JPH05128297A - Character recognition device - Google Patents

Abstract

PURPOSE:To make it possible to continue an input regardless of the correction or error of a recognized result by displaying a character pattern inputted by a handwriting as it is when the character pattern can not be recognized. CONSTITUTION:A recognition part 4 collates a standard feature pattern read from a standard pattern storage part 3 with the feature pattern delivered from a feature extraction part 2, transfers code information as a recognition result to a dot pattern generation part 5 and delivers the number of recognition candidate to a display control part 7. The dot pattern generation part 5 converts the code information received from the recognition part 4 into a dot pattern and delivers this to the display control part 7. The display control part 7 selects either of the two that the dot pattern is called from the dot pattern generation part 5 and the character pattern is read from a character pattern storage part 6 based on the number of the recognition candidate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character recognition device for recognizing handwritten characters and displaying the result on a display device.

[0002]

2. Description of the Related Art Generally, in the prior art, a character 27 which is not recognized correctly is displayed with a mark 27 indicating a recognition failure as shown in FIG. 10 or an input character 28 is erased while a warning sound is emitted as shown in FIG. It was supposed to be done.

[0003]

It is important to realize a high character recognition rate in a small information device such as a word processor for inputting characters by handwriting, an idea processor, an electronic notebook, an electronic memo, etc., but it is easy to handle. It is also important that the operating procedures do not interfere with the operation. That is, you need to be able to quickly write down ideas and thoughts that have flashed. If handwritten characters and the like are recognized and coded, it becomes very easy to handle as information, and the subsequent arrangement can be easily performed. However, character recognition is okay if the correct result is obtained, but must be corrected if the result is incorrect. Therefore, when inputting an inspirational idea, it is necessary to be aware of the recognition, which makes it difficult to realize an operation procedure that is easy to handle and does not interfere with thinking. In the above-described conventional technique shown in FIG. 10, the input character is replaced with the mark 27 indicating the recognition failure. However, if the character is input by handwriting in a scribbled state, the recognition rate is significantly reduced. Marks 27 are displayed everywhere, and it may be difficult to determine what was originally input. Further, it is necessary to re-input the mark 27 where it is displayed. Also in the example of FIG. 11, if the correct result is not obtained, the input must be repeated many times. It is very difficult to set the recognition rate of character recognition to 100%, and in reality, there are many cases of erroneous recognition. However, in the above-mentioned conventional technique, the consideration of the operation procedure in the case of erroneous recognition is not sufficient. In particular, when a recognition mechanism is incorporated in the small-sized information device, it is necessary to always be aware of whether or not it has been correctly recognized, which results in hindering thinking.

An object of the present invention is to realize a character recognition device which recognizes handwritten characters and displays the result, and which is easy to operate without interruption of the input when the recognition is not correctly performed. Especially.

[0005]

Means for Solving the Problems The above-mentioned object is to provide a means for inputting a character pattern, a feature extracting means for extracting a feature pattern from the input character pattern, and a standard pattern storing means for storing a standard feature pattern in advance. In a character recognition device comprising a recognition means for selecting a candidate as a recognition result of the character pattern from the standard pattern by collating the extracted characteristic pattern with the standard pattern, and a display means for displaying the recognition result. When the recognition result is not obtained from the recognition means, the display means is achieved by displaying the character pattern instead of the recognition result.

Furthermore, means for inputting a character pattern, feature extracting means for extracting a feature pattern from the input character pattern, standard pattern storing means for storing a standard feature pattern in advance, and the extracted feature pattern In the character recognition device comprising a recognition means for selecting a candidate as a recognition result of the character pattern from the standard pattern by collating the standard pattern with the character pattern and a display means for displaying the recognition result, the input character pattern Character pattern storage means, a dot pattern generation means for converting the recognition result into a dot pattern for display, and a display pattern read from the character pattern storage means in accordance with the number of candidates as the recognition result. Display on the display means or display pattern from the dot pattern generation means Is achieved by having a control means for selecting whether to display the said display means read.

