JPS61193282A - Hand-written character recognizing device - Google Patents

Abstract

PURPOSE:To enable correct recognition regarding character input thereafter by freshly registering input pattern in case of mis-recognition when a character is inputted. CONSTITUTION:When 'OO' 'SAKA' are written in the character writing area T1 and when the order of stroke of the input character is wrong, or when the character is of style peculiar to the writer causing mis-recognition, e.g. in case 'SAKA' is recognized as 'NUKU', a character pattern of input character 'SAKA' mis-read as this writer's character 'NUKU' is freshly registered. This procedure is designated with a pen in the area T2 of the tablet 1 designating registration mode, and after setting to registration mode, character code in inputted by designating with a pen, hexadecimal number from O-F, the character code to be designated in the character code designation area T0. When the JIS code is not matched therewith, the writer is informed by display and re-inputted with the character code.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Field of Industrial Application The present invention relates to a character recognition device capable of recognizing handwritten characters.

口）Conventional TechnologyJapanese Today, as word processors and personal computers become more commonplace, there are some people who are not accustomed to keyboard operations or who do not like keyboard operations. Handwritten character recognition devices have recently begun to be commercialized as Japanese input devices for such people that do not require much skill, and research has become active. For details, see article 1 in the May 5th issue, ``Online handwritten kanji recognition moving toward easing handwriting restrictions such as broken characters''.

213U shows a configuration diagram of a conventional handwritten character recognition device. In the figure, (1) is a tablet section for inputting characters, and its coordinate position is detected by pen pressure, electromagnetic induction, etc. (
2) is an input unit that receives input from the tablet unit (1);
(3) is an input buffer that temporarily stores input coordinate data. This input coordinate data is subjected to feature extraction by a feature extraction section (4), and its character pattern is stored in an input pattern buffer (5). (6) is an identification unit which compares the input pattern with the standard pattern corresponding to the number handwriting character in the reference pattern memory (7) and outputs the character hood corresponding to the most similar standard pattern, that is, the pattern recognize. (8) is a display section, which displays the character in response to the character code from the identification section (6) and informs the writer.

Here, an example of the reference pattern memory (7) is shown in FIG. In the memory (7) in the figure, data representing a standard pattern, such as coordinate data obtained by analyzing handwritten characters of a large number of people, and character hoods are stored in association with each other.

C) Problems to be Solved by the Invention The conventional handwritten character recognition device as described above compares an input pattern of input characters with pre-stored standard patterns, and determines which pattern among them corresponds to the input pattern. Since only dolphins are identified and judged, if the stroke order is different or if the characters have a unique character, there will be a large error with the standard character pattern, resulting in erroneous recognition.

2) Means for solving the problem The handwritten character recognition device of the present invention is provided with a character pattern registration means for registering the writer's own character pattern in addition to the standard pattern, and refers to the writer's own character pattern that has been registered. It recognizes input patterns.

(e) Effect: According to the present invention, by newly registering an input pattern in the case where a character is erroneously recognized when inputting a character, the character will be correctly recognized in subsequent inputs.

f) Embodiment FIG. 1 shows a block diagram of an embodiment of the handwritten character recognition device of the present invention. In this figure, blocks that are the same as those of the conventional device in FIG. 2 are given the same reference numerals as in FIG. 2. The difference between the device of the present invention shown in the figure and the conventional device is in the reference pattern memory (70), that is, the standard pattern storage area (71) of the ROM configuration of the memory (70) contains the reference pattern memory of the conventional device. Similar to (7), the standard pattern of handwritten characters is stored in association with the character code, but the registered pattern storage area of the RAM configuration of the memory (70)
72), the input pattern in the input pattern buffer (5) is stored as a registered pattern that should be referred to as it is, in association with the character code of the input character at that time. do. To specify the character hood corresponding to the input pattern,
In the case of such an embodiment, the operation is performed by inputting numbers from the tablet unit (1), as will be described later.

