WO2015172466A1

WO2015172466A1 - Marketable security authenticity testing method and related device

Info

Publication number: WO2015172466A1
Application number: PCT/CN2014/085913
Authority: WO
Inventors: 俞路
Original assignee: 苏州保瑟佳货币检测科技有限公司
Priority date: 2014-05-13
Filing date: 2014-09-04
Publication date: 2015-11-19
Also published as: CN104008597A

Abstract

Disclosed are a marketable security authenticity testing method and related device, the method comprising: scanning the magnetism distribution of a tested marketable security to obtain the magnetism distribution image of the marketable security, and conducting optical scanning on the tested marketable security to obtain the optical image of the marketable security; overlapping the magnetism distribution image and the optical image to obtain the composite image of the marketable security; comparing the composite image of the tested marketable security with a pre-stored composite image of an authentic marketable security to determine whether image features match; if yes, then determining that the tested marketable security is an authentic marketable security; if not, then determining that the tested marketable security is a fake marketable security.

Description

Method for authenticity verification of valuable securities and related device

Technical field

The invention belongs to the technical field of authenticity inspection, and in particular relates to a method for authenticity verification of valuable securities and related devices.

Background technique

At present, the authenticity test for valuable securities such as banknotes is mainly divided into two types: image detection and magnetic detection. Among them, the magnetic detection mainly detects whether a certain area or some areas of the securities have magnetic properties and magnetic strength. In fact, only the magnetic properties of the securities of the securities are characteristically detected, and the counterfeiters can easily smear the magnetic powder materials on the magnetic regions of the securities to falsify the securities.

Therefore, the authenticity verification method of the securities in the prior art can be easily overcome by the counterfeiter, and the accuracy of the inspection needs to be improved.

Summary of the invention

In view of the above, an object of the present invention is to provide a method for authenticating and verifying securities and related devices, which can improve the accuracy of the test results.

To achieve the above object, the present invention provides a method for authenticity verification of a valued security, comprising:

Scanning the magnetic distribution of the detected securities to obtain a magnetic distribution image of the securities and optically scanning the detected securities to obtain a light image of the securities;

Performing a crossover process on the magnetic distribution image and the light image to obtain a composite image of the securities;

Comparing the composite image of the detected securities with the pre-stored composite image of the real securities, determining whether the image features of the two match, and if so, determining that the detected securities are genuinely valuable Securities; otherwise, it is determined that the tested securities are false securities.

Preferably, scanning the magnetic distribution of the detected securities to obtain a magnetic distribution image of the securities comprises: scanning a magnetic distribution of the magnetic regions of the detected securities to obtain a magnetic distribution of the magnetic regions of the securities Image; optically scanning the detected value document to obtain a light image of the value document includes optically scanning the magnetic region of the detected value document to obtain a light image of the magnetic region of the value document.

Preferably, the above verification method may further comprise: determining a location of a magnetic region of the value document.

Preferably, comparing the composite image of the detected securities with the pre-stored composite image of the real securities includes:

The composite image of the detected securities is compared with the previously stored composite image of the corresponding type of real securities according to the type of the securities to be detected.

Preferably, the composite image of the detected securities is compared with the composite image of the pre-stored real securities, and determining whether the image features of the two match includes:

The texture features of the composite image of the detected securities are compared with the texture features of the composite image of the pre-stored real securities, and whether the texture features of the two match are determined.

Another aspect of the present invention also provides an authenticity verification device for a securities, the device comprising:

a magnetic distribution image scanning unit for scanning a magnetic distribution of the detected securities to obtain a magnetic distribution image of the securities;

An optical scanning unit for optically scanning the detected securities to obtain a light image of the securities;

An image synthesizing unit configured to cross-overlap the magnetic distribution image and the optical image to obtain a composite image of the detected securities;

And an image comparison unit configured to compare the composite image of the detected securities with the pre-stored composite image of the real securities, determine whether the image features match, and if so, determine that the detected securities are Really valuable securities; otherwise, it is determined that the tested securities are fake securities.

Preferably, the optical scanning unit comprises:

a visible light emitter for emitting visible light to the detected security;

The light receiver is configured to receive the reflected light reflected back from the detected value document to obtain a visible light image signal of the detected value document.

Preferably, the device further includes a first amplifier and a first analog to digital converter connected in sequence;

a first amplifier for amplifying a signal of the optical image output by the optical scanning unit;

The first analog-to-digital converter is configured to perform analog-to-digital conversion on the signal of the amplified optical image output by the first amplifier, and output the signal to the image synthesizing unit.

Preferably, the device further includes a second amplifier and a second analog to digital converter connected in sequence;

a second amplifier for amplifying a signal of the magnetic distribution image output by the magnetic distribution image scanning unit;

The second digital-to-analog converter is configured to perform analog-to-digital conversion on the signal of the amplified magnetic distribution image output by the second amplifier, and output the signal to the image synthesizing unit.

