KR20100000710A - Apparatus for counterfeit bill automatic detection and method for counterfeit bill automatic detection - Google Patents

Abstract

PURPOSE: An apparatus for automatically detecting counterfeit bill is provided to enhance accuracy of counterfeit detection by testing various security factors. CONSTITUTION: A main body(1) includes an opened bottom part. A receiving part(11) is formed inside the main body. A light source(2) is mounted to an inner circumference of a bottom end of the main body, and comprises a plurality of ultraviolet LEDs(23) which irradiates a light at a different angle and a plurality of LEDs(22a,22b,22c) which emits wavelength different from the ultraviolet LEDs. An imaging device(3) is mounted to a top end of the receiving part of the main body in order to photograph an image of a bill(7) for a test. An image processing device(4) determines the bill for a test by using the image photographed in the imaging device. A light source controller(5) controls the light source. A magnifying lens(6) is formed between the light source and the imaging device.

Description

Automatic counterfeit bill inspection device and automatic counterfeit bill inspection method {APPARATUS FOR COUNTERFEIT BILL AUTOMATIC DETECTION AND METHOD FOR COUNTERFEIT BILL AUTOMATIC DETECTION}

The present invention relates to a counterfeit bill inspection device and an inspection method, and more particularly, by inspecting various security elements such as UV fluorescence images, gifts, hidden lines, holograms and fine characters using only general LEDs and ultraviolet LEDs and cameras. The present invention relates to an automatic counterfeit bill inspection device and an automatic counterfeit bill inspection method for improving the reliability of the inspection.

Recently, as the economic situation worsens and the performance of image forming apparatuses such as a computer scanner, a color printer, a color copying machine, a laser beam printer, and a digital camera is greatly developed, the resolution of the image quality is also significantly advanced.

As a result, the currency of counterfeit bills or counterfeit securities made using the image forming apparatus capable of obtaining sophisticated images is increasing, and thus, counterfeit crimes are a serious social problem.

In order to prevent forgery of the banknotes, a paper difficult to be imitated by the general public was used, and a hidden picture and a partially exposed silver line were formed to prevent the paper from appearing or being reproduced as it is.

In addition, anti-counterfeiting is done through special inks or printing methods, such as holograms in which the pattern and color change depending on the viewing angle, intaglio printing that makes the user feel convex when touching certain parts, and clear when viewed at an angle. For example, there are Intaglio Latent Images that do not appear well in copies, and Micro Lettering, which does not reproduce as they are in copy.

In the case of manually inspecting the UV fluorescence image, gifts, hidden lines, holograms, and fine characters for the inspection of counterfeit bills, there is a disadvantage that the inspection takes a long time.

The counterfeit bill inspection technology for automatically discriminating such counterfeit bills has been disclosed in Korean Patent Laid-Open Publication No. 2004-0090056 entitled "Different Class Classification and Counterfeit Bill Identification Counter using CCD Image Sensor."

This technology uses a light source that irradiates bills on the opposite side of the CCD image sensor, a CCD image sensor that senses the image passing through the banknote, and a DSP processing unit that processes signals input from the CCD image sensor. Use the image to determine the authenticity of the bill.

Alternatively, when the banknote is irradiated with ultraviolet rays by using an ultraviolet light source that irradiates the banknote with ultraviolet rays, since the visible light of a specific wavelength band appears in the case of the printed banknote with the fluorescent image, the authenticity of the banknote is determined according to whether visible light is generated. .

However, in the case of this technology, the authenticity of the banknote can be determined by the existence of visible light generated according to the image transmitted through the banknote and UV irradiation, but if the fluorescent image is printed on the counterfeit banknote, the authenticity of the image is determined. There is a disadvantage that cannot be performed, and hologram inspection cannot be performed.

An object of the present invention is to determine the authenticity of banknotes, by using a general LED and ultraviolet LED to determine the fine characters through the image by the general LED illumination light, UV fluorescence image and hidden lines and gifts through the difference image of each image Provides an automatic counterfeit bill inspection device and an automatic counterfeit bill inspection method that enables to perform an efficient inspection on various security elements by performing a hologram inspection through an image obtained by irradiating illumination light from different angles. Is in.

