KR20080083992A - Paper money certifying device and certifying method thereof - Google Patents

Abstract

A paper money certifying device and a certifying method thereof are provided to reduce a memory for storing genuine paper money by eliminating a process for comparing an inputted image with image data of the genuine paper money. An image pickup unit(11) photographs an image of paper money. An enlargement unit(13) enlarges the image photographed by the image pickup unit. A pattern analysis unit(17) searches at least one contrast region of brightness, saturation, and color tone with respect to the image enlarged by the enlargement unit and analyzes a floating pattern of a contrast boundary line of the searched contrast region. A genuine/spurious paper money discrimination unit(19) discriminates genuine paper money from spurious paper money on the basis of the floating pattern of the contrast boundary line analyzed by the pattern analysis unit.

Description

Paper money certifying device and certifying method

1 is a block diagram schematically showing a first embodiment of a banknote recognizing apparatus according to the present invention;

2 is a flowchart illustrating a banknote recognition method by the banknote recognizing apparatus of FIG. 1;

3 is a view showing an example of an area enlarged by the enlarged portion of FIG. 1, FIG. 3A is a view showing an example of the image of pneumoconiosis, FIG.

FIG. 4 is a view showing an enlarged area when K and M in M, C, Y, and K are removed with respect to the area enlarged by the enlarged part of FIG. 1, and FIG. 4b shows an example of a forged banknote image,

FIG. 5 is a view illustrating an enlarged area when K and C in M, C, Y, and K are removed with respect to the area enlarged by the enlarged part of FIG. 1, and FIG. 5b shows a forged banknote image,

6 is a view showing an example of the flow pattern of the contrast boundary line, Figure 6a is a view showing an example of the flow pattern of the contrast boundary line of the genuine image, Figure 6b shows a flow pattern of the contrast boundary line of the forged banknotes drawing,

7 is a block diagram schematically showing a second embodiment of the banknote recognizing apparatus according to the present invention;

8 is a flowchart illustrating a banknote recognition method by the banknote recognizing apparatus of FIG. 7;

9 is a block diagram schematically showing a third embodiment of the banknote recognizing apparatus according to the present invention;

10 is a flowchart illustrating a banknote recognition method by the banknote recognizing apparatus of FIG. 9, and

FIG. 11 is a view illustrating a banknote recognition method of FIG. 10.

Explanation of symbols on the main parts of the drawings

10, 20, 30: bill recognition device 11, 21, 31: the imaging unit

13, 23, 33: Enlarged portion 15: Basic primary color remover

17, 27: pattern analysis unit 19, 29, 37: pneumonia determination unit

25: image conversion unit 35: comparison unit

The present invention relates to a banknote recognizing apparatus and a method of recognizing the same, and more particularly, to a banknote recognizing apparatus and a method for recognizing authenticity of a banknote by discriminating whether a counterfeit or a tamper is made by a copy machine, a scanner, a printer, or the like. It is about.

In recent years, with the rapid development of computer science, as the performance of advanced equipment such as printers, scanners, digital cameras, and the like, forgery or modulation technologies such as general documents, securities, and various certificates have been developed day by day.

Here, forgery means that an unauthorized person makes a document, securities, or various documents similar or identical to the originals of documents, securities, or various proof documents. Documents, securities, or various certificates printed or copied directly by using a scanner, printer, or copying machine correspond to counterfeit documents, counterfeit securities, or various counterfeit documents.

In addition, the alteration means that an unauthorized person changes the appearance of the document, the securities, or the originals of various proof documents by changing the contents. This includes changing the face value of a security from low to high, changing the issue date or interest payment date to increase the value of the security, or changing certain parts such as the name of various certificates.

With the development of printing technologies by copiers, scanners, printers, and the like, images printed by these devices, securities, or various certificates are also similar to genuine products that are almost impossible to visually identify. In particular, since the color, shape, shape, etc. are printed to the extent that they are very similar to the originals, counterfeiting or tampering of documents, securities, etc. is increasing.

When a banknote is forged or tampered with by a printing technology such as a copy machine, a scanner, a printer, or the like, there is a problem of causing great confusion not only in the national economy, but also in the national order and the entire commercial order.

