JPH0554186A - Optical character reader - Google Patents

Abstract

PURPOSE:To resolve a subject that a character comes to be reading impossible by the occurrence of a position deviation between the character position of copy result and a slip character frame at the time of reading the copied character on a second and succeeding slips. CONSTITUTION:A reading reference mark segmenting part 13 executing reading from an input image data and segmenting a reference mark and a compensating part 14 compensating the reading character position from the position of the segmented reading reference mark are provided. Thus, the reading impossible character due to the position deviation is relieved and a character reading rate is remarkably improved.

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 an optical character reading device for recognizing characters written on the second and subsequent sheets of a copy form.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, an optical character reading apparatus of this type has a form length M1, positions M2 and M3 of a character frame W printed on a form, and a size M4 of the character frame W. ,
The information of M5 is given, and the character position is set based on this information to recognize the character.

[0003]

However, in this conventional optical character reading device, since only the information on the character position in the form is given, when the characters on the second and subsequent sheets of the copy form are to be recognized, copying is performed. If the character positions of the first copy form and the second copy form or later, which is the copy result, are shifted when the characters are entered in the form, the character position information and the position difference of the first copy form given to the device will be misaligned. However, there is a problem that the characters cannot be read.

The present invention has been made in view of the above-mentioned conventional circumstances, and therefore, an object of the present invention is to provide a novel optical character reading device capable of solving the above problems inherent in the prior art. To do.

[0005]

In order to achieve the above object, an optical character reading apparatus according to the present invention comprises a preprocessing section for recognizing a reference side of a form from a pattern of input image data,
A reading reference mark cut-out portion that marks the reading reference mark copied when the character is entered on the copying form and cuts the reading reference mark copied on the second and subsequent sheets of the copying form from the reference side, and the reading reference mark of the first copy form that is set in advance. And a correction unit that corrects the read character position based on the error between the position and the read reference mark position cut out by the read reference mark cutout unit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the accompanying drawings with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of an optical character reader according to the present invention.

In the figure, reference numeral 11 is an input section for inputting character image data from a form, and 12 is a preprocessing section for recognizing the reference side of the form from the image data by inputting the character image data from the input section 11. Reference numeral 13 denotes a read reference mark cutout portion for cutting out a read reference mark from the reference side recognized by the preprocessing portion 12, and reference numeral 14 denotes a read reference mark position cut out by the read reference mark cutout portion 13 and a preset read reference mark position. A correction unit for correcting the character position of the read character by obtaining an error between the read character, a recognition unit for recognizing the character cut out from the image data having the character position corrected by the correction unit, and a recognition result by the recognition unit 15. The output unit 17 outputs the input unit 11, the preprocessing unit 12, and the reading reference mark cutting-out unit. Part 13, the correction unit 14, recognition unit 15,
The control part which controls each output part 16 is shown, respectively.

Next, the operation of recognizing the character after correcting the character position in the character recognition of the second sheet of the copy form will be specifically described.

When the positions M2 and M3 of the character frame W and the reading reference mark positions L3 and L4 are given to the apparatus in advance as the character positions of the copy form as shown in FIG. 3, the characters are copied at the time of copying as shown in FIG. 2B. In the case of recognizing the second character of the copy form that has been misaligned, from the form image data input to the input unit 11 of FIG. 1, the part where the image patterns are connected by the black mesh in the preprocessing unit 12 is excluded from the form. The boundary between the black mesh and the white mesh in the upper part of the form image data is recognized as the reference side 1, and the boundary between the black mesh in the right part of the form image data and the white mesh is recognized as the reference side 2. Next, in the reading reference mark cutting section 13, the reading reference mark position L given in advance is calculated from the reference sides 1 and 2 recognized by the preprocessing section 12.
3, the read reference mark K after copying which is close to L4 and approximates the size of the read reference mark Y given in advance.
Cut out. Next, in the correction unit 14, the difference L1 and L2 between the position of the reading reference mark K cut out in the reading reference mark cutting unit 13 and the position of the reading reference mark Y given in advance is obtained, and the copy form character given in advance is obtained. The second copy sheet in which the position of the character is shifted during copying by reading the positions M2 and M3 of the character frame W as positions and correcting the positions by the differences L1 and L2 between the position of the reference mark K and the read reference mark Y. Character position M2-
L1 and M3-L2 are required. Required character position M
The recognition unit 16 recognizes characters from 2-L1 and M3-L2, and the recognition result is output from the output unit 17.

[0011]

As described above, according to the present invention,
In an optical character reading device that recognizes the characters written on the second and subsequent sheets of a copy form, it was conventionally impossible to read the characters due to the misalignment of the characters during copying. Mark the mark, when reading the character, the read character position is corrected from the difference between the position of the read reference mark of the input data and the position of the read reference mark that is given in advance, so the unreadable character is sought, The effect of significantly improving the reading rate of characters can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an optical character reading device according to the present invention.

FIG. 2 is an explanatory view showing an example in which the characters are misaligned on the second copy form when the characters are entered on the copy form, where (a) is the first copy form and (b) is the second copy form. Is.

FIG. 3 is an explanatory diagram showing an example of a reading reference mark position and a character frame position which are given in advance, and a reading reference mark position and a corrected character frame position of a form in which a character position shift occurs at this time.

FIG. 4 is an explanatory diagram showing an example of character position information in a general optical character reading device.

[Explanation of symbols]

 Reference numeral 11 ... Input section 12 ... Preprocessing section 13 ... Read reference mark cutout section 14 ... Correction section 15 ... Recognition section 16 ... Output section 17 ... Control section Y ... Read reference mark K ... Read reference mark after copying L1, L2 ... Y Positional difference between K and W ... Character box for entering characters to be read

Claims (1)

[Claims] 1. An optical character reading device for recognizing characters on the second and subsequent sheets of a copy form, and a preprocessing unit for recognizing a reference side of the form from an input image data pattern, and marking when writing characters on the copy form. From the reading reference mark cutting means for cutting the reading reference mark from the reference side, and the error between the reading reference mark position of the first copy sheet and the reading reference mark position cut by the reading reference mark cutting means. An optical character reading device which corrects the character positions of the second and subsequent copies of a copy form.