Furthermore, means for inputting a character pattern, feature extracting means for extracting a feature pattern from the input character pattern, standard pattern storage means for storing a standard feature pattern in advance, and the extracted feature pattern In the character recognition device comprising a recognition means for selecting a candidate as a recognition result of the character pattern from the standard pattern by collating the standard pattern with the character pattern and a display means for displaying the recognition result, the input character pattern Character pattern storing means for holding, a dot pattern generating means for converting the recognition result into a dot pattern for displaying, and a display pattern is read from the dot pattern generating means when a recognition result is obtained, and the recognition result If is not obtained, the display pattern is read from the character pattern storage means. Comprising a control means, a display pattern read out from said control means is accomplished by displaying in the display means.

Furthermore, the control means is achieved by reading the display pattern from the character pattern storage means and displaying it on the display means when no candidate is obtained as a recognition result.

Further, the control means is achieved by reading out a display pattern from the character pattern storage means and displaying it on the display means when the number of candidates as the recognition result is plural.

Furthermore, means for inputting handwritten characters,
Feature extraction means for extracting a feature pattern from an input character pattern, standard pattern storage means for storing a standard feature pattern in advance, and recognition of the character pattern by collating the extracted feature pattern with the standard pattern. A recognition means for selecting a result candidate from a standard pattern, a dot pattern generation means for converting the recognition result into a dot pattern for display, and a means for displaying the recognition result and inputting the handwritten character are integrated. In the character recognition device having the display means, the locus of the input handwritten character is immediately displayed, and when a candidate as a recognition result is obtained from the character recognition means, the dot pattern generation means is displayed instead of the locus. The pattern is read out and displayed, and if no candidate is obtained as a recognition result, the It is achieved by having a control means for keep displaying the trajectory.

Furthermore, it is achieved by providing an indicating means for instructing the character pattern portion displayed on the display device, and a correcting means for inputting the character pattern again when instructed by the instructing means. ..

Furthermore, as a result of recognizing the display means for instructing the character pattern portion displayed on the display device and the character pattern instructed by the instructing means, when there are a plurality of candidates, the plurality of candidates are displayed. This is achieved by displaying candidates and selecting the correct result from them.

[0013]

The above-mentioned control device, according to the result of character recognition,
It is selected whether to display a character pattern input by handwriting or a dot pattern for displaying code information as a recognition result. Specifically, when it cannot be recognized, the character pattern input by handwriting is displayed as it is. The user can continue to input regardless of whether the recognition result is correct or incorrect. Then, according to the convenience of the user, for example, when the writing is completed, the character pattern is instructed using the instructing means, and the character is input again by handwriting so that a correct recognition result can be obtained again. When a plurality of candidates are obtained as a result of recognition, the character pattern input by handwriting is displayed as it is. Then, similarly, the character pattern is instructed by the instructing means according to the convenience of the user. Thereby, a plurality of recognition candidates are displayed and the correct result is selected. If there is no correct result in the character candidates,
Enter the character again by handwriting.

As described above, according to the present invention, the input can be continued even when the recognition is not correctly performed, and the correction can be properly performed according to the convenience of the user. An easy character recognition device can be realized.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a character recognition apparatus according to the present invention, and shows an example of its construction. Reference numeral 1 denotes an input unit configured to input a character pattern, such as a tablet equipped with a pen capable of handwriting input, an image scanner, or the like, and 2 a feature extraction unit configured to extract a feature pattern from the input character pattern,
Reference numeral 3 is a standard pattern storage unit in which standard characteristic patterns are stored in advance, and 4 is a candidate as a recognition result of a character pattern input by collating the extracted characteristic pattern with the standard pattern. The recognition unit 5 converts the code information after recognition into a dot pattern generation unit that converts the code information after recognition into a dot pattern for display, 6 is a character pattern storage unit that holds an input character pattern, and 7 is a candidate as a recognition result. A display control unit 8 selects a character pattern or a dot pattern as a display pattern according to the number of the display patterns, and a display unit 8 displays the display pattern from the display control unit. The character pattern input from the input unit 1 is sent to the feature extraction unit 2 and the character pattern storage unit 6.
The feature extraction unit 2 extracts a feature pattern required for recognition from the sent character pattern and transfers it to the recognition unit 4. On the other hand, the character pattern storage unit 6 temporarily stores the sent character pattern. Next, the recognition unit 4 collates the standard feature pattern read from the standard pattern storage unit 3 with the feature pattern sent from the feature extraction unit 2, and the code information as the recognition result is used as the dot pattern generation unit 5 And the number of recognition candidates is sent to the display control unit 7. The dot pattern generation unit 5 converts the code information received from the recognition unit 4 into a dot pattern for display and sends the dot pattern to the display unit 7. The display control unit 7 uses the dot pattern generation unit 5 based on the number of recognition candidates sent from the recognition unit 4.
Select whether to read a dot pattern from or to read a character pattern stored in the character pattern storage unit 6 and send it to the display unit 8 as a display pattern. As a selection criterion, when the number of recognition candidates is one, the pattern of the dot pattern generation unit 5 is sent to the display unit 8, and otherwise, the pattern of the character pattern storage unit 6 is sent to the display unit 8. As other criteria, when the recognition candidate is not obtained, the pattern of the character pattern storage unit 6 is sent to the display unit 8, and in other cases, the pattern of the dot pattern generation unit 5 is sent to the display unit 8. The display unit 8 displays according to the display pattern thus selected.

