JPS58161082A - Collating system of seal impression - Google Patents

Abstract

PURPOSE:To shorten the collation time, by approximating the collation at a rough rotation angle and obtaining next a rotation angle precisely in a seal impression collating device. CONSTITUTION:Registered picture data (b) is inputted to an image buffer 10, and picture data (a) to be collated is inputted to an image buffer 13, and picture data (a) is converted to low-resolution picture data (c) in a data converting part 17 and is stored in an image buffer 14. Data of the image buffer 14 is rotated at a rough rotation angle by a rotation controlling part 12 and is sent to an image buffer 15. Meanwhile, registered picture data (b) is converted to low- resolution registered picture data (d) by a data converting part 16, and the rough rotation angle is found in a coincidence detecting part 11. Thereafter, low-resolution data are switched to high-resolution data by selectors 19 and 20 to collate them with each other, thereby accelerating the convergence of trial and error.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a collation device that collates a stamp with a registered seal, and particularly relates to an improvement of a rotational collation method that can speed up the collation time.

(6) Technology Background Recently, financial institutions, etc. have been experimenting with a method of using a seal verification device to check customer stamps such as bills and checks, and registered seals.The zero verification device irradiates one line of light onto the stamps to be verified. Image data corresponding to the seal is obtained by projecting it onto an image sensor through an optical lens, and is compared with the image data of the registered seal.Usually, however, the image is displayed on a #i cathode edge tube and visually compared.However, recently. Now, the development and practical application of a query device that automatically performs the verification without using the verification tube ii* is progressing.
Prior art and problems The conventional method will be explained as an example in Figures 1 to 3 below.
811#i is a perspective view showing the head of the verification device to which the present invention is applied, 21i1 is a schematic configuration diagram of the verification device of FIG.
Showing block a y/II 〇-medium, l is document, 2 is letter, 3 is light source lamp, 4 is lens system, 5 is image sensor, 6 is collation unit, 7 is registered file, 8-10 company image Buffer, 11#i match detection unit, 12Fi control unit, a indicates image data, and b indicates registered image data.

As shown in FIGS. 1 and 2, light from a one-light source lamp 3 radiates onto a document l on which a seal 2 is written.

The irradiated light does not reflect on the vermilion stamp 20 part, and the stamp 2
The light is reflected from other white parts, and the reflected light is focused on the image sensor 5 by the lens thread 4.

The stamp II of the stamp 2 stamped on the paperback document 1 is projected onto the light-receiving surface of the image sensor 5, and converted into image data a by the light disaster image sensor 5. This image data aFi collation unit 6
It is true that the registered seal is entered in 1 and the registered seal is marked with 7 rings as image data.If the answer is NO, it means that it is different from the registered seal.

Next, we will explain the matching method. In Figure 3,
The image buffer γ8 stores the high-resolution (for example, 20 lines/l If) Ikl* data a input from the image sensor 5, reads out the held data according to the address given by the control unit 12, and transfers the data to the image buffer. 9
The image buffer 9 has the function of storing the transfer data from the image buffer 7 according to the address seen by the control @ 12, and the function of transferring the held data to the match detection unit 11. The 0 image buffer 10 is transferred from the external registration file 7 and has the function of storing high-resolution registered data bYt and transferring it to the coincidence detection unit 11 as necessary. In order to rotate the data in image buffer 8 and transfer it to image buffer 9,
It has a function of calculating the rotated address of each pixel in , and a function of supplying the calculated address to the image buffer 9.

Coincidence detection unit 11 between image data Ia and registered image data b
The rotation angle t is set according to the feedback data from 0 to 0. 〇-period detection 1sII counts and outputs the image buffers 9 and 10 at each prime number tube. Since the control unit 12 has such a configuration and function, when performing seal verification, the registered image data b that has been registered in advance is transferred from the registration file 7 to the image puffer 10. Input the image data a of the seal to be compared into the image buffer 8.
It is assumed that data 110 is transferred to the center of the buffer.

The contents of image buffer 8 are transferred to image back 7 as is.
0 sent to 9 and image buffer 9°101-j
The data is transferred to the coincidence detection section 11 in synchronization. The match detection unit 11 counts the number of matching pixels and controls the match & control unit 1.
2. Feed back. The control unit 12 gives addresses to the image buffers 8 and 9, respectively, and
The contents of the file are rotated and transferred to the image buffer 9. Feedback data from the coincidence detection section 11 is used to determine this rotation angle. That is, inversion, rotation, and transfer are repeated in trial and trial 1 until a rotation angle that maximizes the degree of matching is found. In this way, if the maximum value of the degree of matching does not reach the preset judgment value, the judgment is NO and the seal is registered and is considered to be different from the 9-seal stamp, and if the value is greater than the judgment value, it is OK and it matches the registered seal. This will happen. In this way, stamps can be verified. However, this method requires a large amount of high-resolution data for highly accurate verification, and furthermore, that large amount of data must be transferred many times for rotation and verification. need, for example im
If it takes about 0.3 seconds to control the rotation of l, it takes twice as much time as the number of repetitions of rotation, so there is a drawback that the time between collation and judgment K11 is longer.

