JPS60101679A - Seal imression collating device - Google Patents

Abstract

PURPOSE:To enable to output a highly accurate resemblance calculation output even for a seal impression printed with largely different densities from registered seal impression by providing an ID information area and plural impression registration areas and making collation and comparison. CONSTITUTION:When collating a seal impression, an ID information area 51 and plural seal impression registration area 52 are provided on a registration orignal, and impression is made in the area 52 to obtain seal impressions of three different densities, thick state, thin state and intermediate state. In collating a seal impression when an original to be collated is inputted to a seal impression registration collating device, it is inputted to a seal impression cutting out circuit 38 through each circuit. The original to be collated is displayed on a display unit 42 and confirmed, and the confirmed seal impression information is inputted to a seal impression comparing circuit 41. Three kinds of seal impression information stored in a seal impression storing area 40 ar inputted from the area 51 to the circuit 41, and compared with seal impression information from the original to be collated successively. Consequently, highly accurate resemblance calculation output can be outputted for a seal impression which is largely different in density from registered seal impression.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a seal imprint collation device, and more particularly to a seal imprint collation device that enables highly accurate verification of seal imprints with different densities.

[Background of the invention]

The configuration of a conventional seal imprint verification device will be explained based on the block diagram shown in FIG. In the figure, 1 is an input paper, 2 is a scanner, 3 is a quantization circuit, 4 is a memory buffer, 5 is a preprocessing circuit, and 6 is a pattern matching section.
7 is a keyboard, 8 is a control unit, and 9 is a file.

A region including a stamp pattern stamped on input paper 1 is scanned by scanner 2, and the output of the photoelectric conversion signal IO is digitized by quantization circuit 3. The digitized quantized signal 11 is sequentially transferred to a memory buffer 4.
is stored in

Details of the input paper 1 are shown in FIG. 2. On the input paper 1, there is a seal imprint area 21 and identification information (1:1) corresponding thereto.
ID (eg, bank account number, etc.) area 22 is included.

The above ID is normally input from the keyboard 7 to the control unit 8 as a pattern IDl6, and the control unit 8 reads it out to the file 9 based on directory information (not shown) through the same process as that performed during a general file search. A control signal 18 is given to cause the pattern matching unit 6 to send out the registered pattern 17 corresponding to the TD.

On the other hand, the preprocessing circuit 5 receives the original pattern 12 to be matched from the memory buffer 4, and based on the normalization control signal 15 from the pattern matching section 6, the erect matching pattern is subjected to normalization processing for one rotation of the position. 13 to pattern matching section 6
Send to. The pattern matching section 6 calculates the degree of similarity between the matching pattern 13 and the registered pattern 17, and outputs the result as a matching result 14.

A problem with a seal matching device such as "Double Stamp" is that if the density of the seal impression changes significantly depending on the degree of ink padding, etc., the degree of similarity that should be obtained is not output.

Note that in normal seal imprint verification, the registration of a seal imprint is the first procedure and is done only once, so if the seal is not stamped with an appropriate density, it is possible to reseal it.

However, for verification seal impressions, even if the stamp is defective,
Since resealing is generally not possible, in the verification process,
There is also a need to correct the shading of the seal imprint pattern.

[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 imprint collation devices, and to correct imprints stamped with density significantly different from registered seal imprints. Another object of the present invention is to provide a seal imprint matching device capable of outputting a highly accurate similarity calculation output.

[Summary of the invention]

The above-mentioned object of the present invention is to provide a seal imprint matching device that compares a matching pattern obtained by photoelectrically converting a seal imprint stamped on paper with a registered pattern registered in advance, in which the registered pattern is converted into a plurality of seal impressions of different shading. This is achieved by a seal imprint matching device comprising a plurality of corresponding patterns, and further comprising means for comparing the matching pattern with the plurality of registered patterns and means for outputting the comparison result by the comparing means.

[Embodiments of the invention]

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

FIG. 3 is a block diagram of a seal imprint registration and verification apparatus according to an embodiment of the present invention. In the figure, 31 is a light source that illuminates a seal imprint registration manuscript (hereinafter simply referred to as "registration manuscript") 34;
2 is a lens, 33 is an image sensor, 35 is an amplifier, 3
6 is an AD conversion circuit, 37 is an illuminance correction circuit, and 38 is a seal imprint cutting circuit. In addition, 39 is a display memory, 4
0 is a seal imprint storage area, 41 is a seal imprint information comparison circuit, 42 is a display section, 43 is a keyboard, and 44 is a printer.

First, registration of a seal impression will be explained. Reflected light from the registered original 34 illuminated by the light source 31 is focused onto the image sensor 33 by the lens 32 . The output of the image sensor 33 is amplified by an amplifier 35, and the amplified seal imprint information is sent to an AD.
The conversion circuit 36 digitizes the data.

Next, the digital information corrected by the illuminance correction circuit 37 is input to the seal impression cutting circuit 38.

