JPS58114174A - Impression reader - Google Patents

Abstract

PURPOSE:To prevent erroneous read of noise and other impressions, by comparing a measured shape with a desired shape, and storing only the impression, which is discriminated to have a desired shape, in a picture memory part. CONSTITUTION:A color TV camera 2 reads the picture of a bill 1. The electric signal of the picture read by the camera 2 is converted to a digital quantity by an A/D converting part 4. A shape measuring device 8 measures outside circumferential positions of an impression and calculates the center of the impression and its width and outputs signals indicating the center and the width to a shape signal generating device 11. In the device 11, a preliminarily stored desired shape peripheral position signal is generated on a basis of a signal 10. An impression discriminating device 9 discriminates the coincidence or dissidence of the shape on a basis of an outside circumferential position signal 13 from the device 8 and a signal 12 from the device 11. Data of an impression part for which coincidence is discriminated, out of the output of the converting part 4 is stored in a picture memory part 5. Thus, noise and other impressions are not read erroneously, and only an objective impression is read.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention belongs to a type of input device for inputting image data into a computer or the like, and relates to a seal imprint reading device for reading a seal imprinted on securities or the like.

Conventionally, a device of this type is shown in FIG. 1. In the figure, (1) is a security document being read while being conveyed by a conveyance system, +21 #: A t-beam scanning device,
1) Scan a bright spot upward perpendicular to the paper conveyance direction A.

(3) is a light receiving unit which converts the reflected light from the bright spot of the security (1) being transported into an electrical signal. (4) is an A/D conversion section, which converts the output of the light receiving section (3) into digital data. (5) stores the seal impression data extracted by the seal impression cutting section (5).

Next, the operation will be explained. The conveyance system and the securities (1) being conveyed are at a preset constant speed.

The beam scanning device (2) projects a bright spot of a predetermined size onto the security (1), such as a flying spot device, and transport direction A of securities file
and take it out in the vertical direction B at a certain fixed time. A/D
Conversion 5 (4) converts this 4Q signal into a digital quantity. The seal imprint cutting section (5) controls the output of the A/D converter (4) and collects the output of the A/D converter (4) within a predetermined reading range on the security (1). Taking the security shown in FIG. 2 as an example, this operation is performed as follows. In other words, xl and x2, which are the boundaries in the X direction of the reading range of 8kL, are set by adjusting the beam scanning device yjL +21, and Yl and Y2, which are the boundaries in the Y direction, are set by adjusting the beam scanning device yjL +21. Detect the edge E of the paper surface conveyed by the output signal, set in advance the positions Yl and Y2 correspond to the number of beam scans from this edge E, and perform A/D conversion between yl and Y2. Only the image data outputted from the section (4) is collected and stored in the image memory section (6).

Since the conventional seal imprint aJlX device was configured as described above, the seal impression must be placed in a predetermined position on the security, and in order to read multiple seal impressions from the same security, the It is necessary to set a reading JlX range with sufficient intervals for each reading, and to make sure that each mark is accurately pressed within the reading range.Also, it is impossible to remove the noise of minute marking pads within the reading range. There was a drawback.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it measures the shape of the read seal imprint, and also stores the data obtained by the measurement as shape data of the desired seal imprint stored in advance. It is an object of the present invention to provide a seal imprint reading device that is capable of detecting a seal imprint of a desired shape by comparing with the above-mentioned seal imprint and reading only the detected seal imprint.

An embodiment of the present invention will be described below with reference to the drawings. Third
In the figure, ) is the security to be read, A is the security (1
), (2) is the color television camera as a light receiving unit that converts the intensity of the reflected light from ) into a 4Q signal, (3) is If: the seal imprint on the ticket (1), ( 4) is an A/D conversion unit that digitizes the output of the television camera (2);
(8) measures the outer circumference position of the seal impression, calculates the center of the seal impression and the inside of the seal impression, and signals tl(I) indicating the center and width.
(9) a shape measuring device that outputs a shape measuring device that outputs a signal 41 (I is the center of the seal imprint, and a signal 41 (l) indicating the width of the seal imprint, and a shape signal generating device that generates a desired shape peripheral position signal that is stored in advance;
The outer periphery position signal from the shape measuring device (8) and the shape signal generator (8) indicate whether the shape matches or does not match. 4. A seal imprint determination device 4, +51 is an image memory unit that stores data of the seal imprint portion extracted by the seal imprint determination device 1t9) from the output of the A/D converter (4).