The present invention was devised to solve the above problems, and an object of the present invention is to provide a banknote recognition device for authenticating the authenticity of an image by determining whether the banknote is forged or tampered with a copy machine, a scanner, a printer, or the like, and an authentication method thereof. It is done.

A first embodiment of the banknote recognizing apparatus according to the present invention for achieving the above object comprises: an imaging unit for imaging an input banknote; An enlargement unit for enlarging an image captured by the imaging unit; A pattern analyzer searching for at least one contrast area among brightness, saturation, and color with respect to the image enlarged by the enlarger, and analyzing a flow pattern of contrast boundary lines in the searched contrast area; And a pulmonary determination unit that determines whether the input bill is genuine or not based on the flow pattern of the contrast boundary line analyzed by the pattern analyzer.

Preferably, the enlarger enlarges the captured image at a rate that can identify at least 300 dots per inch with respect to an image printed by at least one of a printer, a copier, and a scanner.

Alternatively, the banknote recognizing apparatus further includes an image conversion unit for converting the image enlarged by the enlargement unit into black and white. In this case, the pattern analyzer may search for at least one contrast area of brightness and saturation of the black and white image converted by the image converter, and analyze the flow pattern of the contrast boundary line in the searched contrast area.

Alternatively, the image pickup unit of the banknote recognizing apparatus captures the input banknote in black and white, and the pattern analyzer retrieves at least one contrast area of brightness and saturation for the black and white image captured by the image pickup unit, It may be implemented to analyze the flow pattern of the contrast boundary line in the contrast region.

Alternatively, the banknote recognizing apparatus may include at least one primary primary color among M (Magenta), C (Cyan), K (blacK), and Y (Yellow) for the image enlarged by the enlargement unit. The apparatus may further include a primary primary color removing unit that removes the primary color primary, and the pattern analyzer searches for a contrast area of at least one of brightness, saturation, and color of the image from which the primary primary color is removed by the primary primary color removing unit. It may be implemented to analyze the flow pattern of the contrast boundary line in the contrast region.

Alternatively, the banknote recognizing apparatus removes a primary primary color that removes at least one primary primary color among the primary colors distinguished by R (Red), G (Green), and B (Blue) with respect to the image enlarged by the enlargement unit. The pattern analysis unit may further include: searching for a contrast area of at least one of brightness, saturation, and color with respect to the image from which at least one primary color is removed by the primary color removing unit, and comparing the searched contrast area with each other. It may be implemented to analyze the flow pattern of the boundary line.

Preferably, the pattern analyzer determines whether the flow pattern of the contrast boundary line fluctuates at least one dot interval. In this case, when it is determined that the flow pattern of the contrast boundary line analyzed by the pattern analyzer is fluctuated at least one dot interval, it is preferable to determine that the input bill is forged or modulated. .

On the other hand, the bill recognition device, the step of photographing the input bills; Enlarging the image picked up by the imaging step; Searching for at least one contrast area among brightness, saturation and color of the image enlarged by the enlargement step; Analyzing a flow pattern of a contrast boundary line in the contrast area searched by the contrast area search step; And determining whether the input banknote is genuine based on the flow pattern of the contrast boundary line analyzed by the pattern analysis step.

Here, in the enlargement step, it is preferable to enlarge the photographed image at a rate that can identify at least 300 dots per inch with respect to an image printed by at least one of a printer, a copier, and a scanner.

Preferably, the banknote recognition method further comprises the step of converting the image enlarged by the enlargement step into a black and white image. In this case, the contrast area searching step may search for at least one contrast area of brightness and saturation with respect to the black and white image converted by the image converting step.

Alternatively, the imaging step may be configured to capture the input bill in a black and white image, and the contrast area searching step may be implemented to search for at least one contrast area of brightness and saturation with respect to the black and white image captured by the imaging step. .

In addition, the banknote recognition apparatus, at least one of the primary primary colors of M (Magenta), C (Cyan), K (blacK), Y (Yellow) for the image enlarged by the enlargement step It is preferable to further include the step of removing. In this case, the contrast area searching step may search for at least one contrast area among brightness, saturation and color of the image from which at least one primary primary color is removed by the primary primary color removing step.