The automatic counterfeit bill inspection device of the present invention, in the device for determining whether or not the forgery of the inspection banknote, the lower part is opened and the receiving portion is formed inside, and is mounted on the inner periphery of the lower end of the main body to irradiate light from different angles A light source composed of a plurality of ultraviolet LEDs and alternating with each of the ultraviolet LEDs, the light source including a plurality of LEDs emitting different wavelengths from the ultraviolet LEDs, and a photographing apparatus mounted on the main body accommodating part to photograph the image of the banknote for inspection; An image processor for determining whether the paper money for inspection is received by receiving the image photographed by the photographing apparatus; And a light source controller controlling ON / OFF of the light source.

An enlarged lens may be further provided between the light source and the photographing apparatus.

The image processor stores reference image data of pneumoconiosis, and the light source controller selectively turns on / off the LED or the ultraviolet LED, and the image processor selectively selects each of the LED and the ultraviolet LED. The authenticity of the inspection banknote is determined using the difference image of the photographed image in the ON / OFF state.

The image processor determines the authenticity of the inspection banknote by determining whether one or more selected from among a fluorescence image, a hidden line, or a gift is normal using the difference image.

Alternatively, the light source controller may be configured to irradiate light selectively at a plurality of angles to the inspection bill through sequential ON / OFF control of the plurality of LEDs, and the image processor may have a plurality of angles. The authenticity of the inspection paper money is determined from the acquired image by each light irradiated at, and the authenticity of the inspection paper money is to determine whether the hologram is matched through each reflected light image.

In addition, the automatic banknote inspection method according to the first aspect of the present invention, in the method of determining whether the forgery of the inspection banknotes by comparing the reference image data of the pneumoconiosis with the photographed image data of the inspection banknotes, ON) to turn off the ultraviolet LED and to take a first image; to turn off the LED and to turn on the ultraviolet LED to take a second image; Obtaining a difference image between the second image, comparing the difference image data with the reference image data, determining whether the UV fluorescence image and the hidden line are normal, and if the difference image data and the reference image data coincide with each other, And determining that the counterfeit bill does not match.

In addition, the automatic counterfeit bill inspection method according to the second aspect of the present invention, in the method of determining whether or not the counterfeit bill for inspection by comparing the reference image data of the pneumoconiosis and the photographed image data of the bill for inspection, turn on the LED (ON) and capturing the first image by turning off the ultraviolet LED, and comparing the first image with reference image data to determine whether the microcharacters of the banknote for inspection match. If it does not match, determining as a counterfeit bill, and if the microcharacters match, turning off the LED and turning on an ultraviolet LED to take a second image, and the first image and the Obtaining a difference image between the second image, comparing the difference image data with the reference image data to determine whether the UV fluorescence image and the hidden line are normal, and the UV fluorescence image and the hidden line are one If it does not include the step of determining a counterfeit bill.

The first and second aspects of the present invention may further include checking whether the gift is normal using the difference image data, and determining that the gift is counterfeit if the gift is not normal.

In addition, when the gift is not normal, the step of photographing the image by controlling any one of the LEDs of different angles (ON) sequentially, and hologram by comparing the image data and the reference image data taken from different angles The method may further include determining whether the coincides with the coincidence, and determining that the hologram coincides with the coincidence as a result of the coincidence.

According to the present invention, by inspecting a variety of security elements, such as fluorescence image of the banknote and silver line and silver inspection and hologram inspection through the simple configuration of the general LED, UV LED and camera, forgery detection accuracy to improve the reliability of the forgery There is an effect that can prevent social confusion caused by currency bills.

1 is a block diagram of an automatic counterfeit bill inspection device according to an embodiment of the present invention, the present invention relates to a device for determining whether or not forgery of the bill for inspection.

Referring to FIG. 1, the automatic counterfeit money inspection device of the present invention includes a main body 1, a light source 2, an imaging device 3, an image processor 4, and a light source controller 5. .

The main body 1 has a lower opening and a receiving portion 11 formed therein, and is a light blocking cover for blocking light from the outside.

The light source 2 is mounted on the lower inner periphery of the main body 1 and irradiates different bills of light to the inspection bills 7 at different angles, and includes a plurality of LEDs 21 and a plurality of ultraviolet (UV) LEDs ( 23).

