JPH04319790A - Optical character reader - Google Patents

Abstract

PURPOSE:To prevent the reading inability and the erroneous reading by being equipped with a means to preparing a slip classification dictionary in accordance with the result to correct the reading inability character and an erroneous reading character and a means to select and control the slip classification dictionary in correspondence to the reading slip. CONSTITUTION:A standard dictionary 8 reads a common character pattern between slips. A slip classification memory 6 reads a character pattern different by the kind of the slip. In the slip classification memory 6, the information whether or not the dictionary corresponding to the slip during reading presently is prepared in a slip classification dictionary 9, that is, the information whether or not the slip classification dictionary 9 is collated and decision is performed is stored. A registering control part 7 refers to the slip classification code of data 301, stores the corrected result of the inability character and the erroneous reading character and the character pattern for each slip type, prepares the dictionary for each slip and registers the dictionary prepared to the slip classification dictionary 9. By selecting and controlling the slip classification dictionary 9 in correspondence to the reading slip, the dictionary can be automatically prepared for each type of the slip.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical character reading device, and more particularly to a dictionary registration device for creating dictionaries corresponding to forms written by different persons.

0002

[Background Art] Conventionally, when reading characters written on a form, an optical character reading device obtains the reading result by comparing and comparing the character pattern to be read with a standard dictionary created in advance. .

0003

SUMMARY OF THE INVENTION The conventional optical character reading device described above performs a reading operation by checking a standard dictionary prepared in advance. This has the disadvantage that similar character patterns may have different meanings depending on the person writing them, leading to misreading.To reduce misreading, all similar character patterns are made unreadable.

[0004] This will be explained in detail using FIG. 2.

As shown in FIG. 2, character 2 of the form 21
3 and the character 28 of the form 22 are examples of writing different characters, but the character patterns are extremely similar, so
If the character 23 on the form 21 is read as "4", the character 28 on the form 22 may also be read incorrectly as "4". Character patterns that are similar in this way are generally both unreadable.

[0006] Furthermore, regarding the automatic learning function that automatically improves the accuracy of the standard dictionary based on the results of unreadable or misreading corrections made by the operator, a standard dictionary is created in common between forms. When characters are read by an unspecified person, there is a problem, as described above, in that different characters with similar character patterns are misread.

[0007] Generally, in optical character reading devices intended for an unspecified number of users, the shape of the characters entered often differs depending on the type of form. That is, Figure 2
As shown, character 23 of form 21 and character 2 of form 22
7 has the same "4" written in, but the character patterns 25 and 29 are different because the person filling it in and the type of form are different. Similarly, the character patterns 26 and 30 of the character 24 of the form 21 and the character 28 of the form 22 are different.

[0008] Furthermore, even if different characters are entered, such as the character 23 on the form 21 and the character 28 on the form 22, the character patterns 25 and 30 are extremely similar when the type of form and the person filling in the form are different. , and it is rare within the same document. In other words, within the same document, character 2 of document 21
The characters "4" and "9" are often written separately, such as characters 3 and 24 and characters 27 and 28 on the form 22.

[0009] As described above, the same character may have different fonts among a plurality of different types of forms, or the fonts of different characters may be similar between forms. Within the same form, different character shapes are entered so that they can be clearly distinguished. However, since conventional character reading devices perform reading using a standard dictionary that is common to different types of forms, it is not possible to change the range of glyphs to be read depending on the type of form, so it is difficult to reduce unreadability and misreading. The disadvantage is that it cannot be done.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical character reading device that eliminates such drawbacks and prevents unreadable characters and erroneous readings.

[0011]

[Means for Solving the Problems] The optical character reading device of the present invention has a standard dictionary means for storing a standard dictionary for reading character patterns common between forms, and a form-specific dictionary for reading character patterns that differ depending on the type of form. According to the results of correcting unreadable characters and misread characters determined by comparing the stored form-specific dictionary means with the standard dictionary of the standard dictionary means and the form-specific dictionary of the form-specific dictionary means, the form-specific dictionary is changed to the form-specific dictionary means. It has a creation means for creating, and a control means for selecting and controlling a form type dictionary corresponding to the form to be read.

[0012] In the present invention described above, it is preferable that the standard dictionary means extracts and reads out a character pattern for each character.

Further, in the present invention described above, it is preferable that the creation means gives priority to the collation results by the form-specific dictionary of the form-specific dictionary means.

[0014]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The optical character reading device shown in FIG. A type dictionary 9 is also provided.

The recognition unit 1 optically scans the characters written in the reading area on the form, cuts out the character pattern of each character, and compares the extracted features with the standard dictionary 8 to obtain the primary judgment result. and the character pattern as data 1
Output as 01.

The secondary determination control unit 2 refers to the memory 6 and
If a dictionary corresponding to the form currently being read has been created, the judgment result obtained by comparing the character pattern of the data 101 with the form type dictionary 9 is compared with the primary judgment result of the data 101, and the second judgment result is compared. The next determination result, character pattern, and form type code are output as data 201.