Alternatively, the banknote recognizing apparatus may further include removing at least one primary primary color among the primary primary colors R (Red), G (Green), and B (Blue) with respect to the image enlarged by the enlargement step. You may. In this case, the contrast area searching step may search for at least one contrast area among brightness, saturation and color of the image from which at least one primary primary color is removed by the primary primary color removing step.

Preferably, the pattern analysis step, it is determined whether the flow pattern of the contrast boundary line fluctuates at least one dot interval. In this case, the authenticity determining step is to judge that the input bill is forged or modulated when it is determined that the flow pattern of the contrast boundary line analyzed by the pattern analysis step is fluctuated at least one dot interval. desirable.

A second embodiment of the banknote recognizing apparatus according to the present invention for achieving the above object, the image pickup unit for picking up the input bill; An enlargement unit for enlarging an image captured by the imaging unit; A comparison unit for comparing the brightness or saturation with respect to the image enlarged by the expansion unit with respect to the peripheral point spaced apart at intervals within a dot radius around an arbitrary reference point; And a pneumococcal determination unit that determines whether the input bill is genuine or not according to whether the brightness or saturation compared by the comparison unit is the same.

Here, when the compared brightness or saturation of the reference point and the peripheral point are different from each other, the comparison unit may compare the second peripheral point with the reference point of the distance extended at equal intervals from the reference point toward the peripheral point. It is desirable to compare lightness or saturation.

In this case, the pneumococcal determination unit preferably determines that the input bill is forged or modulated when the compared brightness or saturation of the reference point and the second peripheral point is different.

Preferably, the comparison unit compares the peripheral points in the upper, lower, left, right, upper left, upper right, lower left, lower right of the predetermined interval with respect to the reference point.

On the other hand, the banknote recognizing apparatus according to the second embodiment, the step of photographing the input bills; Enlarging the image picked up by the imaging step; Comparing brightness or saturation with respect to an image enlarged by the enlargement step with a peripheral point separated by an interval within a dot radius about an arbitrary reference point; And determining whether the input bill is genuine or not according to whether the brightness or the saturation are the same compared by the comparison step.

Here, in the comparing step, when the brightness or saturation of the reference point and the peripheral point are different from each other, the brightness of the second peripheral point and the reference point of the distance extended at equal intervals from the reference point toward the peripheral point or It is desirable to compare the saturation.

In addition, in the authenticity determination step, it is preferable to determine that the input bill is forged or altered when the brightness or saturation of the reference point and the second peripheral point are different.

Preferably, the comparing step compares the peripheral points at the upper, lower, left, right, upper left, upper right, lower left and lower sides of a predetermined interval with respect to the reference point.

Thus, the banknote recognizing apparatus and the method of recognizing the same according to the present invention can accurately determine whether the banknote inputted is genuine by accurately discriminating whether the banknote is forged or tampered by a copy machine, a scanner, a printer, or the like.

Hereinafter, with reference to the accompanying drawings will be described in detail the banknote recognition apparatus and its recognition method according to the present invention.

1 is a block diagram schematically showing a first embodiment of a banknote recognizing apparatus according to the present invention. Referring to the drawings, the banknote recognizing apparatus 10 according to the first embodiment includes an image capturing unit 11, an enlargement unit 13, a pattern analyzing unit 17, and a pneumatic determination unit 19. Also, the banknote recognizing apparatus 10 according to the first embodiment may further include a basic primary color removing unit 15.

The imaging unit 11 picks up the bill inputted to the bill recognition device 10. At this time, the imaging unit 11 has a preset coordinate value area for the banknote input to the banknote recognizing apparatus 10, for example, X-axis coordinate values X1 to X2 in the travel direction of the banknote, and Y-axis coordinate values Y1 to Y2. It is preferable to implement to image the area according to.

The magnification part 13 enlarges the image picked up by the imaging part 11. At this time, it is preferable that the enlarger 13 enlarges the captured image so that 300 dots per inch or more can be identified with respect to an image printed by a printer, a copier, a scanner, or the like. That is, in the case where the area picked up by the imaging unit 11 is 1 inch in width and length, it is preferable to enlarge the picked up area so that 300 dots or more can be identified within the range. This is in mind that recent copiers, scanners, printers, and the like have a resolution of 300 dpi (dot per inch) or more, and the magnification enlarged by the enlargement section 13 can be varied.