Next, an example of a display screen of the character recognition device according to the present invention is shown in FIG. The same parts as those in FIG. 1 are designated by the same reference numerals.

FIG. 2 shows the result of recognizing input characters. Among the characters of the input "character recognition system", each of "sentence", "character", "recognition", "shi", "su", "te", "mu" is correctly recognized, and the pattern of the dot pattern generation unit 5 in FIG. Is displayed. However, since the character "knowledge" could not be correctly recognized, the character pattern stored in the character pattern storage unit 6 is displayed. As described above, according to the present embodiment, the characters that were not correctly recognized as in the prior art are replaced with the marks 27, so that the characters originally input become unclear, or the characters input with the warning sound are erased. Since you do not have to retype it immediately,
It is possible to realize a character recognition device that can concentrate on input without paying attention to whether it is correctly recognized. Incidentally, a means for correcting the character "knowledge" which is not correctly recognized will be described later.

Next, another embodiment of the character recognition device according to the present invention is shown in FIG. For the same parts as in FIG. 1,
The same reference numerals are given.

FIG. 3 shows an example in which the input unit 1 and the display unit 8 of the character recognition device are integrated to form a display-integrated tablet 9. At this time, the input unit 1 is composed of a tablet capable of inputting coordinates with a pen, and the display unit 8 is composed of a flat panel display such as a liquid crystal display or a plasma display. Make up 9. In the present embodiment, the display-integrated tablet 9 can be used to electronically realize the paper and the pen, and the character recognition device according to the present invention can be made easier to use. That is, it is possible to input characters as if using a pen and paper. Further, the present embodiment can be applied to a small information device such as a word processor having a handwriting input function, an idea processor, an electronic notebook and an electronic memo.

Next, an example of the hardware configuration of the character recognition device according to the present invention will be described with reference to FIG.

In FIG. 4, the character recognition device is a CPU 1
0, a ROM 12 that stores a program executed by the CPU 10 to implement each unit of FIGS. 1 and 3, a RAM 13 that temporarily stores a character pattern, and a standard pattern memory 14 that stores a standard feature pattern. 3, a display-integrated tablet 15 in which the input unit 1 and the display unit 8 are integrated, a CPU 10, a ROM 12, a RAM 13, a standard pattern memory 14, and a bus 11 connecting the display-integrated tablet 15 are provided.

Next, the operation of the display controller 7 shown in FIGS. 1 and 3 will be described with reference to FIG. FIG. 5 is an example in which the pattern of the dot pattern generation unit 5 is displayed on the display unit 8 when the number of recognition result candidates is one. The display control unit 7 acquires the number of recognition result candidates from the recognition unit 4 (step 1
6). Next, the processing is divided according to the number (step 1
7). If the number of candidates is one, the process proceeds to step 18, otherwise, if the number of candidates is zero or two or more, the process proceeds to step 19. Step 18 is a step of obtaining a display pattern from the dot pattern generation unit 5. Further, step 19 is a step of obtaining a display pattern from the character pattern storage unit 6. After obtaining either display pattern in this way, this is sent to the display unit 8 and displayed (step 20).