Each LED 22 and each ultraviolet LED 23 are arranged alternately in the ring-shaped body 21, each LDE 21 emits light of a wavelength band different from the wavelength band emitted by the ultraviolet LED (23) It doesn't matter what you do.

Each of the LEDs 21 and each of the ultraviolet LEDs 23 is arranged to irradiate the banknote 7 for inspection with illumination light of different angles.

The photographing apparatus 3 is mounted on the upper end of the main body 1 accommodating portion 11 to photograph an image of the banknote 7 for inspection, and a CCD camera is used. In the embodiment of the present invention, the photographing device 3 is disposed above the vertical banknote for inspection, but may be arranged to have a predetermined angle through another modified embodiment.

The image processor 4 processes the image photographed by the photographing apparatus 3 and compares the photographed image data and the reference image data with each other to determine whether or not the test banknote 7 is abolished. It is.

In this case, the image photographed by the photographing apparatus 3 may be transmitted to the image processor 4 through a communication method such as the IEEE 1394 method.

The light source controller 5 controls ON / OFF of the light source, and selectively turns ON / OFF the LED or the ultraviolet LED. In this case, the light source controller 5 may transmit an ON / OFF control signal of the light source 2, that is, the LED 22 and the ultraviolet LED 23 in a communication method using RS 232.

According to such a configuration, the image processor 4 uses the difference image of the photographed images in the state where each of the LED 22 and the ultraviolet LED 23 are selectively turned on / off. Determine whether or not.

For example, the difference image is used to determine whether the ultraviolet fluorescence image or the hidden line or the silver is normal.

Alternatively, the light source controller 5 selectively irradiates light at a plurality of angles to the inspection banknote 7 through sequential ON / OFF control of the plurality of LEDs 22, and the image The processor 4 examines the hologram through the image of each reflected light irradiated from a plurality of angles to determine the authenticity of the check banknote.

Meanwhile, an enlarged lens 6 may be further provided between the light source 2 and the photographing apparatus 3 to enlarge the reflection image reflected by the banknote for inspection to be incident on the photographing apparatus 3.

Referring to the method using the automatic counterfeit money testing device of the present invention as follows.

The present invention relates to a method for determining whether or not forgery of a banknote for inspection by comparing the reference image data of pneumoconiosis with the photographed image data of the banknote for inspection.

First, the light source controller 5 controls the light source 2 so that illumination light is selectively irradiated on the surface of the banknote for inspection, and the photographing apparatus 3 captures an image of the banknote 7 for inspection according to the illumination light control. The image processor 4 receives the photographed image from the photographing apparatus 3 and compares the photographed image data with previously stored reference image data to determine whether it is pneumoconiosis.

As a first method for determining whether pneumoconiosis is performed by a fine character test.

For fine character inspection, the LED 22 is turned on and the ultraviolet LED 23 is turned off to capture an image of the inspection banknote 7 enlarged by the magnifying lens 6.

The photographed image data is compared with the reference image data to determine whether pneumoconiosis is performed through a micro character matching.

In addition, the second method may be performed by checking whether the UV fluorescence image silver line and the silver yarn is normal.

To this end, a difference image between the first image photographed by the irradiation of the LED 22 and the second image photographed by the ultraviolet LED 23 is used.

In other words, the first image is obtained by photographing the image of the banknote 7 for inspection by turning on the LED 22 and turning off the ultraviolet LED 23.

Then, the second image is obtained by turning off the LED 22 and turning on the ultraviolet LED and photographing the image of the banknote 7 for inspection.

Subsequently, after obtaining the difference image between the first image and the second image, the difference image data is compared with the reference image data to determine whether pneumonia is determined by determining whether the UV fluorescence image, the hidden line, or the silver is normal.

Here, the UV fluorescence image or the silver line is determined whether or not normal by matching, and the gift inspection may be performed by determining the presence or absence of the gift.

In this case, the number of gifts may be determined by labeling and storing the gift images of pneumoconiosis in the reference image data, and the number of labeled gifts may be examined by comparing whether the number of the gifts is equal to or greater than the number set by the pneumoconiosis.