Next, the operation of the apparatus according to the embodiment of the present invention shown in FIG. 1 will be described in detail with reference to FIGS. 4 to 6. First, Figure 4 shows the display section (
This diagram schematically shows the instruction area of the tablet unit (1) equipped with When the input coordinate data is transferred from the input section (2') to the input buffer (
3), and the character pattern extracted by the feature extraction unit (4) is stored in the input pattern buffer (5). Then, all the reference patterns in the reference pattern memory (70), however, the first one is in the registered pattern storage area (72).
Since nothing is registered in the standard pattern storage area (71), the identification unit performs pattern recognition substantially based on each standard pattern in the standard pattern storage area (71). However, due to the stroke order of the input characters being different or the characters having a peculiar character unique to the author, erroneous recognition occurs, and for example, r is not written as "excluded".
If it is erroneously recognized as such, as shown in FIG. 5, the display section (8) will display ``1 large'' r omitted. It should be noted that a part of the display section (8) in the same figure is graphically displayed to indicate the input mode.

Here, a new character pattern for the input character ``Saka'' that can be mistakenly recognized as the author's character ``Nuki'' is registered. The procedure is
Area (T) of the tablet section (1) that specifies the registration mode
2) Specify with a pen, set to registration mode, and then O-F
Input the character hood, specifically the JIS hood, by specifying the character hood designation area (T3) in hexadecimal digits with a pen. This JIS hood is applied from the input section (2) to the display section (8), and as shown in Fig. 6, a display corresponding to the input character hood "1" is displayed on the display section (8) as shown in Fig. 6. If the code is incorrect, I will know from the display and re-enter the code. In addition, the display part (8
) indicates the registration mode. Once you have confirmed that the correct character hood has been input in this way, point the execution area (T4) of the tablet section (1>) with the pen.This allows the input section (2') to move into the reference pattern memory. A write signal is given to the registered pattern storage area (72) of (70), and the input pattern at this time stored in the input pattern buffer (5) and the specified character hood are associated with each other and the registered pattern is stored. Area (72
). When the character pattern registration is completed in this way, the input mode is returned to at the same time.

Therefore, in the subsequent input mode, pattern recognition can be performed by referring to the pattern in the registered pattern storage area (72) in addition to the pattern in the standard pattern storage area (71) of the reference pattern memory (70). There is no risk of erroneously recognizing characters that have been registered once as described above, and it is sufficient to first perform the registration process as described above for each newly erroneously recognized character.

G> Effects of the Invention As is clear from the above description, the handwritten character recognition device of the present invention uses the writer's own character pattern in addition to the standard pattern to perform pattern recognition processing on an input pattern obtained by patterning input characters. As a result, misrecognition can be eliminated and handwritten characters can be input reliably, and the input speed can also be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the handwritten character recognition device of the present invention, FIG. 2 is a block diagram showing the configuration of a conventional device, FIG. 3 is a memory diagram of the conventional device, and FIG. 4 is a block diagram showing the configuration of a conventional device. FIG. 6 is a schematic diagram of the main part of the present invention. (1)...Tablet part, (2)(2')...Input part, (3)...Input buffer, 4)...Feature extraction part, (5)...Input pattern buffer , (6〉...
ID5J+Jm, (7) (70)...Reference pattern memory, (8)...Display section, (71)...Standard pattern storage area, (72)...Registered pattern storage area. Figure 1 Figure 2 Figure 4 Figure 6

Claims (1)

[Claims] In a handwritten character recognition device that recognizes an input pattern formed by patterning handwritten characters based on a plurality of reference patterns stored in advance in a reference pattern memory,
The reference pattern memory is composed of a standard pattern storage area in which a standard pattern formed by patterning a plurality of standard handwritten characters is stored, and a registered pattern storage area that can be written separately from the standard pattern storage area. A handwritten character recognition device characterized in that a character pattern registration means is provided for storing a registered pattern of a writer's handwritten characters in a storage area.