Similarly, another operation of the display controller 7 will be described with reference to FIG. FIG. 6 shows the pattern of the character pattern storage unit 6 when the candidate is not obtained as a result of recognition.
This is an example of displaying with. The same processing steps as those in FIG. 5 are designated by the same reference numerals. The display control unit 7 acquires the number of recognition result candidates from the recognition unit 4 (step 1
6). Next, the processing is divided according to the number (step 21). When the number of candidates is 0, go to step 19,
Otherwise, that is, when the number of candidates is 1 or more, the process proceeds to step 18. Hereafter, steps 18, 19, 20
Is the same as that in FIG. 5, and the description is omitted.

As described above, according to the embodiment of the present invention, when the handwritten input character is not correctly recognized, the handwritten character pattern is displayed as it is, so that the input is not interrupted and the thinking is not disturbed. A character recognition device can be provided.

Next, a method of correcting a character that is not correctly recognized will be described. FIG. 7 is an example showing how to make a correction. The same parts as those in the other figures are designated by the same reference numerals.

FIG. 7A shows the handwritten character pattern 24 in which the character "knowledge" is not correctly recognized among the characters input by handwriting. To correct the "sense" character in such a state, the pen 22 attached to the display-integrated tablet 15 is used to instruct the menu 23 displayed as "correct". Next, as shown in FIG. 7 (b), when the character "knowledge" is designated with the pen 22, the area 24 'is erased, and the state becomes re-inputtable. And
As shown in FIG. 7C, the pen 25 is used again to print the character 25.
You can input by handwriting and recognize it.

Next, FIG. 8 shows another mode of correcting a character which is not correctly recognized.

FIG. 8 (a) shows "sense" as in FIG. 7 (a).
Is not displayed correctly and is displayed as the handwritten character pattern 24. Then, in order to correct this, the pen 22 is used to instruct the menu 23 displayed as “correct”. Next, as shown in FIG. 8B, when the character "intelligence" is designated using the pen 22, the candidate 26 of the recognized result is displayed. That is, in this example, as a result of recognition, there are a plurality of candidates (three in this example). Since the correct one among the candidates 26 is “knowledge”, the candidate 26 is used by using the pen 22 as shown in FIG.
Instruct the "sense" character of. As a result, the correct recognition result 27 can be obtained.

As described above, FIG. 9 is a block diagram of a character recognition device capable of correcting a character that has not been correctly recognized.
Shown in. In FIG. 9, the same parts as those in FIGS. 1 and 3 are designated by the same reference numerals.

FIG. 9 uses a menu control unit 29 to display a menu for correction and a plurality of recognition candidates. The menu control unit 29 causes the display unit 8 to display the menu 23 for correction. In addition, using the pen 22,
It is determined whether or not the correction menu 23 is instructed. Further, as a result of recognition, the recognition result storage unit 30 that stores the number of candidates and the state displayed on the display unit 8 is used. Each state stored in the recognition result storage unit 30 is sent to the menu control unit 29 as necessary and used for controlling the display unit 8. When it is determined that the correction menu 23 is instructed using the pen 22 and the character pattern to be corrected is subsequently instructed, the menu control unit 29 reads out the recognition result regarding the corresponding character pattern from the recognition result storage unit 30. .. Specifically, it is the number of recognition candidates or the like. Then, for example, when the number of candidates is 0, the input unit 1, so that handwritten characters can be input again by the procedure as shown in FIG.
The display unit 8 is controlled. When the number of candidates is plural, the input unit 1 and the display unit 8 are controlled so that the correct one can be selected from the plural candidates by the procedure shown in FIG.

As described above, according to the embodiment of the present invention, it is possible to realize a character recognition device that can correct a character that has not been recognized correctly at any time according to the convenience of the user.

[0033]

According to the present invention, it is possible to continue the input even when the recognition is not correctly performed, and the correct correction can be made at any time according to the convenience of the user. An easy character recognition device can be realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a character recognition device.

FIG. 2 is a diagram showing an example of a display screen of a character recognition device.

FIG. 3 is a diagram showing another configuration example of the character recognition device.

FIG. 4 is a diagram illustrating an example of a hardware configuration.

