plurality of candidate characters are displayed on the character display device in order of recognition rate in response to pressing of the modification key.