JPS6174080A - Display system of character recognizing device - Google Patents

Abstract

PURPOSE:To improve operability by an operator by displaying high luminance or flash when the resemblance degree is smaller than the prescribed value concerning a candidate character, for which a recognizing ratio is the No.1, out of plural candidate characters. CONSTITUTION:Concerning the No.1 candidate of respective recognized characters outputted from a recognizing part 5, a comparing part 22 inputs the character code and the resemblance degree as the calculating result and compares the resemblance degree with the prescribed value. At the comparing part 22, when it is judged that the resemblance degree of the No.1 candidate character is very small and smaller than the prescribed value, resemblance degree information is inputted 19 from the comparing part 22 together with the character code. For this reason, a correcting control part 19 sends a character code, high luminance display or flash display instruction to a display control part 11, and at the screen of a CRT display 10, the high luminance or the flash is displayed for the No.1 candidate character.

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.

(b) Conventional technology Japanese Patent Application Laid-Open No. 59-105181 discloses that a plurality of candidate characters are selected by similarity calculation, and these candidate characters are sequentially displayed on a character display in descending order of recognition rate according to the press of a correction key. What is displayed in the text is disclosed.

(c) Problems to be solved by the invention In the conventional technology, it is good when the correct character is among the candidate characters with higher recognition rate, but the correct character is among the candidate characters with lower recognition rate. I had to press the correction key over and over again to get the settings to work, and it wasn't very easy to use.

Therefore, the applicant has provided a second correction key, and when this correction key is operated, all candidate characters are displayed along with numbers on a part of the display screen, and the correct character is selected by pressing the selection key. It was considered to use the second correction mode in combination with the above-mentioned conventional technique.

However, in character recognition, there are times when only candidate characters with a very small degree of similarity are obtained, and it is preferable to use the second correction mode for such cases. However, it is not possible to judge whether the similarity is too small or too small by looking at the display screen, so in the conventional first correction mode, press the correction key χ two or three times to find the correct character. If it is not displayed, it is necessary to use the correction mode in bar 2, which is a cumbersome operation.

(-# Means for Solving the Problems The present invention is based on the first
and a second correction mode Y,
means for comparing the degree of similarity of the candidate character with the first recognition rate among the plurality of candidate characters with a predetermined value; This is a method of displaying high brightness or blinking when coding candidate characters.

(e) Effect In the present invention, when the similarity of the first candidate character is smaller than a predetermined value, the candidate character is displayed with high brightness or blinking, so that the operator can use this display to It can be known that the degree of similarity between the characters is very low, and therefore, the misrecognized characters are immediately corrected in the second correction mode, eliminating the need for unnecessary operations in the first correction mode.

(f) Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention.A')
fil is composed of a CCD image sensor and a paper feed mechanism, and is configured to input a predetermined input paper (21) as shown in FIG.
Read the handwritten characters written on it, convert it into a binary or multivalued character pattern, store the character pattern thus obtained in the input character pattern memory (3), and save the stored character butter yYi character. (4) is a dictionary section that stores standard feature patterns for each character; (5) extracts feature patterns from the input character pattern and compares them with the standard feature pattern; A recognition unit (6) calculates the degree of similarity, selects n candidate characters with a high degree of similarity, that is, a high recognition rate, and outputs their character codes, as shown in FIG. For each of n consecutive storage areas (
6a) (6b)... are allocated, and each storage area is also a candidate memory configured to be continuous, and the first to nth areas of each storage area of this candidate memory (6) are allocated. , n candidate character codes are stored in order of recognition rate, here, in order of recognition rate. In addition, candidate memory (
If the capacity of 6) is the number of characters for one sheet of input paper (2) '&N, then the capacity to store nXN character codes is small (both are required).

In Figure 1, (7) consists of a screen memory (8) into which the character code of the character to be displayed is written, a character generator (9) which converts the character code into a pattern, and a CRT display 001, which displays the recognition results. Character display device for displaying requests (old) is CRT display 0t
Cursor pointer (1) that specifies the cursor position on
21, (IJ is a Kahnle movement key (
141, an up key and a down key phase as a modification key in the first modification mode, a modification key CI in the second modification mode, and an O numeric keypad 211 as a selection key, (17) is Correction flag, (I81 is the correction pointer, (1g is the old display control unit) input the cursor position information and correction key information, and the correction flag (171
and correction pointer αP5y, and candidate memo 1
A correction control unit (22
For the first candidate character of each recognized character outputted from the recognition unit (5), the character code and the degree of similarity as a calculation result are input, the degree of similarity is compared with a predetermined value, and the result of the comparison is If it is smaller than a predetermined value, similarity information χ indicating that
, is a comparison unit that outputs the character code to the correction control unit 09.

In this embodiment, the recognition result of the character written in the upper left corner of the input form (21) shown in FIG. 2 is displayed at the "0" position of the cursor pointer a21 on the screen of the CRT display. Monotoro.

The operation of this embodiment will be explained with a focus on the processing contents of the correction control unit (191) shown in FIG.