The primary primary color removing unit 15 includes at least one primary primary color among M (Magenta), C (Cyan), K (blacK), and Y (Yellow) for the image enlarged by the enlargement unit 13. Remove it. This is to keep in mind that the image produced by the printer is usually a combination of the primary colors of M, C, Y and K.

Alternatively, the primary primary color removing unit 15 may be implemented to remove at least one primary primary color among the primary primary colors distinguished by R (Red), G (Green), and B (Blue). This is to keep in mind that the image produced by the scanner is usually a combination of the primary colors of R, G and B.

The pattern analyzer 17 searches for a contrast area with respect to the image enlarged by the enlarger 13, and analyzes the flow pattern of the contrast boundary line in the contrast area. Here, the contrast area refers to an area in which at least one of brightness, saturation, and color is significantly different from the image. Here, in terms of brightness and saturation, it is preferable to determine a region having a difference of 100 or more within a gradation range of 0 to 255 as a contrast region. In this case, the difference in the gray scale value for determining the contrast area is not limited thereto, and may be changed to various values. In addition, the contrast boundary line refers to a boundary line between color and color, a boundary line in which the brightness value changes markedly, or a boundary line in which the saturation value changes significantly with respect to the contrast area.

In order to easily determine the contrast boundary line between the color and the color, the banknote recognition device 10 preferably further includes a basic primary color removing unit 15. When the primary primary color of at least one of M, C, K, and Y, or at least one primary primary of R, G, and B is removed by the primary primary color removing unit 15, the pattern analyzer 17 may include at least one element. The contrast region of the color can be easily searched for the region from which the primary primary color is removed, and thus the flow pattern of the contrast boundary line can be easily analyzed.

The pulverization determination unit 19 determines whether the banknote inputted to the banknote recognizing apparatus 10 is authentic based on the flow pattern of the contrast boundary line analyzed by the pattern analyzer 17.

2 is a flowchart illustrating a banknote recognition method by the banknote recognizing apparatus of FIG. 1. The function and operation of the banknote recognizing apparatus according to the first embodiment of the present invention will be described in detail with reference to the drawings.

The imaging unit 11 picks up the paper money received by the paper money recognition device 10 (S101). At this time, it is preferable that the imaging unit 11 picks up a predetermined area according to a preset range of X-Y coordinate values for the input banknote. Further, in view of the fact that recent printers, copiers, scanners, and the like print at a resolution of 300 dots or more per inch, the imaging unit 11 preferably has a precision that can distinguish at least 300 dots or more per inch.

The expansion unit 13 enlarges the image picked up by the imaging unit 11 (S103). At this time, it is preferable that the enlargement unit 13 can enlarge the image captured by the imaging unit 11 to the extent that can distinguish at least 300 dpi or more based on the case of the image printed by the printer or the scanner. Do.

3 is a view showing an example of an image enlarged by the enlargement unit 13, FIG. 3A shows an example of a pneumatic image, and FIG. 3B shows an example of a forged banknote image. Here, the term "pulse" refers to a bill that has not been forged or tampered with. As can be seen from FIG. 3A, the image is made up of vectors since the image of pneumoconstriction is printed by a copying machine or a printing plate. On the contrary, a document forged or modulated by a printer, copier, scanner, or the like is composed of a primary color of M, C, K, Y, or a combination of primary colors of R, G, and B as shown in FIG. 3B. At this time, the basic primary colors of M, C, K, Y or R, G, B are each composed of circular dots.

The pattern analyzer 17 searches for a contrast area, that is, an area in which a difference in brightness, saturation, or color is prominent with respect to the image enlarged by the enlarger 13 (S107), and the flow of the contrast boundary line. The pattern is analyzed (S109). At this time, the image itself printed by an image forming apparatus such as a printer, a copying machine, a scanner, etc., is made of a combination of M, C, K, Y or basic primary colors of R, G, and B as in the case of FIG. Even when the image is enlarged, the contrast area may not be noticeable. Therefore, in order to facilitate analysis of the contrast area, the banknote recognizing apparatus 10 may remove the primary primary color by the primary primary color removing unit 15 before the search of the contrast area by the pattern analyzer 17. It is preferred to be implemented.