(Purpose of the Invention The purpose of the invention is to solve the above-mentioned drawbacks, and to provide a rotary stamp matching method that speeds up the matching time. (・) Structure of the Inventive Form Irradiate the stamp written above with light, irradiate the wrinkles, and make a nine-light O reflected light] The obtained image data of the stamp and the pre-stored nine-item image data are aligned in a collation s, and one row is performed. In the seal verification device for verification, a conversion means for converting the image data of the stamp and the registered image data into low-resolution data is provided in the inquiry 111, and the image data converted by the conversion means and the registered image data are This is a seal verification method in which after the position alignment is performed, one line of pre-r position alignment is performed using the above-mentioned drawing data and the above-mentioned registration/painting data to perform a comparison.

In this way, you can achieve your purpose.

(f) Embodiment of the Invention An embodiment of the invention will now be described with reference to FIGS. 4 and 5. FIG. 4 is a block diagram showing an embodiment according to the present invention 14, and FIG. 5 is an explanatory diagram of data conversion in FIG.
4a u memory range, 13b, 14bBh+votes, 16
．． 17 is a data conversion unit, and 18 and 19 are tj selectors. In FIG. 4, the same parts are indicated by the same symbols as in FIG. 3. In FIG. It is a memory that stores information. The data converter 16.17 converts the high-resolution data from the image buffer 10.13 into low-resolution small amount data, so as shown in FIG. In the image buffer 14, the 0 selectors 18 and 19, which are averaging circuits that make one pixel 14m, switch the inputs of 211 using control signals and output them. Switch and output low resolution data. Image buffer 14#i Has the function of storing high seismic resolution data or low resolution data transferred from the image buffer 13 and transferring rotational data to the image buffer 15 according to the control signal of the control 1B12.Low resolution mode 1lFi , Only the area indicated by a dotted chain - in the figure is subject to rotation. ◎The image buffer 15 has the function of storing the data sent from the image buffer 14 and transferring the data to the coincidence detection 15II in synchronization with the image puffer 1G. There is.

Since it has such a structure and function, it is not necessary to perform seal verification by inputting the registered image data bt image buffer IOK and inputting the image data to be verified into the image buffer 8.

Next, the image data a of the image buffer 13 is converted into low-resolution image data @ by the data converter 17, and the selector 2
0t - is stored in the image buffer 14. Since the amount of this low-resolution image data aFi data is small, the rotation control [512 rotates the data in image buffer 14 at a rough rotation angle and sends it to image buffer 15; on the other hand, image buffer 1
The registered image data b of 0 is converted into low-resolution registered image data d by the data converter 16, and the image data 15
Synchronizing with the data of , the registered mig# data a and the image data b are compared at a precise rotation angle using a method similar to the conventional method. In this way, try f1a
O(g), which can speed up the convergence of 艷 and quickly perform seal verification.As explained in detail of the invention, according to Honji Wi4, it is possible to collate it with the Itsusu Gaso data of registered Maru-in overseas. The image data of the seal is converted into TGK resolution data and approached at a coarse rotation angle, and then the seal is compared by precisely determining the rotation angle 1 using the high resolution data, which has the effect of significantly shortening the comparison time. 0

[Brief explanation of the drawing]

11I1 Figure 2 is a perspective view showing the head portion of the verification device to which the present invention is applied, and Figure 2 is a schematic configuration diagram of the verification device in Figure 1.
P/@ showing the control circuit of the collation unit in Figure 2 of SS Koro
41a: A block diagram showing an embodiment according to the present invention; FIG. 5 is a diagram illustrating the data conversion of FIG. 4; Registration file, B ~
10. 18 to 15 are image bar ff77.11 is a match detection unit, 1 is a control unit, 1 is image data, b is a registration ib
*This is data.

Claims (1)

[Claims] A seal stamp that irradiates a stamp written on a form with light, and aligns and collates the image data of the stamp obtained from the reflected light of the irradiated light and registered image data stored in advance in a collation unit. In the collation device, the collation section is provided with a conversion means for converting the image data of the stamp and the registered image data into low-resolution data, and the position of the image data converted by the scissors conversion means and the climbing picture data is After completing the alignment, perform the entire alignment process using the image data and the registered data to compare the image data.
Seal verification method with t% mold.