As a third method for determining whether pneumoconiosis is performed by hologram inspection.

In order to inspect the hologram, the LED 22 irradiates the illumination banknotes with illumination light at different angles, and then uses respective photographed image data obtained at this time.

In detail, each image is taken by turning off the ultraviolet LED and sequentially controlling one of the LEDs 22 disposed at 0 °, 45 °, and 90 ° angles with respect to the banknote for inspection. do.

Then, by comparing the photographed image data with the reference image data to determine whether the pneumoconiosis through determination.

That is, since the hologram changes the pattern and color according to the viewing angle, it is preferable that the LED 22 irradiate the illumination light at a predetermined angle with respect to the banknote 7 for inspection.

The inspection method using the above-described automatic counterfeit bill inspection device is implemented through various embodiments as follows.

Figure 2 is a first embodiment showing the automatic counterfeit money test method of the present invention sequentially.

Referring to FIG. 2, first, the LED 22 is turned on, and the ultraviolet LED 23 is turned off to take a first image (S10).

Then, the LED 22 is turned off and the ultraviolet LED 23 is turned on to take a second image (S20).

Next, a difference image between the first image and the second image is obtained (S30).

In operation S40, the difference image data is discriminated from the reference image data and the UV fluorescence image or the hidden line.

If the UV fluorescence image and the hidden line does not match, it is determined as a counterfeit bill (S90).

Here, in the first embodiment of the present invention, when the UV fluorescence image or the silver line coincides, it may be determined as pneumoconstriction, and more precise inspection may be performed through the following steps.

That is, when the UV fluorescence image and the silver line coincide, it is determined whether the silver is normal (S50). Here, the gift matching test is performed by determining whether there is a gift or whether the number of gifts matches or whether the number of gifts is greater than or equal to the reference value.

If the gift is not normal, it is determined as a counterfeit bill (S90).

At this time, the banknote for inspection may be determined as puffiness without the hologram inspection process described later.

Subsequently, when the number of gifts coincides, the UV LED is turned off, and the LED is turned off only at one of the angles of LEDs of different angles, that is, 0 ° LEDs 22a, 45 ° (22b), and 90 ° (22c). Each image is photographed by controlling sequentially to be ON (S60).

In addition, the holographic inspection is performed by comparing the photographed image data with the reference image data to determine whether the holograms match.

If the hologram does not match, it is determined as a counterfeit bill (S90), and if it is matched, it is finally determined to be pneumatic (S80).

Figure 3 is a second embodiment showing the automatic counterfeit money test method of the present invention in sequence.

Referring to FIG. 3, first, the LED 22 is turned on, and the ultraviolet LED 23 is turned off to take a first image (S100).

In operation S200, it is determined whether the first character image data is matched with the fine character through mutual comparison with the reference image data.

If the result of the fine character match is not matched, it is determined as counterfeit bill (S190), and if the fine character is matched, it is determined to be puffed, or the LED 22 is turned off and the ultraviolet LED 23 is turned on. In operation S120, the second image is captured.

Subsequently, a difference image between the first image and the second image is obtained (S130).

Then, by comparing the difference image data with the reference image data, it is determined whether the UV fluorescence image or the hidden line match (S140).

If the UV fluorescence image and the hidden line does not match, it is determined as a counterfeit bill (S190).

In addition, if the UV fluorescence image and the silver line coincides with the normal determination of the silver (S150).

The normality test of the gift is performed by the presence or absence of the gift or by comparing the number or more than the reference value of the number, and if the gift is not normal through it is determined as counterfeit money (S190).

Subsequently, if the gift is normal, it is determined as puffing, or the ultraviolet LED is turned off, and the LED is turned on only at one of the angles of 0 ° (22a), 45 ° (22b), and 90 ° (22c) LEDs 22. Each image is photographed by controlling sequentially so as to be turned on (S160).

Then, the holographic inspection is performed by comparing the captured image data with the reference image data (S170).

If the hologram does not coincide with the hologram, it is determined as counterfeit money (S190), and when it is matched, it is finally determined as puffiness (S180).

1 is a block diagram of an automatic counterfeit bill inspection device according to an embodiment of the present invention.