The primary primary color removing unit 15 removes at least one primary primary color among the primary primary colors M, C, K, and Y in order to easily distinguish the contrast area with respect to the image enlarged by the enlarger 13. (S105). Alternatively, the primary primary color removing unit 15 may be implemented to remove at least one primary primary color among R, G, and B primary colors for the image enlarged by the enlarger 13. 4 is an enlarged image of a case in which K and M in M, C, Y, and K are removed from the image enlarged by the enlargement unit 13, and FIG. 4A shows a pneumoconiosis image, and FIG. 4B shows a forgery. Banknote image. 5 illustrates an enlarged area when K and C in M, C, Y, and K are removed with respect to the image enlarged by the enlargement unit 13, and FIG. 5A illustrates a pneumothorax image. Shows a forged banknote image. As shown in FIGS. 4 and 5, the primary primary color removing unit 15 removes at least one primary primary color of M, C, Y, and K or at least one primary primary color of R, G, and B, thereby removing an image. It can be seen that the contrast area of color with respect to the enlarged area of is clearly visible.

The pattern analyzer 17 analyzes the contrast region of the color in the region enlarged by the enlarger 13 or the region in which at least one primary primary color is removed by the primary primary color remover 15, and analyzes the contrast region of the color. Analyze the flow pattern of the contrast boundary line for (S109).

6 is a view showing an example of the flow pattern of the contrast border line, Figure 6a shows an example of the flow pattern of the contrast border line of the pulmonary image, Figure 6b shows the flow pattern of the contrast border line of the forged banknote image.

Images printed by printers, copiers, scanners, etc. consist of a combination of the primary colors of R, G, and B, or a combination of the primary colors of M, C, Y, and K. Each of the primary colors is printed in dots (dots). Each of the mesh scores is adjusted to adjust the color, brightness, and saturation of the image. Thus, when an image printed by a printer, copier, scanner, etc. is enlarged to be able to identify more than 300 dots per inch, the contrast boundary line exhibits an irregular flow pattern due to the dots of the respective primary colors.

On the other hand, the image of the pneumoconiosis is reflected by a plate of the primary primary colors of R, G, and B or a plate of the primary primary colors of M, C, Y, and K, and the image of the pneumoconvertized by the primary primary of the primary plate is bounded by contrast. The line will show a regular flow pattern.

Referring to the drawings, it can be seen that in the case of the pneumoconiosis image, the flow range of the contrast boundary line is smoothly continued without departing from a certain range. However, in the case of the forged bill image, it can be seen that the contrast boundary line flows out of a certain range. In this case, the counterfeit or modulated banknote image flows at least one dot interval with respect to the direction in which the line continues, and if the at least one primary primary color is removed by the primary primary color removing unit 15, the size of the flow interval becomes larger. do. The pattern analyzer 17 determines whether the contrast boundary line is out of a certain flow range by analyzing the size of the flow interval of the contrast boundary line (S111). At this time, the maximum value of the flow range is preferably set to one dot interval or more than one dot interval.

The pulmonary determination unit 19 determines whether the image received by the banknote recognition device 10 is authentic according to whether the flow pattern of the contrast boundary line analyzed by the pattern analyzer 17 is out of a certain flow range. . That is, when the flow of the color contrast line is out of the preset flow range by the pattern analyzer 17, the pneumoconductor determination unit 19 determines the obtained image as a forged or modulated banknote (S113). In addition, if the flow of the contrast boundary line by the pattern analysis unit 17 is within a predetermined flow range, the authenticity determination unit 19 determines the bill inputted to the bill recognition device 10 as genuine (S115).

As a result, the banknote recognizing apparatus 10 may determine whether puffing is immediately performed without a procedure of comparing the banknote input to the banknote recognizing apparatus 10 with data of a separately stored puffing image.

7 is a block diagram schematically showing a second embodiment of the banknote recognizing apparatus according to the present invention. Referring to the drawings, the banknote recognition device 20 includes an image capturing unit 21, an enlargement unit 23, a pattern analyzing unit 27, and a pneumoconductor judging unit 29. Preferably, the banknote recognition device 20 further includes an image converter 25. Here, the image capturing unit 21, the magnifying unit 23, the pattern analyzing unit 27, and the pulverization determining unit 29 are the image capturing unit 11 and the enlarged unit of the banknote recognizing apparatus 10 according to the first embodiment. (13), since the structure and function are the same as that of the pattern analyzer 17 and the pneumoconductor 19, the description thereof will be omitted below.