Preferably, the image comparison unit is configured to compare the texture features of the composite image of the detected securities with the texture features of the composite image of the pre-stored real securities, and determine whether the texture features of the two match.

According to an embodiment of the present invention, a magnetic distribution image and a light image of the detected securities are acquired, and the two images are subjected to cross-overlap processing to obtain a composite image, and an image of the contract image of the composite image and the real securities is obtained. Whether the feature matches and judges the authenticity of the securities, the detection result is more accurate than the magnetic detection method in the prior art.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are Some embodiments of the present invention may also be used to obtain other drawings based on these drawings without departing from the art.

1 is a schematic flow chart of an embodiment of an authenticity verification method for a securities provided by the present invention;

2 is a schematic diagram of an embodiment of an authenticity verification apparatus for a securities provided by the present invention;

FIG. 3 is a schematic diagram of a specific implementation of the authenticity verification apparatus for the securities in the embodiment of FIG.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic flow chart of an embodiment of an authenticity verification method for a securities provided by the present invention. In the embodiments of the present invention, the securities include, but are not limited to, banknotes, vouchers, and the like. As shown in Figure 1, the method is as follows:

Step S101: Scanning the magnetic distribution of the detected securities to obtain a magnetic distribution image of the securities.

The inventor found through verification that the magnetic area on the securities is actually a magnetic image, such as a pattern in a house, where the window frame portion of the window is magnetic, and the glass is non-magnetic, the beam is Magnetic, the tile is not magnetic. The magnetic detection in the prior art only detects the presence or absence of magnetic properties in the region, and in the embodiment of the invention, the magnetic distribution of the securities is scanned to obtain a magnetic distribution image.

In practice, a full-scale magnetic distribution scan can be performed on the detected securities to obtain a full-scale magnetic distribution image. However, in practice, the valuable securities are often only a part of the area. In order to save the workload of magnetic distribution scanning, consideration may be considered. Only the magnetic distribution of the magnetic region of the detected securities is scanned to obtain a magnetic distribution image of the magnetic region of the securities.

In practice, there is a problem of localization of a magnetic region when scanning the magnetic distribution of the magnetic region of the value document. For this purpose, the method may further comprise the step of determining the position of the magnetic region of the value document, the problem being solved at least Two schemes, one scheme is: directly searching for the position of the magnetic region corresponding to the current type of securities according to the information of the magnetic region positions of the various securities obtained, for example, the magnetic region position of the 5-yuan denomination banknote And the magnetic region position of the 10-yuan denomination banknote is known in advance, so that when a 5-yuan denomination banknote is actually scanned for magnetic distribution, the position of the magnetic region of the banknote can be quickly known; another solution is to determine while scanning. The method of scanning the valuable securities progressively, defining the boundary where the magnetic distribution is scanned as the boundary of the magnetic region, thereby obtaining the information of the magnetic region, and the boundary of the magnetic distribution may be the smallest rectangle capable of enclosing the magnetic distribution. The area can also be defined as the area between the first occurrence of magnetic lines and the last occurrence of magnetic lines.

Step S102: Optically scanning the detected securities to obtain a light image of the securities.

The optical scanning here can be done by using visible light or by using invisible light (such as infrared light, ultraviolet light, etc.). A specific implementation manner is: performing optical scanning of visible light on the detected securities to obtain a visible light image of the detected securities.

If the full-scale magnetic distribution image is scanned for the detected valuable securities in step S101 to obtain a full-width magnetic distribution image, then in step S102, the detected valuable securities are also subjected to full-width optical scanning to obtain a full-width optical image. If the magnetic distribution of the magnetic region of the detected securities is scanned in step S101, the magnetic region of the detected securities is also optically scanned in step S102 to obtain the light of the magnetic region of the securities. image.

It should be noted that it is not necessary to generate a real image in steps S101 and S102, and it is possible to scan an image signal, such as a signal of a light image or a signal of a magnetic distribution image.

Step S103: The magnetic distribution image obtained in step S101 is subjected to cross-overlap processing with the optical image obtained in step S102 to obtain a composite image of the detected valuable securities.

For example, if an area of the securities is optically scanned to obtain an avatar whose light image is a person, the magnetic distribution of the area of the securities is scanned to obtain a magnetic distribution image of the area, and then the optical image and magnetic distribution thereof are obtained. The image is subjected to cross-overlap processing to obtain a magnetic distribution image at an arbitrary position of the avatar. Such as the magnetic distribution at the ear, the magnetic distribution at the eye, and so on. It is obvious that the texture feature of a point on the composite image obtained in this step contains the magnetic distribution feature of the point and the characteristics of the light image of the point.