Next, the operation will be explained. The security (1) intermittently excites the document j/s in the excitation direction A at regular intervals, and the color television camera (2) performs the nth imaging M,in and Ctl+1)th time as shown in Figure j83. That technique +1+
1 and tcJIX the image of ) in such a way that part of it overlaps with n-)-1. Nine images read with a color TV camera (2)! ! A/l) converter 14) converts the signal into a digital quantity. This situation is shown in FIG. 4, and the detected surrounding positions are shown in FIG. In both figures, U(O,O) is one image captured by the color television camera (2). It is the origin of the m region, and 'n
1Xn+. .

"n+l'" Q is the X coordinate of each point on the outer periphery of the seal impression (3), y (xn), y (xQ) is the X coordinate corresponding to X n, X g on the outer periphery of the seal impression (3), Y ” (
xn+m) I y” (xn+ /) is an impression (3)
The rising edge corresponding to Xn+□, n+1 at the outer circumferential position of
z (x n + t) is the seal impression (“n” at the outer circumferential position of 31
+m l ” is the falling edge corresponding to n+1, that is, the X coordinate of the point where the seal imprint area ends.

Then, the shape measuring device (8) further obtains the width of the seal from X g - X n of the detected surrounding position values,
X0=(xQ+xn)/2 and Yo=1/2 (Y
1 (xn+7)+y2(xn+, Calculate the center position of the seal imprint from the moon) In Figure 9J7, the shape signal generator aυ generates a desired, e.g., square seal imprint with the center position (Xo, Ya) as the center. The seal imprint determination device [1+91 is the detected surrounding position y1("n+/) I with the X axis as a reference".
γ! The difference between (I n + 1) and the desired peripheral position of the seal impression Y"("H+ / ) + Y"("n+j), ΔYn+l, that is, ΔYn+! =(Yl("n-+-j)-γ'BXn+,
)) + (yBX ) Y'("n+1>)n+1 is obtained. Similarly, the difference △y from xn to IQ is obtained.
Calculate Q~△YQ (for similar xn2 and XQ, yl(xn
)=y2(xl,)=y(xn),γI(xQ)di2
(X Q )=y(xQ))L, ΣY=△γ. Submit 10...+△YQ, smooth it and compare it with the determined tolerance value d,
If ΣY\d, it is determined that it is a desired seal impression, and the data within the external shape of the seal impression is stored in the first slave memory section (5) in the next seven frames.

In addition, in the above embodiment, a shape measuring device and a seal imprint judgment device for detecting and comparing the rising and falling positions may be provided.Also, in the above embodiment, the case of detecting a seal imprint was explained, but if the mark It may be a league label detection device or other reading target object detection device, and the same effect as the above embodiment can be achieved.

As described above, according to the present invention, a shape measuring device that measures the shape of a seal impression, a shape signal generating device that generates a seal impression signal of a desired shape, and a comparison judgment between the measured shape and the desired shape, Since only the data of the seal impression determined to have the desired shape is stored in the image memory section, noise and other marks are not read erroneously, and only the target seal impression can be read.

[Brief explanation of the drawing]

%1 is a block diagram showing a conventional seal imprint reading device, FIG. 2 is a diagram showing a conventional reading range, FIG. 3 is a block diagram showing a seal imprint reading device according to an embodiment of the present invention, and FIG. Diagram showing the reading range of each frame, Section 5 (1)...Securities, (2)...
...Color television camera 1.3)...Seal imprint, +41...Al1) conversion unit, (8)...Shape meter side bag -1Uυ...Shape signal generator, (9)... ... Seal impression determination device, +51... Image memory unit. In the two figures, the same reference numerals indicate the same or corresponding parts. Agent Nobu S No - Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] +1) A transport mechanism that transports the object to be read, a light receiving section that converts the intensity of reflected light from the object being transported into an electrical signal, and an A/D that converts the electrical signal from the light receiving section into digital information. A stamp aJIX device is equipped with a converter and an image memory section for storing digital information from the A/D converter, and reads a friend's seal imprinted on an object to be read.
a shape measuring device that measures the shape of a seal impression from the output of the D converter; a shape signal generating device that generates a shape signal of a desired seal impression stored in advance; and a shape measured by the shape measuring device and the shape signal generating device. and a seal imprint determination device that compares and determines the shape generated by the
A seal imprint poetry device characterized in that only data of a fixed seal impression is stored in the image memory section.