The image converter 25 converts the image enlarged by the enlarger 23 into a monochrome image or a monochrome image. In the above description, the contrast area for the color is easily performed by removing the primary primary color of at least one of M, C, K, and Y or at least one primary color of R, G, and B. Determination of the contrast area is not easy by the method of removing the primary primary color. To this end, the image converter 25 converts the color image picked up by the imaging unit 21 into a black and white image or a monochromatic image to facilitate determination of a contrast area for brightness or saturation.

As a result, the pattern analyzer 27 may easily search for a contrast area of brightness or saturation with respect to the image converted into the monochrome image or the monochrome image.

8 is a flowchart illustrating a banknote recognition method using the banknote recognizing apparatus of FIG. 7. Referring to the drawings, as in the banknote recognition apparatus 10 according to the first embodiment, the imaging unit 21 captures an image of a banknote input to the banknote recognition apparatus 20 (S201), and the enlargement unit 23 The image picked up by the imaging unit 21 is enlarged (S203).

The image converter 25 converts the image enlarged by the enlarger 23 into a monochrome image or a monochrome image embodied in any one of the primary colors (S205). By image conversion by the image converter 25, the image enlarged by the enlarger 23 is converted into an image having only lightness and saturation without difference in color.

The pattern analyzer 27 searches for a contrast area in which the brightness or saturation value is prominent for the monochrome image or the monochrome image converted by the image conversion unit 25 by a predetermined gray scale value (S207), and contrast in the contrast area. The flow pattern of the boundary line is analyzed (S209). At this time, the pattern analysis unit 27 is based on a predetermined brightness or saturation difference value with respect to the brightness or saturation value having a range of 0 to 255. For example, if the difference between the preset brightness or saturation value is 100, the brightness or The region where the saturation value changes by a difference of 100 or more is searched as a contrast region, and the flow pattern of the contrast boundary line in the contrast region is analyzed. Since the steps S211 to S215 for the subsequent analysis process of the flow pattern of the contrast boundary line and the process of determining the attenuation are the same as the above-described steps S111 to S115, description thereof will be omitted.

As a result, the banknote recognition device 20 may determine whether the banknotes are immediately depleted without comparing the bills inputted to the banknote recognition device 20 with the data of the separately stored pulmonary images based on the change in brightness or saturation. do.

9 is a block diagram schematically showing a third embodiment of the banknote recognizing apparatus according to the present invention.

Referring to the drawings, the banknote recognizing apparatus 30 according to the third embodiment includes an image capturing unit 31, an enlarged unit 33, a comparator 35, and a puffing judging unit 37.

The imaging unit 31 picks up a predetermined area of the image obtained by the banknote recognition device 30. In addition, the enlargement section 33 enlarges the area picked up by the imaging section 31. Image capturing by the image capturing unit 31 and image magnification by the expanding unit 33 are the same as those in FIGS. 1 and 7 described above, and thus a detailed description thereof will be omitted.

The comparison unit 35 compares the brightness or saturation with respect to the image enlarged by the enlarger 33 and the peripheral points that are separated at intervals within a dot radius around an arbitrary reference point. Here, the dot radius refers to the radius of the dot with respect to the image printed by a printer, scanner, copier, or the like.

The puffing judging unit 37 determines whether the banknotes input to the banknote recognizing device 30 are genuine according to whether the brightness or the saturation of the comparison unit 35 are the same.

FIG. 10 is a flowchart illustrating a banknote recognition method using the banknote recognizing apparatus of FIG. 9. The function and operation of the banknote recognizing apparatus 30 according to the third embodiment will be described in detail with reference to the drawings.

The imaging unit 30 captures a predetermined area with respect to the banknote input to the banknote recognizing device 30 (S301), and the expansion unit 33 enlarges the captured area (S303). Image capturing by the imaging unit 30 and image magnification by the enlarging unit 33 are the same as those in FIGS. 1 and 7 described above.

The comparison unit 35 compares the brightness or saturation with respect to the image enlarged by the enlarger 33 and the peripheral points that are separated at intervals within a dot radius around an arbitrary reference point (S305). At this time, the reference point is preferably set to the point with the highest brightness or saturation among the images enlarged by the enlarger 33.

