JPS6055481A - Pattern recognizing device - Google Patents

Abstract

PURPOSE:To improve the recognition rate of a similar pattern by adding the character code of the dictionary pattern of a category selected by a candidate selecting method during correcting operation based to the dictionary pattern of a category as the 1st candidate. CONSTITUTION:When the 1st candidate character is wrong, a candidate selecting circuit 9 uses temporary codes corresponding to input characters, one to one, to read the 2nd and succeeding candidate characters out of a candidate storage circuit 10 and display them. When some character code is selected among them, the selected character code and temporary code are sent to the next associative code setting circuit 11. The associative code setting circuit 11 reads the position of the 1st candidate dictionary item out of a dictionary item position storage circuit 12 on the basis of the temporary code, and set the associative character code part of the corresponding dictionary item to the selected character code. Then when this dictionary item becomes the 1st candidate, this selected character code is displayed as the 1st candidate.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) The present invention relates to a pattern recognition device that improves recognition rate by automatically correcting the order of recognition candidates.

(B) Prior Art and Problems Conventional pattern recognition has a problem in that if the ability to identify similar patterns is insufficient, the same category may be mistakenly recognized as a different category many times. For this reason, in the past, patterns unique to each individual were registered as needed,
A method of changing the dictionary itself was considered, but this had the following drawbacks.

■) The operation of registering personal patterns is cumbersome.

2) In many cases, the size of the dictionary increases and the recognition time increases accordingly.

3) Discrimination between similar categories is essentially difficult, and even if G'S personal patterns are registered, the possibility of misrecognition cannot be avoided.

(C) Purpose of the Invention In view of the above-mentioned drawbacks, the purpose of the present invention is to improve the recognition rate by automatically changing the order of recognition candidates in subsequent recognition by reflecting the work of correcting recognition results by candidate selection. An object of the present invention is to provide a pattern recognition device that can improve the performance.

(D) Structure of the Invention And, this purpose is to collate an input unit into which a recognition target pattern is input, a dictionary storing dictionary patterns to which character codes are added, and the recognition target pattern and the dictionary pattern. a matching unit that outputs codes corresponding to a plurality of dictionary patterns obtained through the above process in descending order of similarity; and a character code corresponding to the dictionary pattern determined to have the highest degree of similarity by the matching unit as a recognition result. Correction to correct and input a character code other than the character code corresponding to the dictionary pattern determined to be the most similar among the character codes outputted from the output unit and the matching unit as the recognition result for the recognition target pattern. The recognition device includes a means for adding the corrected input character code to the dictionary pattern determined to have the highest degree of similarity as an associative character code, and wherein the output unit If an associative character code is assigned to a dictionary pattern that is determined to have the highest degree of similarity by the department, a pattern recognition device is provided, comprising means for outputting the associative character code as a recognition result. This is achieved by providing

(E) Embodiments of the Invention In the present invention, conventionally, when an input pattern is erroneously recognized due to the presence of a dictionary pattern of a similar category, the dictionary pattern is used to recognize the same category again, rather than being used to recognize the original category. Considering that this is more likely to be the cause of recognition, the category turn selected during the modification process by candidate selection is selected with the highest degree of similarity to the dictionary pattern of the first candidate category for the input cover turn. In this case, the dictionary pattern category of the given character code is output as the first candidate.

Embodiments of the pattern recognition device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram of a pattern recognition device for explaining this embodiment, and FIG. 2 is a diagram for explaining the structure of dictionary items stored in the η dictionary.

In the figure, reference numeral 1 denotes a tablet, in which a pattern of characters to be recognized is input from a pattern input area 1-1 using a tablet pen 13, and a recognition result is input from a selection instruction area 1-2 by a pattern matching circuit 4, which will be described later. The user inputs information indicating which of the plurality of candidates displayed on the display section 8 is legitimate.

First, data input from the tablet 1 is converted by the input interpretation circuit 2 into character input data and other control signals such as display of primary candidates for candidate selection. The character input data is assigned a virtual code (temporary code) that corresponds one-to-one to the input character by the temporary code setting circuit 3, and becomes input character pattern data. The pattern match circuit 4 calculates the degree of similarity between the input character pattern data and dictionary items stored in the dictionary 5, and the result is sent to the next sorting circuit 6.

Here, each dictionary item stored in the dictionary store 5 has an area C7 where dictionary pattern information is stored as shown in FIG. The area C in which the character code shown is stored and the dictionary pattern information are selected as the first candidate,
An area C in which a character code (referred to as an associative character code) attached to the dictionary pattern information of the n-th candidate is stored when the n-th candidate is selected during subsequent candidate selection.
In the initial state, the associative character code area C2 stores the same character code as the original character code stored in the area CI. For the dictionary items sorted by the sorting circuit 6 in descending order of similarity, the next candidate correction circuit 7 determines final candidate character codes as follows.

(11 Let the associative character code of the first candidate dictionary item be the first candidate character code.

(2) The original character code of the first candidate dictionary entry is set as the second candidate character code.

(3) Similar operations can be repeated for the second, third and subsequent dictionary items. However, if the same character code has already appeared, the following candidates are moved up. Note that the associative character codes of each candidate may be all the same as the original character code, so the operations in (11 to (3) above) may not be performed. The character code is sent to the candidate storage circuit 10 along with the temporary code.The position of the first candidate dictionary item is also sent to the dictionary item position storage circuit 12 along with the temporary code and stored. The character code is sent to the display section 8 and displayed.

Here, if the first candidate character displayed on the display unit 8 is incorrect, the candidate selection circuit 9 uses the corresponding temporary code in response to the candidate selection operation from the tab reso l-1.
Candidate characters subsequent to the second candidate are retrieved from the candidate storage circuit 10 and displayed on the display section 8. When a certain character code is selected from among these, the selected character code and temporary code are sent to the next associative code setting circuit 11. The associative code setting circuit 11 obtains the position of the first candidate dictionary item from the dictionary item position storage circuit 12 from the temporary code, and sets the associative character code portion of the corresponding dictionary item to the selected character code.

Thereafter, if this dictionary item becomes the first candidate again, the selected character code is displayed as the first candidate by operation of the candidate correction circuit 7.

(F) As described in detail of the invention, according to the present invention, even when identifying similar patterns, candidates are automatically corrected and output, so the recognition rate can be improved. .

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a pattern recognition device, and FIG. 2 is an explanatory diagram of the structure of dictionary items. In the figure, 1 is a tablet and 2 is an input interpreter. 3 is a temporary code setting circuit, 4 is a pattern matching circuit,
5 is a dictionary, 6 is a sorting circuit, 7 is a candidate correction circuit,
8 is a display unit, 9 is a candidate selection circuit, 10 is a candidate storage circuit,
11 is an associative code setting circuit. 12 is a dictionary item position storage circuit.

Claims (1)

[Claims] An input section into which a pattern to be recognized is input; a matching section which stores dictionary patterns to which character codes are attached and outputs corresponding character codes in descending order of similarity; G) an output unit that outputs a character code corresponding to the dictionary pattern determined as a recognition result; and a character corresponding to the dictionary pattern determined to have the highest degree of similarity among the character codes output from the matching unit. A recognition device comprising: a correction input section for correcting and inputting a character code other than a code as a recognition result for the recognition target pattern, the correction input unit converting the corrected input character code to the dictionary pattern determined to have the highest degree of similarity; a means for assigning an associative character code to a dictionary pattern determined by the collation unit as an associative character code, and when an associative character code is assigned to a dictionary pattern determined to have the highest degree of similarity by the matching unit, the output unit recognizes the associative character code. A pattern recognition device comprising: means for outputting a result.