JPS584489A - Detecting system for end of document - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting the side edge position of a form in an optical character reading device or the like.

Generally, in an optical character reading device, a form is run, the direction perpendicular to the form running direction is the main scanning direction, the direction opposite to the form running direction is the sub-scanning direction, and the main scanning direction is from one side edge of the form to the other side. After scanning a certain range that completely includes one line of characters in the sub-scanning direction, converting the image into binary information Tlc and storing it in the -tan image memory, one character's worth of characters is scanned from this image. The image is cut out, and in order to facilitate the recognition work described later, the image is cut out, and the features of the cut-out selfishness are extracted, which are then memorized in advance and compared with seven reference patterns. ◎ If the form does not travel in the correct position but is offset to one side, an error will occur in the cutout position of each O, so measure the amount of deviation of the document. , By this, the position O is cut out and the position O is adjusted to -J to 1. In one measurement of the quantity i, the change in the book II due to temperature etc. is also taken into consideration. ◎ Conventionally, the measurement line at the O side edge position of this form, J
This is done by storing a certain range containing one line of characters in the image memory, and then checking the stored contents of the iI image for one scan on the image memory.

Recently, perforated and separated forms are often used (the edges of such forms have irregular parts 3 with regular pitches and a constant width, as shown in Figure 1) occurs, ζ
O Irregular part 3 There are many convex ridges, and the height can reach up to 2.

This rounding causes a difference in the measured value Kfla of the position of the side edge of the form O, and the stroke lIO cutout for one character is not accurately ζ.
Therefore, there was a problem that the characters were not read accurately.

The present invention has been made to solve such problems, and its purpose is to maintain the position of the side edge of the form even if there is an irregularity due to perforation on the side edge of the form.
The objective is to obtain an optical character aIIIL device that can accurately set and read characters.The ninth step to achieving the above purpose is to intersect the direction of relative movement of the relatively moving form. In the case where the side edge position of the form is measured from the armpit image by obtaining an image of the form by arranging the detectors as shown in the figure and scanning with the insole detector, the majority vote of each measurement value is obtained by scanning three or more times. The invention is characterized in that the position of the side edge of the mosquito net system is determined by majority vote.Hereinafter, the present invention will be explained in detail with reference to an embodiment.〇Figure 2 shows the configuration and function of an embodiment of the present invention. It is a block diagram. The scanning unit 2o has a main scanning direction that is perpendicular to the scanning direction of the form 10C, and a sub-scanning direction that is opposite to the scanning direction of the form.
In the main scanning direction, from one ohm of the form to the other @ end,
A certain range completely including one line of characters in the sub-scanning direction Ka is scanned, and the image is converted into binary information KW and stored in the image memory 40 via 3G. The microprocessor 50 confirms that the scanning section has scanned the predetermined range and then outputs the image memo 40 (D) to the gate 30.
At the same time, the form running motor 70 is stopped via the form running control unit 60 to stop the running of the form JIIIO. ◎The scanning unit 20 has 2048 photodetecting elements arranged in a one-dimensional manner. The maximum scanning length is 215-, so the length of the form running surface in the main scanning direction of 0.105- corresponds to one photodetecting element. Also, the sub-scanning is 0.
Therefore, the image of the document scanning range is divided into squares of 0.105 square meters, and each O1 section is stored in each 1 bit of the image memory 40.0 The document side edge position O measurement is as follows. Let's do a form scan! After the image of I is stored, it is carried out by the image memory 4° and the microprocessor 50.

Figure 3 is a diagram showing how an image of the scanning range of a welfare form lO is stored in the image memory 40 and how the microprocessor 50 examines this to measure the position of the side edge of the form.

The constant position of the side edge of the form is the reference edge YY' and 1 forward and backward from this point.
This is done for both the image memories of xX' and zz' separated by g scanning, and at the left end of the form, the memory contents of the image memo are scanned and the 4B and CO positions are determined respectively for X person, YB,
and zC, and in the example shown, XA=ZC+
Since it is YB, XA±zC is determined as the left end position of the form by majority vote. As mentioned above, the pitch between XX' and YY' and YY' and ZZ/ is equivalent to 18 scans, but when converted to the length on the form, it is 0.105 smX 18-1.
The image memory of 0, XX', YY', and zz', which is 811-, was detected by a detector with a detection width of 0.105-. In other words, the constant position of the side edge of the form by the microprocessor SDK described above is equivalent to scanning the form three times at a pitch of 1.89 using a detector with a detection width of 0.105 m. In the example, the width of the irregular part 3 at the side edge of the form is I'm, and the arrangement pitch of the irregular part 3 is 6 square meters. Therefore, the scanning pitch of the detector (1.89 mm) is the irregularity O@ plus the detection width of the detector IZ) (1■+0.
105 ■ - 1,105 parts) (and the width of the irregular part and the detection width of the detector are subtracted from the arrangement pitch of the irregular part) O (6
-l■-0,10lm=4.895■)] Short 0 Therefore, in Fig. 3, one of XX', YY', and zz' is defective at each side edge of the form. Although two or more wires may pass through the irregular portion 3 at the same time, two or more wires may not pass through the irregular portion 3 at the same time.As explained above, according to the present invention, there are irregular portions created by perforation on the edge of the form. ) has the effect of accurately measuring the position of the side edge of the form◎

[Brief explanation of the drawing]

Fig. 1 is an enlarged view of a form with irregularities at the edges, Fig. 2 is a plot diagram showing the configuration and function of embodiment O of the present invention, and Fig. 3 is an explanatory diagram of the actual @O embodiment. Inside, 10 is a form, 20 is a scanning unit, 30 is a game), 4 (1 image memory, 50 is an electronic processor, 60 is a form travel control unit, and 70 is a form feeding motor.) 2 Tomoe 0

Claims (1)

[Claims] A detector is placed so as to intersect the direction of relative movement of the relatively moving form, and the side edge position of the form is fixed from the image of the side of the form by means of the 0x inspection by the yaw detector. In this method, a form side edge detection method is provided in which means is provided to take a majority vote for each fixed value by scanning three or more times, and the position of the wrinkled mollts is determined by the majority vote. −