FIG. 4 shows an example of a registered document that is handled by the seal imprint registration and verification apparatus of this embodiment. An ID information area 51 and a plurality of seal imprint registration areas (three in this embodiment) 52 are provided on the registered document.

The stamp impression registration area 52 is in a state where sufficient stamp pad is applied.

Stamping is performed so as to obtain impressions of three different densities: a thinned state and an intermediate state.

The above registration document is set in the seal imprint registration verification device of this embodiment, and the ID information and seal imprint information are taken in through each of the circuits.
The information is input to the display memory 39. The captured seal imprint information can be configured to be displayed on the display section 42 for confirmation through key operations on the keyboard 43. The stamp information that has been confirmed is assigned the corresponding ID5 as shown in Figure 5.
3 is stored in the seal imprint storage area 40.

Next, verification of seal impressions will be explained. FIG. 6 shows a document (verification document) 54 having a stamp (one) 55 and an ID 56 to be verified. When the verification document 54 is input to the seal imprint registration and verification apparatus of this embodiment, it is input to the imprint cutting circuit 38 via each circuit, as in the case of registration. The seal imprint information is captured at a preset capture level and stored in the display memory 39.

This seal imprint information can be configured to be displayed on the display section 42 and checked by key operations on the keyboard 43.

The stamp information that has been checked is input to the stamp information comparison circuit 41 for verification by key operation on the keyboard 43! Further, three pieces of seal imprint information previously stored in the seal imprint storage area 40 are retrieved using the ID 56, and similarly input to the seal imprint information comparison circuit 41. The seal imprint information comparison circuit 41 compares the imprint information from the verification document (hereinafter referred to as "verified seal imprint information") with one of the seal imprint information read from the seal imprint storage area 40 (hereinafter referred to as "registered seal imprint information"). to calculate the similarity. At this time, one of them is fixed, the other is rotated, and the value with the maximum similarity is stored.

When the comparison with one piece of registered seal imprint information is completed, the process moves on to the comparison with the next registered seal imprint information, and the comparison with all three pieces of registered seal imprint information is sequentially performed.

When the comparison of each registered seal imprint information is completed, compare the maximum similarity of the collated seal imprint information with each registered seal imprint information, and use the maximum similarity to This is the result of checking the seal imprint. This matching result is
For example, it is displayed on the display section 42 in the form shown in FIG. 7, and waits for the operator's decision. Of course, it goes without saying that the device may make the determination by a method such as comparing with a predetermined threshold value.

In the above embodiment, an example was shown in which a stamp is stamped on a registered document so as to obtain stamp impressions with three different densities: a state with sufficient ink pad, a state with *<, and a state in between. Omitting the intermediate state and reducing the number of seal impressions to two,
It goes without saying that the number of intermediate states may be increased to make the number of seal impressions four or more.

In addition, as described above, instead of stamping in different states with different degrees of ink pad A, the impression information corresponding to a plurality of stamping states is captured from the impression of one state by changing the capture level. Also good. In this case, the capture level can be set while referring to the display on the display unit 42.

〔Effect of the invention〕

As described above, according to the present invention, in a seal imprint matching device that compares a matching pattern obtained by photoelectrically converting a stamp imprinted on paper with a registered pattern registered in advance, the registered pattern is It is composed of a plurality of patterns corresponding to a plurality of seal impressions, and also includes a means for comparing the matching pattern with the plurality of registered patterns and a means for outputting the comparison result by the comparison means, so that the density is significantly different from that of the registered seal impression. Even for different seal impressions,
This has the remarkable effect of realizing a seal imprint matching device that can output highly accurate similarity calculation output.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional seal imprint verification device.
Fig. 2 is a diagram showing an example of an input form, Fig. 3 is a block diagram of a seal imprint registration and verification device which is an embodiment of the present invention, Fig. 4 is a diagram showing an example of a registered manuscript, and Fig. 5 is a diagram showing an example of a registered document. FIG. 6 is a diagram showing an example of the verified R draft, and FIG. 7 is a diagram showing an example of the verification results. 33: Image sensor, 34: Registered original, 37: Illuminance correction circuit, 38; Seal imprint cutting circuit, 39; Display memory,
40: Seal imprint storage area, 41: Seal imprint information comparison circuit, 42;
Display section, 43: Keyboard, 44: Printer, 51: I
D information area, 52: Seal imprint information area. Figure 1 Figure 3 Figure 4 Figure 1 O;: bz 52

Claims (1)

[Claims] (1) In a seal imprint matching device that compares a matching pattern obtained by photoelectrically converting a seal imprint stamped on paper with a registered pattern registered in advance, the registered pattern is divided into multiple What is claimed is: 1. A seal imprint matching device comprising a pattern, and further comprising means for comparing said matching pattern with said plurality of registered patterns and means for outputting a comparison result by said comparing means.