JPH0239387A - Reader - Google Patents

Abstract

PURPOSE:To improve the read accuracy by providing reference marks on a business form, calculating a distance between these marks and correcting a difference between an original position on the business form of a character entry frame and a position where a registration is executed actually. CONSTITUTION:A distance L between a reference mark 1 (22) and a mark 2 (23) of a business form 1 is inputted. From a coordinate between a reference mark image 1 (24) and a mark image 2 (25) in an image memory 8 which are read, a distance L1 between them is derived. Subsequently, from a black frame image 18 of the image memory 8, a read range is designated. Next, a coordinate of the read range which has been designated is derived. Thereafter, when Y1 denotes the Y direction of a coordinate which is inputted, based on the image memory 8, Y which is derived by Y=L.Y1/L1 goes to a coordinate of the Y direction of the read coordinate of the business form 1. In such a way, a position of a read frame 10 which is corrected is determined. When other character entry frame exists, a coordinate of its read range is corrected in the same way, and a read format of the business form 1 is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reading device 4 that uses an a-reading format.

[Conventional technology]

FIG. 3 is a block diagram showing an example of an optical character reading device. In FIG. Light source, (4
) is a light sensor, and a light source (3) and a light sensor (4) constitute a scanner (5). (6) is a scanner control f device that controls scanning of the scanner (5); (7)
is a control device that converts the output electrical signal from the scanner (5) into an image pattern, and (8) is the image memo 1J1.
9J is a recognition device that determines a character code from this image pattern.

FIG. 4 is a diagram of reading format H.

In Fig. 4, 01 is a reading format stored in advance in the recognition device (9) to facilitate pattern recognition processing, and aυ is a reading frame indicating a predetermined position where a character is to be written. shows.

FIG. 5 is a flowchart showing a conventional reading format creation procedure, and FIG. 6 is a diagram for explaining the conventional reading format creation procedure. In Figure 6,
The kanji is a form for creating a reading format, and the form is +1.
1 is copied with a bond copying machine, and the color cannot be recognized by the reading device.
In other words, the character entry frame α printed in the dropout color is changed to a black frame αη instead of the dropout color.

The α ladder is read #) The black frame image corresponding to the black frame αη when the image data of Ill9 is stored in the format creation form (Image Memo January 8), and α [phase] is stored in the image memory (8). Indicates that the reading format ≠=-large is created based on the image data, and (l
υ is a reading frame created based on image data.

Qυ is the reading frame that should originally be specified.

Next, the operation of the optical character reading device will be explained using FIGS. 3 and 4.

The optical sensor (4) has a large number of photoelectric conversion elements arranged in the horizontal direction (hereinafter referred to as the X-axis direction), and measures the intensity of the reflected light from the form (1) illuminated by the light source (3). Convert to signal. That is, optical information corresponding to one raster in the X-axis direction of the form (1) is converted into an electrical signal and input to the scanner control device jl (6). The strength of the reflected light from the white part on the 1st square mark (11) is strong, and the strength of the reflected light from each point on the line of 9 characters is weak, and the strength of the output electrical signal is determined according to this strength.Scanner The electrical signals from (5) are converted into binary signals from the scanner control device (6) and the control device (7).
) and then stored in the image memory (8).

The scanner control device (6) also controls the scanner (5) to
When you finish inputting information for one raster in the axial direction.

Move the scanner (5) in the Y-axis direction perpendicular to the X-axis to input the next rask, scan the entire surface of form +11 in this way, and sequentially write the output as an image memo (January 8). Write. The address position of each bit in the image memory (8) is the form (1) of the pixel corresponding to that bit.
Corresponds to the coordinate position above.

The recognition device (9) reads each character (2) from the image memory (8).
) is read out, the characteristics of the black portion thereof are analyzed, and a character code corresponding to the image pattern is determined by a method well known in the art as pattern recognition.

On the other hand, each character is recognized separately from the image pattern in the entire area of the image memory (8), and the character is recognized from the image pattern within the reading frame αυ in which each character is written. Since it is easier to do this, the coordinate position of the reading frame (Ill) shown in FIG. Character recognition is performed by reading image patterns only within the range.

At this time, various parameters set within the reading frame αυ of the *trimming format α[ are used.

Next, the reading format creation means will be explained using FIGS. 5 and 6.

Copy form (1) with a copy machine so that the dropout color is black, and create form 09 for reading format.
Create. This is on the form (1).

Text entry frame A3 printed in dropout color
becomes a black frame αη. This reading #) Format creation j
When IQ is read with an optical character reader, the image memory (8) contains a black frame αD in addition to the image of one character.
image (1 second is also stored. This black frame image (I
8 is specified to find the coordinates of the character entry frame α2, but at this time, since the origin of the image memory (8) is used as the reference point, a deviation from the original coordinates of 9 occurs.