The correction unit 3 refers to the memory 4 and edits the data 20.
Controls the corrective action of 1.

The memory 4 stores information for determining execution/non-execution of correction of read data through secondary determination.

The memory 6 stores information as to whether or not a dictionary corresponding to the form currently being read has been created in the form type dictionary 9, that is, information as to whether or not to check the form type dictionary 9 to make a determination. do.

The registration control unit 7 refers to the form type code in the data 301, stores the correction results and character patterns for each form type, creates a dictionary for each form, and registers the created dictionary in the form type dictionary 9. do.

The standard dictionary 8 stores a dictionary for reading common character patterns among forms.

The form type dictionary 9 creates a dictionary that reads different character patterns depending on the type of form.

Next, the operation of this embodiment will be explained.

The standard dictionary 8 stores a dictionary for reading common character patterns among forms. The recognition unit 1 optically scans the characters written in the reading area on the form, cuts out the character pattern for each character, and compares the extracted features with the standard dictionary 8 to obtain the primary judgment result. The character pattern is output as data 101. The memory 6 stores information as to whether or not a dictionary corresponding to the form currently being read has been created in the form type dictionary 9, that is, information as to whether or not to perform a determination by comparing the form type dictionary 9. has been done.

The secondary determination control unit 2 refers to the memory 6 and
If a dictionary corresponding to the form currently being read has been created, the judgment result obtained by comparing the character pattern of the data 101 with the form type dictionary 9 is compared with the primary judgment result of the data 101. , the secondary determination result, character pattern, and form type code are output as data 201. Further, the secondary determination control unit 2 refers to the memory 6, and if a dictionary corresponding to the form currently being read has not been created, it adds a form type code to the data 101 and outputs it as data 201.

Table 1 shows the relationship between the primary determination result, the determination result based on the form type dictionary 9, and the secondary determination result in the secondary determination control section 2.

[Table 1]

[0028]

As shown in Table 1, if either the primary determination result or the determination result from the form type dictionary 9 is unreadable, the one that can be read is taken as the secondary determination result. Further, if the primary determination result and the determination result by the form type dictionary 9 are different, the determination result by the form type dictionary 9 is determined as the secondary determination result. If both the primary judgment result and the judgment result by the form type dictionary 9 are unreadable,
Make the secondary judgment result unreadable.

The memory 4 stores information for determining execution/non-execution of correction of read data by secondary determination. The modification unit 3 refers to the memory 4 and controls the modification operation of the data 201. That is, if no modification is to be performed, the data 201 is output as is to the output unit 5. When performing correction, the secondary judgment result and character pattern of the data 201 are displayed, the operator corrects misread characters and unreadable characters, outputs the correction result and character pattern to the output unit 5, The correction result, character pattern, and form type code are output to the registration control unit 7 as data 301. The registration control unit 7 refers to the form type code in the data 301, stores the correction results and character patterns for each form type, creates a dictionary for each form, and registers the created dictionary in the form type dictionary 9.

In this manner, it is possible to create a dictionary in the form type dictionary 9 that reads different character patterns depending on the type of form.

[0032]

[Effects of the Invention] As explained above, the present invention provides a standard dictionary that reads common character patterns between forms, a form-specific dictionary that reads character patterns that differ depending on the type of form, and corrects unreadable characters and misread characters. By providing means for creating a form type dictionary according to the results of the reading, and means for selecting and controlling the form type dictionary in accordance with the read form, it is possible to automatically create a dictionary for each type of form.
Since the range of glyph shapes to be read can be arbitrarily changed according to the type of form, even if the glyph shapes of the characters entered are different, it is possible to prevent misreading of similar glyphs and reduce illegibility. has.

Furthermore, since it is possible to easily deal with writing shapes that differ depending on the type of industry or business, it is possible to provide an optical character reading device that is immediately compatible with the application business.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing the relationship between types of forms and written characters.

[Explanation of symbols]

1 Recognition part 2 Secondary judgment control section 3 Modification section 4 Memory 5 Output section 6 Memory 7 Registration control unit 8 Standard dictionary 9. Form type dictionary

Claims (3)

[Claims] Claims 1: Standard dictionary means for storing a standard dictionary for reading character patterns common between forms; form-specific dictionary means for storing form-specific dictionaries for reading character patterns that differ depending on the type of form; and standards for the standard dictionary means. A creation means for creating a form type dictionary in the form-specific dictionary means according to the result of correcting unreadable characters and misread characters determined by checking the dictionary and the form-specific dictionary of the form-specific dictionary means, and a form-based dictionary corresponding to the form to be read. An optical character reading device having a control means for selecting and controlling a type dictionary. 2. The optical character reading device according to claim 1, wherein the standard dictionary means cuts out and reads out a character pattern for each character. 3. The optical character reading device according to claim 1, wherein the creation means gives priority to the result of collation by the form-specific dictionary of the form-specific dictionary means.