JPS60205679A - Display method of seal verification device - 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] [Field of Application of the Invention] The present invention relates to a display method of a seal verification device, and in particular, a method for visually determining a seal impression registered in advance (registered seal impression) and a seal impression to be verified (verification seal impression). The present invention relates to a display method of a seal stamp collation device suitable for various cases.

[Background of the invention]

In conventional visual seal verification devices, registered seal impressions and verification seal impressions are displayed enlarged at a constant magnification. For this reason, there is a problem in that small seal impressions are displayed small and large seal impressions are displayed large, giving a sense of strangeness to the visual appraiser. Further, depending on the device, there is a problem in that a small seal imprint is not enlarged to a sufficient size, and the device does not fully function as a seal verification device.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to solve the above-mentioned problems in conventional seal verification devices, to avoid giving a sense of strangeness to a visual appraiser, and to sufficiently detect small seal impressions. It is an object of the present invention to provide a display method for a seal stamp matching device that can be enlarged and displayed to make visual verification more reliable in seal stamp matching.

[Summary of the invention]

The main point of the present invention is to make the size of the display in the seal verification device variable according to the taste of the visual appraiser, and to display the image at a constant size regardless of the size of the seal impression, thereby making the appraiser feel uncomfortable. The reason lies in the fact that the .

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing a seal verification device which is an embodiment of the present invention. In the figure, 10 is a sheet of paper on which a verification seal is affixed, 11 is a reading section composed of photoelectric conversion means, 12 is an internal storage section, 13 is an external storage section, 14 is a display section, 15 is an input keyboard, Reference numeral 16 indicates a control unit that controls each of the above-mentioned means.

In order to more accurately check the seal by visual inspection, the enlarged seal impression can be viewed as Il! Needless to say, it is good to be aware of this. In a seal verification device that assumes visual confirmation, it is important to read the seal imprint with a reading unit that has a resolution higher than that of the human eye and display it at an appropriate magnification.

First, by inputting instructions from the keyboard 15, the reading section 1
1 reads the verification seal imprint on the paper sheet lO. The read verification seal imprint pattern is stored in the internal storage section 12 provided within the control section 16 via the control section 16 .

Further, registered seal imprint patterns registered in advance in the external storage section 13 are read into the internal storage section 12 and stored in accordance with input from the keyboard 15.

The comparison seal imprint pattern and the registered seal imprint pattern stored in the internal storage section 12 are subjected to a comparison process by the control section 16, and are displayed on the display section 14 individually or simultaneously in their actual size or enlarged.

FIG. 2 shows the flow of processing for verification and enlargement display, from when the verification seal imprint and the registered seal imprint are subjected to verification processing and are enlarged and displayed. In the figure, reference numeral 20 indicates a storage area within the internal storage section 12, and the verification seal imprint pattern 21 input from the reading section 11 is stored in the storage area 20. Further, 22 indicates another storage area within the internal storage section 12, and the registered seal imprint pattern 23 input from the external storage section 13 is stored in this storage area 22.

Reference numeral 24 denotes a verification circuit comprised of a microprocessor. The verification circuit 24 normalizes the verification seal imprint pattern 21 and the registered seal imprint pattern 23, and determines their respective center positions and horizontal and vertical projection lengths. Further, the number of intersections between lines drawn radially from each center position at a unit angle θ and the seal impression is taken into a histogram (density sum processing), and the degree of similarity with the histogram of the verification seal impression pattern is calculated.

Since the angle OIl that takes the largest value of the similarity is the difference in rotation angle between the verification seal imprint pattern and the registered seal imprint pattern, either the verification seal imprint pattern or the registered seal imprint pattern is set at the angle θ. and align the rotational positions of both seal impressions. Next, both seal impressions whose rotational positions match are cut in half at a specified angle, and stored in the storage area 25 in the internal storage section 12 as a seal impression pattern 26 after verification processing.

The seal imprint pattern 26 after the above-mentioned verification process is enlarged in the area 28 in the internal storage section 12 by an enlargement circuit 27 (to be described later) at an enlargement rate based on the projection length determined by the normalization process.
is stored as an enlarged seal impression pattern 29. This enlarged seal imprint pattern 29 is displayed on the display section 1 via a display circuit 30.
Display example 32 is displayed on the CRT 31 of No. 4.

FIG. 3 is a diagram for explaining an enlargement processing method by the enlargement circuit 27, and FIG. 4 is a diagram showing an example of the configuration of the enlargement circuit 27. The enlarging process will be described below with reference to FIGS. 3 and 4.

First, with reference to FIG. 3, an example will be described in which a grid pattern (hereinafter referred to as "original pattern") 34 of an original image is enlarged four times.