When inputting the input form (21 shown in Fig. 2) into the character input section (1), the recognition section (5) selects n candidate characters for each character to be recognized, and selects candidate memo 1 as described above. Month 6)
The first candidate character code of each character to be recognized is stored in the soft part (n and j1 through the modification control part a9).
■It is transferred to the dim display control unit 111 and written in the screen memo (January 8). Therefore, the CRT display f10
On the screen No. 1, the first candidate character for each of the characters to be recognized is displayed, as shown in Figure 9). Here, for example, the second character "ma" is misrecognized and "ma" is displayed, and the second to nth candidate characters for this character are "open".

"Ma", "Seki", ..., "Threshold", "Mon" are selected and stored in the first to nth areas of the storage area (6b) of the candidate memo January 6) do.

Therefore, in order to correct the character "ma", while looking at the CRT display 001'ff:, first press the cursor movement key u.
4Iyal' operation to move the cursor to the misrecognized character position "between" and then press any of the correction keys. Assume that @1 first presses the down key 6) in order to make a correction in the first correction mode.

When exiting, the display control section (in ill, the cursor pointer α
The content KP of 2 changes to "1" corresponding to the cursor position, and this cursor position information "1" and correction key information C1D indicating the rank key are transferred from the display control section (old) to the correction control section α.
Transfer to g. Then, the correction control unit 0 performs the processing shown in the flowchart shown in FIG.

That is, the modification control unit cLl first initializes the content CpvrOJ of the modification pointer 0&, and sets the value m'k to "0".
Initialize to . In addition, import the correction key information C1DY,
The correction flag CF is set to "OO" and compared with the contents Kla-fetched m of the cursor pointer az. in this case,
KP=1. Since m=:O, the correction pointer (content of 181 is initialized to CP'YrOJ with m=KP).

Next, the correction flag CF is checked, but in this case,
Since CF=OO, the content of correction pointer ff81 is incremented to CP=, and the address AD of candidate memo IJt61 is
”k, cursor pointer (12) and modification pointer δ
The total is based on the contents of KP and CP. Then, A
Since D = n + 1, the candidate character code stored in the second area of the storage area (6b), that is, the character code of the second candidate character "open", is read out and the display control unit (old) be transferred to. Display control section aυ is screen memo January 6)
Since the character code ``open'' is written at the position indicated by the cursor pointer (12+), the character ``open'' will be displayed on the screen of the CRT display 001 instead of the character ``ma''.

In this case, "open" is still a misrecognized character, so press the down key (16) Y again.Then, the correction control unit ■ determines whether the content KP of the cursor pointer (lz) has changed, and If not, further increment the contents of correction pointer 08).This one time, candidate memo January 6
), AD=n+2 is addressed, the character code of the third candidate character "ma" is read out, and in the same way, CR
On the T-display (IIJI screen), the character ``Ma'' is displayed instead of the character ``Open''.

As a result, the misrecognized character "ma" must be corrected to the correct character "ma".

In this way, as you press the taran key (06) one after another, candidate characters are displayed in order of recognition rate, and the line (,
After the candidate character "mon" at position lEn is displayed, press the down key (161) and the correction pointer (181 contents C
Since P is initialized to "0", the first candidate character "ma" is displayed, and the candidate characters are cyclically displayed as shown in FIG. 6(a).

Also, if there are other misrecognized characters, move the cursor to the position of the misrecognized characters and press the down keys u6+v in the same way.
push. Then, since the content KP of the cursor pointer (121 changes), the change is determined by comparing it with the value m indicating KP when the previous modification key was pressed, and the content CP of the modification pointer (181 is initialized). Be. Therefore,
If the down key (16) is pressed in sequence, 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 nth position.

Next, we will explain the case where you press the up key (151).Currently, the cursor position on the CRT display (lull cursor pointer 11) is showing the nth candidate character "mon", and the It is assumed that the content CP of the positive pointer (181) is [n −1j.

Here, when the up key 051 is pressed, the correction flag CF is set to "Iol", the content CP of the correction pointer (181) is decremented, and the address of the candidate memory (61) becomes A D = 2 n -2. Therefore, the character code of the (n-1,)-th candidate character 1-threshold is continuously generated and transferred to the display system a section (11). The transferred character code is written to the position indicated by the cursor pointer (12+) in the double-sided memory (8) in the same way as when pressing the key 116).
On the screen of the CRT display (101), "Threshold" should be displayed instead of "Gate".Hereafter, by pressing the up key 4151 1i1gj, the correction pointer (1
Since the sharp content CP is decremented each time, the candidates are displayed in the order of candidate characters n with the lowest recognition rate. Then, when ``Seki'' is displayed, press the up key 051, and the ``correct character gap'' will be displayed, allowing you to complete the correction of the misrecognized characters.