FIG. 5 is a diagram showing operation steps of a display control unit.

FIG. 6 is a diagram showing another operation step of the display control unit.

FIG. 7 is a diagram showing a correction method in the case where it is not correctly recognized.

FIG. 8 is a diagram showing another correction method in the case where it is not correctly recognized.

FIG. 9 is a diagram showing a character recognition device capable of correcting erroneously recognized characters.

FIG. 10 is a diagram showing a conventional technique.

FIG. 11 is a diagram showing another conventional technique.

[Explanation of symbols]

1 ... Input unit, 2 ... Feature extraction unit, 3 ... Standard pattern storage unit, 4 ... Recognition unit, 5 ... Dot pattern generation unit, 6 ... Character pattern storage unit, 7 ... Display control unit, 8 ... Display unit.

Claims (9)

[Claims] 1. A means for inputting a character pattern, a characteristic extracting means for extracting a characteristic pattern from the input character pattern, a standard pattern storing means for storing a standard characteristic pattern in advance, and the extracted characteristic pattern. In the character recognition device including a recognition unit that selects a candidate as a recognition result of the character pattern from the standard pattern by collating the standard pattern, and a display unit that displays the recognition result, the recognition result from the recognition unit is When not obtained, the display means displays the above character pattern instead of the recognition result. 2. A means for inputting a character pattern, a feature extracting means for extracting a feature pattern from the input character pattern, a standard pattern storing means for storing a standard feature pattern in advance, and the extracted feature pattern. In the character recognition device including a recognition unit that selects a candidate as a recognition result of the character pattern from the standard pattern by collating the standard pattern, and a display unit that displays the recognition result, the input character pattern is A character pattern storage means to hold, a dot pattern generation means to convert the recognition result into a dot pattern for display, and a display pattern is read from the character pattern storage means according to the number of candidates as a recognition result. Means or display the display pattern from the dot pattern generating means. Character recognition apparatus characterized by comprising a control means for selecting whether to display the serial display means. 3. The control means reads out the display pattern from the dot pattern generating means when the recognition result is obtained, and reads out the display pattern from the character pattern storage means when the recognition result is not obtained. The character recognition device according to claim 2, wherein the character recognition device displays the character on the display unit. 4. The character recognition device according to claim 2, wherein the control means reads out the display pattern from the character pattern storage means and displays it on the display means when the number of candidates as the recognition result is plural. .. 5. An instruction means for instructing the character pattern portion displayed on the display device, and a correction means for re-inputting the character pattern when instructed by the instructing means. Item 2. The character recognition device according to item 2. 6. As a result of recognizing the instructing means for instructing the character pattern displayed on the display device and the character pattern instructed by the instructing means, when the number of candidates is plural, the plural candidates are selected. The character recognition device according to claim 2, wherein the character recognition device is displayed and a correct result is selected from the displayed results. 7. A means for inputting a handwritten character, a feature extracting means for extracting a feature pattern from the entered trajectory as a character pattern, a standard pattern storage means for storing a standard feature pattern in advance, and the above extraction. A recognition means for selecting a candidate as a recognition result of the character pattern from the standard pattern by comparing the characteristic pattern with the standard pattern, and a dot pattern generation means for converting the recognition result into a dot pattern for display, In a character recognition device equipped with a display unit that displays the recognition result and is integrated with a unit for inputting the handwritten character, the input character pattern is immediately displayed, and a candidate as a recognition result is obtained from the character recognition unit. Read the display pattern from the dot pattern generating means instead of the character pattern. To display it, the recognition result as when the candidate is not obtained in the character recognition apparatus characterized by comprising control means for keep displaying the above character pattern. 8. An apparatus comprising: an instruction means for instructing the character pattern displayed on the display device; and a correction means for re-inputting the character by handwriting when instructed by the instructing means. Item 7. The character recognition device according to item 7. 9. As a result of recognizing the character pattern instructed by the instructing means for instructing the character pattern displayed on the display device and the character pattern instructed by the instructing means, when there are a plurality of candidates, the plurality of candidates are selected. 8. The character recognition device according to claim 7, wherein a correct result is displayed and one of the displayed correct results is selected from the instructing means.