Now, the origin of the coordinates of the original pattern 34 is A. O, and each lattice point is A (X=1, 2..., II i Y =
1, 2,...Y...+n). In the enlarged pattern 35 that has been enlarged four times, the grid point A10 of the coordinates of the original pattern 34 is
jAol are shifted to the quadruple magnification position A(o, AlO2, as indicated by arrows 36, 37, respectively).

Also, origin A. . and the locus @x, located between the four times enlarged positions of each grid point AM', and Y8, (i=o, 1.-
..., n-1, j=1, 2.3) is determined by the configuration information of lly''110'' of the grid point AXY of the original pattern and the mask that corresponds to this, which will be described later. Coordinates x1, + y+, (i=o,
1. ...=, n-1, j=1.2.3), II
l #+ , It Q 11 is determined and filled.

For example, in a mask 38 (see FIG. 5) in which two diagonal bits are II I II and the remaining two bits are 11011, the position In
The += point is shifted to the corresponding enlarged coordinate as 'l'.

The above operation will be explained below using the circuit configuration shown in FIG.

Now, the stamp pattern data, which is a two-dimensional digital image in the form of a rectangular grid, is serially input for one scan and latched by the latch circuit 43. In parallel, the same scan data is sent to the scan buffer (A) 40, and the next scan data is sent to the scan buffer (B) 41, respectively.
Store. Next, the selector 42 selects new scan data different from the data stored in the latch circuit 43 and stores it in the latch circuit 51.

On the other hand, the enlargement ratio latch circuit (PX) 45 in the X direction and the Y
The directional magnification latch circuit (PY) 4B latches a predetermined magnification according to the size of the stamp pattern.

Once the magnification rate is determined, the coordinates of the point between the origin A00 and each grid point AXY shown in FIG.
J can be determined. This coordinate position has periodicity corresponding to each magnification in the =X and Y directions, so one period of the coordinate value group that has periodicity in both directions is shifted in the Registers 46 and 49 (X
CNT, YCNT).

Using the magnification factor and the coordinate values for one cycle, the X-direction interpolation circuit 47 and the Y-direction interpolation circuit 50 can calculate all coordinates that may exist between the grid points of the original pattern based on the magnification factor. .

The black and white determination circuit 44 selects previous scan data, new scan data, coordinate values that may exist between grid points of the original pattern,
Based on the mask pattern, the bits '''l II, LL Q 17 for each enlarged lattice are determined and output in serial.

When the black and white determination for one scan is completed, the next scan data is input to the latch circuit N43, and at the same time, the scan buffer (A) 40. (B) 41, different data is selected from the selector 42 and stored in the latch circuit 51, and the same black/white determination is repeated anew. In this way, the original image of the seal impression is converted into an enlarged image.

According to the above embodiment, on the display of the seal verification device, it is possible to enlarge and display the verified seal imprint to a certain size, regardless of the size of the seal, so that the appraiser does not have to change his/her viewpoint. This method has the effect of making stable visual seal verification possible because the verification can be performed in a timely manner.

In the above embodiment, the registered seal impression is read from an external storage device, but the registered seal impression can be input from the sheet reading section or from outside the apparatus using a communication line etc. etc., and the present invention does not exclude such embodiments.

It goes without saying that circuits other than those shown in the above embodiments may also be used for the collation processing circuit and the enlargement circuit.

〔Effect of the invention〕

As described above, according to the present invention, the size of the display in the seal verification device can be made variable according to the preference of the visual appraiser, and the size of the display can be made constant regardless of the size of the seal impression. Therefore, it does not give a sense of strangeness to the visual appraiser,
This has the remarkable effect of realizing a display system for a seal stamp matching device that can sufficiently enlarge and display even a small seal imprint, thereby making it possible to more reliably perform visual appraisal in seal stamp matching.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a seal verification device which is an embodiment of the present invention, Fig. 2 is a diagram showing the flow of processing for verification enlargement display, and Fig. 3 is a diagram for explaining enlargement processing by an enlargement circuit. , FIG. 4 is a diagram showing an example of the configuration of an enlargement circuit, and FIG. 5 is a diagram for explaining a method for determining black and white in enlargement processing. 10: paper sheet, 11: reading section, 12: internal storage section, 13:
External storage section, 14: Display section, 15 = Keyboard, 16 Two control section, 24: Verification circuit, 27: Enlargement circuit. Figure 1 1116 U Figure 5 S9 Figure 2

Claims (1)

[Claims] (1) In a seal verification device having means for reading a seal imprint affixed on a paper sheet, etc., means for storing a seal imprint pattern read by the reading means, and means for displaying the seal imprint pattern, the memory is stored in the storage means. A display method for a seal stamp matching device, characterized in that a registered seal imprint pattern or a stamp pattern to be checked is enlarged to a predetermined size and displayed.