By the way, if you press the Anof key (15 + v), the first candidate character "ma" will be displayed, but in this case, if you further press the up key (151), the contents of the correction pointer ffR1
Since P is set to [n-IJ, the nth candidate character "mon" is displayed again, and the candidate characters are cyclically displayed as shown in FIG. 6(b).

In this way, when the down key (16+) and the amp key 0 are pressed, characters with a higher recognition rate and a lower recognition rate than the displayed candidate characters will be displayed, respectively.

The second correction mode will be explained below.

In the second correction mode as well, the cursor is first moved to the misrecognized character "ma". Then press the correction key ■. Then, the modification control unit 09 takes in the modification key information C2 and sets the modification flag CF to "10". When checking the correction flag CF, since CF=10, the correction pointer d mark is incremented, and A D = n + 1,
The character code of the second candidate character "open" is read from the candidate memory (6) and transferred to the display control unit (ill).Next, the correction pointer (181 is further incremented and the candidate memo January 6) address n +2 is specified,
The character code of the third candidate character "Mako" is read and transferred to the display control unit (old).Then, the character code is read and transferred until the content CP of the correction pointer unagi is nl/konaro. As a result, all (n-1) character codes from 2nd to ZAn are transferred to the display control unit (old).The display control unit (11) transfers each of these character codes. , and write it on the bottom line of the screen memo (January 8).For this reason, on the screen of the CRT display II l+, as shown in Figure 5 (b), (n-1) candidate characters are displayed. is displayed together with the number. Then, if you select the number corresponding to the correct character using the numeric keypad Q11, the selected character will be displayed at the cursor position instead of the incorrectly recognized character. If you select "2",
As shown in Figure 5, the character ``1 ma'' is displayed instead of ``ma''.

By the way, if the comparison unit (2) determines that the similarity of the first candidate character is thicker than a predetermined value,
Since only the character code should be input to the Bakusho control unit (191), the first candidate character is normally displayed on the screen of the CRT display (101), or the similarity is determined to be very small and smaller than a predetermined value. In this case, as mentioned above, similarity information should be input along with the character code from the comparison section (2z. Therefore, the correction system A part eel is the display system # part old), and the character code is displayed in high brightness or A blinking display command is sent, and the first candidate character is displayed blinking on the screen of the CRT display 001.

Therefore, the operator should judge that characters that are displayed with high brightness or blinking are likely to be misrecognized characters, carefully check whether the characters are misrecognized, and if they are misrecognized characters, immediately correct them. By pressing the key [201], incorrectly recognized characters can be corrected in the second correction mode. In other words,
If the similarity is greater than or equal to the predetermined value, there is a high probability that the correct character exists among the candidate characters with higher recognition rates, and therefore brush 1
I wonder if it would be faster to fix it without using the correction mode.If @ is less than a predetermined value, there is not much difference in the probability that the correct character exists at the top and the probability that it exists at the bottom, so I used the second correction mode to correct it. Please fix it faster. In addition, when the similarity is smaller than a predetermined value, the correct character may not exist among the candidate characters. Sometimes I end up pressing the edit key, so I checked it (
However, if you use the 2nd correction mode, all candidate characters will be displayed on the screen, so you can easily confirm that there are no correct characters. In addition, in this case, you can input the kana reading in pairs with the correct character and convert it to kanji.

(g) Effects of the Invention According to the present invention, candidate characters with extremely low similarity, which make the recognition result by similarity calculation unreliable, are displayed with high brightness or blinking, so the operator can recognize these characters. Carefully check whether the characters are correct or not, and you will not miss any misrecognized characters.

Furthermore, if the first candidate character is a misrecognized character, the first correction mode can be used without performing key operations many times.
Immediate use of the second correction mode is prompted by a high-intensity or blinking display, improving operability. or,
Check if there is a correct character among the candidate characters.
P-minute.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention (not shown), Fig. 2 is an example of a handwritten character string written on an input form, Fig. 3 is an explanatory diagram of the candidate memory structure and water resistance, and Fig. 4 is a modified version. FIG. 5 is an explanatory diagram showing one implicit example, and FIG. 6 is an explanatory diagram showing cyclic display. Explanation of the main figure number (1)...Character input section, (5)...Recognition section, (
61...Candidate memory, (7)...Character display device,
Old)...Display control unit, 03)...Keyboard,
(191... correction control section, 122+... comparison section.

Claims (1)

[Claims] (1) A recognition unit that calculates similarity and selects multiple candidate characters, a character display device that displays recognition results, and first and second modification keys that modify the displayed recognition results. a first correction mode in which the plurality of candidate characters are sequentially displayed one by one on the character display device by sequentially pressing the first correction key; In a character recognition device having a second correction mode in which all of the plurality of candidate characters are displayed on a display device and one of the candidate characters is selected by a selection key, the recognition rate ranks first among the plurality of candidate characters. Provide means for comparing the degree of similarity of the candidate characters with a predetermined value,
As a result of the comparison, when the degree of similarity is smaller than a predetermined value, when displaying the first candidate character on the character display device,
A display method for a character recognition device characterized by a high brightness or blinking display.