[Problem that the invention seeks to solve]

Since the reading device using the conventional reading format is configured as described above, the reading device can read the image based on the image read by the reading device.

The conventional method of specifying the coordinates of the reading format includes errors during copying and image reading, so the reading frame of the reading format does not correctly indicate the position of the character entry frame on the reading form. . Despite using the ``Tsumashi-reading'' format, there was a problem in that it was difficult to improve the reading accuracy.

This invention was made in order to solve the above-mentioned problems, and it is possible to obtain a reading device with high reading accuracy by aligning the reading frame of the registered reading format with the character entry frame of the actual form. The purpose is to

[Failure to solve the problem]

When creating a reading format, the reading device according to the present invention creates reference marks on the form paper, calculates the distance between these marks, and calculates the distance between the marks and the actual registered position of the 0 character entry frame on the form. This allows the difference in position to be corrected.

[Effect]

The reading device according to the present invention utilizes the fact that most errors during copying and image reading are proportional to the reading distance. That is, it compares how much the distance between two points on the form is registered after reading, and corrects the difference by proportionally distributing it to the position of each character entry frame.

[Embodiments of the invention]

FIG. 1 is a flowchart showing the read shift format creation procedure for the present invention. FIG. 2 is a diagram illustrating the reading format creation procedure.

In Figure 2, (1) is one form of slip paper, and α is one form of form.
The character entry frame on the top, @ and (to) are reference marks 1 and 2 provided for the purpose of the invention. (I41 is reference mark 1 (c),
The distance between marks 2 @, e is the document for creating the reading shift format copied by a copying machine, and ση is the document paper (1
) Text entry frame aX written in dropout color above
The character entry frame that became a black frame due to the copying corresponding to 5, (
8) is the image memory when the format creation form αe is read by the reading device, αυ is the black frame image corresponding to the character entry frame αη on the format creation form paper, @, (c) is the image memory on the image memory Reference mark images 1 and 2 corresponding to reference mark (2) (c) on form paper (1). (Ll) is the distance between reference mark image 1 (b) and mark image 2 (e), ■ is the reading frame after correction, yl is the reading coordinate, and Y is the post-correction coordinate.

The coordinates specified using the contents of the image memory (8) include errors at the time of drawing and reading. 7 in Figure 1
Correct as 0-.

(1) Create a form that does not require the creation of the a-mitori shift command. In other words, a form for creating a reading format is created.

(2) The form for creating the reading shift format in (1) (
Read the image of Le.

(3) Input the form (reference mark 14 of +1, distance (l) between marks 2q).

(4) Reference mark image 1 in read image memory (8) G! From the coordinates between 4 and mark image 2 (to), the distance (Ll) between them is determined.

(5) Specify the reading range from the black frame image in the image memo (January 8).

(6) Find the coordinates of the specified reading range.

(1) Correct the obtained coordinates as follows.

When Yl is the Y direction of the coordinates input based on the image memory (8), let Y obtained from Y--Yl be the Y-direction coordinate of the reading coordinate of the form J1 fl+. This determines the position of the corrected reading frame (■).

(8) If there are other character entry frames, modify the coordinates of these reading ranges in the same way to create the reading format for the form (1).

〔Effect of the invention〕

According to the present invention, the coordinates of the nine created read shift formats can be set at more correct positions, and high reading accuracy can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a reading format creation procedure according to the present invention, FIG. 2 is a diagram for explaining the reading format creation procedure of FIG. 1, and FIG. 3 is a block diagram showing a conventional optical reading device. Figure 4 is a diagram of the reading format. FIG. 5 is a flowchart showing a conventional read shift format creation procedure, and FIG. 6 is a diagram for explaining the conventional read format creator j10 of FIG. (1) is a form, (2) is a character, (3) is a light source, (4) is an optical sensor, (5) is a scanner, and (6) is a scanner control device. (7) is the image pattern conversion iU control device ff, (
81 is the image memo 'J19) is the recognition device, CI is the reading format, αυ is the reading frame, (one is the character entry frame (dropout color frame), afi is the form for creating the reading shift format, αn is the character entry frame ( black frame),
αS is the black frame image, ■ is the reading frame after correction, c! υ
is the reading frame that should originally be specified. Note that the same reference numerals in Figure 0 indicate the same or equivalent parts.

Claims (1)

[Claims] A reading device comprising the following means. (a) means for registering and storing in advance a reading format indicating the position of the object to be read on a form; (b) means for reading two reference marks on a form and calculating the distance between the two; (c) the above. means for inputting the distance between two reference marks on the form from outside the device; (d) when the two distances in (b) and (c) above are different;
Means for correcting the read format stored in (a) above using these two distances.