Figure 2 is a first embodiment showing the automatic counterfeit money test method of the present invention sequentially.

Figure 3 is a second embodiment showing the automatic counterfeit money test method of the present invention sequentially.

<Description of the symbols for the main parts of the drawings>

1: main body

11: receiving part

2: light source

21: body

22: LED

22a: 0 ° LED, 22b: 45 ° LED, 22c: 90 ° LED

23: UV LED

3: shooting device

4: Image processor

5: light source controller

6: magnifying lens

7: banknote for inspection

Claims (10)

In the device for determining whether the forgery of the inspection banknotes, A lower portion of the main body having an opening therein; A light source mounted on an inner circumferential edge of the main body, the plurality of ultraviolet LEDs irradiating light from different angles, and alternately disposed with each of the ultraviolet LEDs, and the plurality of LEDs emitting different wavelength bands from the ultraviolet LEDs; A photographing apparatus mounted on an upper end of the main body accommodating part to photograph an image of the banknote for inspection; An image processor for determining whether a banknote for inspection is abolished by receiving the image photographed by the photographing apparatus; And Automatic counterfeit money testing device comprising a light source controller for controlling the on (ON) / off (OFF) of the light source. The method of claim 1, An automatic counterfeit bill inspection device, characterized in that an enlarged lens is further provided between the light source and the photographing device. The method according to claim 1 or 2, The image processor stores reference image data of pneumoconiosis, The light source controller selectively turns on / off the LED or the ultraviolet LED, The image processor automatically counterfeit money, characterized in that for determining whether or not the authenticity of the bill for inspection using the difference image of the photographed image in the state that each of the LED and the ultraviolet LED selectively (ON) / OFF (OFF) Inspection device. The method of claim 3, wherein And the image processor determines whether or not the authenticity of a banknote for inspection is determined by determining whether one or more selected from among a fluorescence image, a silver line, or a gift using the difference image. The method of claim 4, wherein The light source controller is configured to irradiate light selectively at a plurality of angles with respect to the inspection banknote through sequential ON / OFF control of the plurality of LEDs, The image processor is automatic counterfeit money testing device characterized in that for determining the authenticity of the inspection banknote from the acquired image by each light irradiated from a plurality of angles. The method of claim 5, The authenticity of the inspection banknote is automatic counterfeit money testing device, characterized in that for determining whether the hologram match through each reflected light image. In the method for judging whether the forged banknotes forgery by comparing the reference image data of the pneumoconiosis with the photographed image data of the banknotes for inspection, Turning on the LED and turning off the ultraviolet LED to take a first image; Turning off the LED and turning on the ultraviolet LED to take a second image; Obtaining a difference image between the first image and the second image; Comparing the difference image data with the reference image data to compare whether the UV fluorescence image and the hidden line match each other; And Determining that the difference image data and the reference image data coincide with each other and determine that the difference image data is counterfeit money; Automatic counterfeit bill inspection method comprising the. In the method for judging whether the forged banknotes forgery by comparing the reference image data of the pneumoconiosis with the photographed image data of the banknotes for inspection, Turning on the LED and turning off the ultraviolet LED to take a first image; Comparing the first image with reference image data to determine whether the microcharacters of the banknote for inspection match; Determining the counterfeit bill if the microcharacters do not match; Photographing the second image by turning off the LED and turning on the ultraviolet LED when the microcharacters match; Obtaining a difference image between the first image and the second image; Comparing the difference image data with the reference image data to determine whether the UV fluorescence image and the hidden line match each other; And If the UV fluorescence image and the hidden line does not coincide with the counterfeit bill characterized in that it comprises a step of determining the counterfeit bill. The method according to claim 7 or 8, Determining whether or not the gift is normal in the difference image data and the data stored in the reference image data; If the gift is not normal automatic counterfeit money testing method characterized in that it further comprises the step of determining the counterfeit money. The method of claim 9, Photographing images by sequentially controlling one of LEDs of different angles when the gifts are normal; Comparing the image data photographed at different angles with the reference image data to determine whether the holograms match; And determining if the holograms coincide with each other as a result of the determination and determining counterfeit money if the holograms do not match.

Images