In general, when a banknote input to the banknote recognizing device 30 is a banknote printed by a printer, a scanner, a copying machine, or the like, each printing area of the banknote is formed by combining dots of a plurality of basic primary colors as shown in FIG. Make up one dot. FIG. 11 illustrates a case where nine dots of primary primary colors combine to form one dot. Here, one dot is made of a regular overlapping of each dot, but the combination of the dots is made irregular, the number of primary primary dots constituting one dot is not constant.

At this time, when the banknote input to the banknote recognition device 30 is made of a combination of dots of each primary primary color, that is, forged or modulated banknotes, the peripheral space separated from the reference point A and its peripheral point at intervals within the dot radius The brightness or saturation at point B is different. The banknote recognizing apparatus 30 according to the third embodiment of the present invention uses this point to determine whether the banknote inputted to the banknote recognizing apparatus 30 is genuine. At this time, the comparison unit 35 of the banknote recognition device 30 preferably compares the peripheral points B located at the top, bottom, left, right, top, left, bottom, and bottom of the predetermined interval with respect to the reference point A. .

That is, when the brightness or saturation of the reference point A and its surrounding point B are the same (S307), the pneumoconiosis determination unit 37 does not have a combination of a plurality of basic primary colors, but a single color by a copying machine or a printing plate. It is determined that the made, and therefore, the banknote input to the banknote recognition device 30 is determined as genuine (S309). In this case, as described above, when the comparison unit 35 compares the reference point A with the plurality of peripheral points B, the pneumoconductor determination unit 37 takes into account the damage of the image due to long use, and the brightness or saturation values are the same. When the number of times is a certain number or more, the input bill can be set to judge as genuine.

When the brightness or the saturation of the reference point A and its peripheral point B are different, the pneumococcal determination unit 37 may determine that the banknote input to the banknote recognizing device 30 is forged or modulated. However, in this case, for a more clear authentication, when the number of cases where the brightness or saturation values differ from each other in comparison to the plurality of brightness or saturation values as described above is greater than or equal to a certain number, the comparison unit 35 is the peripheral point B from the reference point A. It may be implemented to compare the brightness or saturation of the second peripheral point C and the reference point A of the distance extended in the direction of (S311).

When the number of cases where the brightness or saturation values are the same or the brightness or saturation values are different within a certain number with respect to the secondary comparison by the comparison unit 35 (S313), the pneumococcal determination unit 37 receives the input bill. It is determined as genuine (S309).

When the number of cases where the brightness or saturation values differ from each other by the comparison unit 35 is greater than or equal to a certain number (S313), the nuisance judgment unit 37 determines that the input bill is forged or modulated.

Thus, the banknote recognition device 30 can accurately determine whether the banknotes are being deciphered by comparing the brightness or saturation value of the reference point with the brightness or saturation of the surrounding point with respect to the image enlarged by the enlarger 33. Will be.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the present invention is not limited to the specific embodiments of the present invention without departing from the spirit of the present invention as claimed in the claims. Anyone skilled in the art can make various modifications, as well as such modifications are within the scope of the claims.

According to the present invention, since the bill recognition device does not need to compare the obtained image with the data of the genuine image, it is not necessary to install a memory for storing the data of the genuine image, thereby reducing the manufacturing cost.

In addition, since the bill recognition apparatus according to the present invention does not need to compare the data of the original image and the data of the obtained image one by one, it is possible to reduce the time required for image authentication.

Further, the banknote recognizing apparatus according to the present invention authenticates the image based on the characteristics of the forged or modulated image, so that the authentication of the image is simple and accurate.