Step S104: Comparing the synthesized image of the detected securities with the composite image of the pre-stored real securities, determining whether the image features match, and if so, determining that the detected securities are genuinely valuable. Securities; otherwise, it is determined that the detected securities are false securities.

There are many specific implementations of image feature alignment. In a preferred embodiment, the texture features of the composite image of the detected securities are compared with the texture features of the pre-stored composite image of the real securities. , to determine whether the image features match.

When using texture features for matching, it is usually required that the scanning resolution of the magnetic distribution image and the light image acquisition can meet certain requirements, for example, 50-100 DPI.

In the present invention, in order to further reduce the workload, the composite image of the detected securities may be compared with the pre-stored composite image of the corresponding class of real securities according to the type of the securities to be detected, and the image is judged. Whether the features match. The categories referred to here generally refer to categories that are relatively easy to distinguish with the naked eye without relying on the detection of smart devices.

For example, securities can be classified according to country: RMB, French currency, US dollar, etc. Thus, when the renminbi is detected, it can be compared only to the composite image of the pre-stored renminbi real securities.

Of course, it is also possible to classify the securities according to the amount, such as numbers represented as 5, 10, 100, and the like.

Further, a variety of categories can be combined, such as RMB 5 yuan. This can be easily distinguished from the naked eye, and then it can be compared with a pre-stored composite image of 5 yuan of real securities.

The authenticity verification method of the securities in this embodiment acquires the magnetic distribution image and the light image of the detected securities, and cross-overlaps the two images to obtain a composite image, and the composite image and the real securities are Whether the image features of the contract image match and judge the authenticity of the securities, the detection result is more accurate than the magnetic detection method in the prior art.

2 is a schematic diagram showing an embodiment of an authenticity verification apparatus for a security provided by the present invention. As shown in FIG. 2, the apparatus includes: a magnetic distribution image scanning unit 201, an optical scanning unit 202, and an image synthesis unit. 204 and image comparison unit 203.

The magnetic distribution image scanning unit 201 scans the magnetic distribution of the detected securities to obtain a magnetic distribution image of the valuable securities. In practice, a full-scale magnetic distribution scan can be performed on the detected securities to obtain a full-scale magnetic distribution image. However, in practice, the valuable securities are often only a part of the area. In order to save the workload of magnetic distribution scanning, consideration may be considered. Only the magnetic distribution of the magnetic region of the detected securities is scanned to obtain a magnetic distribution image of the magnetic region of the securities. In practice, there is a problem of positioning of a magnetic region when scanning the magnetic distribution of the magnetic region of the value document, and for this purpose, the magnetic region determining unit 205 can also be added for determining the magnetic region position of the value document. The magnetic region determining unit 205 determines the location by at least two types. One solution is to directly find the location of the magnetic region corresponding to the current value of the securities according to the information of the magnetic region positions of the various securities that have been obtained. For example, the magnetic region position of the 5-yuan denomination banknote and the magnetic region position of the 10-yuan denomination banknote are known in advance, so that when a 5-yuan denomination banknote is actually scanned for magnetic distribution image, the magnetic region of the banknote can be quickly known. Position; another scheme is to determine the side by scanning: that is, scanning the securities on a line-by-line basis, and defining a boundary of the magnetic distribution image as a boundary of the magnetic region, thereby obtaining information of the magnetic region, the magnetic distribution image The boundary may be the smallest rectangular area capable of encasing the magnetic distribution image, or may be defined as the area between the first occurrence of the magnetic line and the last occurrence of the magnetic line.

Optical scanning unit 202 optically scans the detected value document to obtain a light image of the value document. The optical scanning here can be done by using visible light or by using invisible light (such as infrared light, ultraviolet light, etc.). In a specific implementation, the optical scanning unit 202 includes a visible light generator and a light receiver, wherein the visible light emitter emits visible light to the detected securities, and the light receiver receives reflections reflected from the detected valuable securities. Light, the visible light image signal of the detected securities is obtained.

The image synthesizing unit 204 cross-overlaps the magnetic distribution image obtained by the magnetic distribution image scanning unit 201 and the optical image obtained by the optical scanning unit 202 to obtain a composite image of the detected valuable securities.

The image comparison unit 203 compares the composite image of the detected securities with the composite image of the pre-stored real securities, determines whether the image features match, and if so, determines that the detected securities are true. Securities; otherwise, it is determined that the tested securities are false securities.

There are many specific implementations of image feature alignment. In a preferred embodiment, the image matching unit 203 passes the texture image of the composite image of the detected security document and the composite image of the pre-stored real securities. The texture features are compared to determine whether the image features of the magnetic distribution image and the light image match.

Fig. 3 is a block diagram showing a concrete implementation of the authenticity checking apparatus for the securities in the embodiment of Fig. 2. As shown in FIG. 3, the apparatus includes a casing 35, and a magnetic distribution image scanning unit 201' and an optical scanning unit 202' are arranged side by side along the width direction of the casing, and the magnetic distribution image scanning unit 201' is adjacent to the banknote exit direction. The optical scanning unit 202' is in the direction of the banknote entrance. The banknote 4 enters the authenticity check device from the entrance close to the side of the optical scanning unit 202', and performs optical scanning and magnetic distribution image scanning. Actually, in the present embodiment, the magnetic distribution image scanning unit 201' and the optical scanning unit 202' can be regarded as a combined sensor.

In the present embodiment, the image synthesizing unit and the image matching unit are integrated in the CPU 203'. The optical image signal output from the optical scanning unit 202' is sequentially subjected to amplification by the first amplifier 31 and analog-digital conversion by the first analog-to-digital converter 32, and then output to the CPU 203'. The magnetic distribution image signal output from the magnetic distribution image scanning unit 201' is sequentially subjected to amplification by the second amplifier 33 and analog-digital conversion by the second digital-to-analog converter 34, and then output to the CPU 203'.

In addition, the apparatus includes other mating units, such as rollers 36, to drive the securities forward.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

A method for authenticity verification of a securities, characterized in that the method comprises the steps in sequence:

(1) scanning a magnetic distribution of the detected securities to obtain a magnetic distribution image of the securities and optically scanning the detected securities to obtain a light image of the securities;

(2) performing a crossover process on the magnetic distribution image and the optical image to obtain a composite image of the valuable securities;

(3) comparing the composite image of the detected securities with the pre-stored composite image of the real securities, determining whether the image features of the two match, and if so, determining that the detected The price securities are genuine securities; otherwise, the detected securities are determined to be fake securities.
The method of claim 1 wherein said scanning a magnetic distribution of the detected value document to obtain a magnetic distribution image of said value document comprises: for a magnetic region of the detected value document Scanning the magnetic distribution to obtain a magnetic distribution image of the magnetic region of the value document;

Optically scanning the detected value document to obtain a light image of the value document comprises: optically scanning a magnetic region of the detected value document to obtain a light image of a magnetic region of the value document .
The method of claim 2, wherein the method further comprises determining a location of a magnetic region of the value document.
The method according to claim 1, wherein said comparing said composite image of said detected securities with a pre-stored composite image of real securities comprises:

A composite image of the detected valuable securities is compared with a composite image of a corresponding type of real valuable securities stored in advance based on the type of the detected securities.
The method according to claim 1, wherein comparing the composite image of the detected securities with the pre-stored composite image of the real securities, and determining whether the image features of the two match include:

The texture features of the composite image of the detected securities are compared with the texture features of the composite image of the real securities that are stored in advance, and it is determined whether the texture features of the two match.
An authenticity verification device for a securities, characterized in that the device comprises:

a magnetic distribution image scanning unit, configured to scan a magnetic distribution of the detected securities to obtain a magnetic distribution image of the valuable securities;

An optical scanning unit, configured to optically scan the detected securities to obtain a light image of the securities;

An image synthesizing unit configured to cross-overlap the magnetic distribution image and the optical image to obtain a composite image of the detected valuable securities;

An image comparison unit configured to compare the composite image of the detected securities with a pre-stored composite image of the real securities to determine whether the image features match, and if so, determine the detected The value-added securities are genuine securities; otherwise, the detected securities are determined to be false securities.
The apparatus according to claim 6, wherein said optical scanning unit comprises:

a visible light emitter for emitting visible light to the detected valued security;

And a light receiver for receiving reflected light reflected back from the detected value document to obtain a visible light image signal of the detected value document.
The apparatus according to claim 6, wherein said apparatus further comprises a first amplifier and a first analog to digital converter sequentially connected;

The first amplifier is configured to amplify a signal of the optical image output by the optical scanning unit;

The first analog-to-digital converter is configured to perform analog-to-digital conversion on the amplified signal of the optical image output by the first amplifier, and output the signal to the image synthesizing unit.
The apparatus according to claim 6, wherein said apparatus further comprises a second amplifier and a second analog to digital converter sequentially connected;

The second amplifier is configured to amplify a signal of the magnetic distribution image output by the magnetic distribution image scanning unit;

And a second digital-to-analog converter, configured to perform analog-to-digital conversion on the amplified signal of the magnetic distribution image output by the second amplifier, and output the signal to the image synthesizing unit.
The apparatus according to claim 6, wherein said image matching unit is configured to texture a texture image of said composite image of said detected securities and a texture of a composite image of pre-stored real securities The features are compared to determine whether the texture features of the two match.