Claims (22)

An imaging unit for photographing an input bill; An enlargement unit for enlarging an image captured by the imaging unit; A pattern analyzer searching for at least one contrast area among brightness, saturation, and color with respect to the image enlarged by the enlarger, and analyzing a flow pattern of contrast boundary lines in the searched contrast area; And Banknote recognition device characterized in that it comprises a pneumatic determination unit for determining whether the input bill is genuine based on the flow pattern of the contrast boundary line analyzed by the pattern analysis unit. The method of claim 1, And the enlargement unit enlarges the photographed image at a rate that can identify at least 300 dots per inch with respect to an image printed by at least one of a printer, a copier, and a scanner. The method according to claim 1 or 2, Further comprising an image converter for converting the image enlarged by the enlargement unit into a single color, The pattern analyzer detects at least one contrast area of brightness and saturation of the monochrome image converted by the image converter, and analyzes a flow pattern of contrast boundary lines in the searched contrast area. . The method according to claim 1 or 2, The image capturing unit photographs the input bill in black and white, and the pattern analyzing unit searches at least one contrast region of brightness and saturation with respect to the black and white image captured by the image capturing unit, and detects a contrast boundary line of the searched contrast region. Banknote recognition device characterized in that for analyzing the flow pattern. The method according to claim 1 or 2, And a primary primary color removing unit for removing at least one primary primary color among the primary primary colors M (Magenta), C (Cyan), K (blacK), and Y (Yellow) for the image enlarged by the enlargement unit. , The pattern analyzer may search for at least one contrast region among brightness, saturation, and color of the image from which at least one primary primary color is removed by the basic primary color remover, and flow patterns of contrast boundary lines in the searched contrast regions. Banknote recognition device characterized in that for analyzing. The method according to claim 1 or 2, Further comprising a primary primary color removing unit for removing at least one of the primary primary colors distinguished by R (Red), G (Green), B (Blue) for the image enlarged by the enlargement unit, The pattern analyzer may search for at least one contrast region among brightness, saturation, and color of the image from which at least one primary primary color is removed by the basic primary color remover, and flow patterns of contrast boundary lines in the searched contrast regions. Banknote recognition device characterized in that for analyzing. The method according to claim 1 or 2, The pattern analyzer determines whether the flow pattern of the contrast boundary line fluctuates at least one dot interval, The banking judging unit, when it is determined that the flow pattern of the contrast boundary line analyzed by the pattern analysis unit fluctuates at least one dot interval, the banknote characterized in that the input bill is forged or modulated Recognition device. Photographing an input bill; Enlarging the image picked up by the imaging step; Searching for at least one contrast area among brightness, saturation and color of the image enlarged by the enlargement step; Analyzing a flow pattern of a contrast boundary line in the contrast area searched by the contrast area search step; And And determining whether the input bill is genuine or not based on the flow pattern of the contrast boundary line analyzed by the pattern analysis step. The method of claim 8, The enlargement step is a banknote recognition method characterized in that for enlarging the captured image at a rate that can identify more than 300 dots per inch with respect to the image printed by at least one of the printer, copier, scanner. The method according to claim 8 or 9, Converting the image enlarged by the enlargement step into a monochromatic image, The contrast area searching step is a banknote recognition method characterized in that for searching for at least one of the contrast region of the brightness, saturation for the monochrome image converted by the image conversion step. The method according to claim 8 or 9, The imaging step is to capture the input bill in a black and white image, And the contrast area searching step searches for at least one contrast area of brightness and saturation in the black and white image photographed by the imaging step. The method according to claim 8 or 9, The method may further include removing at least one primary primary color from among primary primary colors M (Magenta), C (Cyan), K (blacK), and Y (Yellow) for the enlarged image. The contrast area searching step may include searching for at least one contrast area among brightness, saturation, and color of the image from which at least one primary primary color is removed by the primary primary color removing step. The method according to claim 8 or 9, The method may further include removing at least one primary primary color among the primary primary colors distinguished by R (Red), G (Green), and B (Blue) from the enlarged image. The contrast area searching step may include searching for at least one contrast area among brightness, saturation, and color of the image from which at least one primary primary color is removed by the primary primary color removing step. The method according to claim 8 or 9, The pattern analysis step may determine whether the flow pattern of the contrast boundary line fluctuates at least one dot interval, In the authenticity determination step, when it is determined that the flow pattern of the contrast boundary line analyzed by the pattern analysis step is fluctuated at least one dot interval, it is determined that the input bill is forged or modulated. Banknote recognition method. An imaging unit for photographing an input bill; An enlargement unit for enlarging an image captured by the imaging unit; A comparison unit for comparing the brightness or saturation with respect to the image enlarged by the expansion unit with respect to the peripheral point spaced apart at intervals within a dot radius around an arbitrary reference point; And Banknote recognition device characterized in that it comprises a pneumatic judgment unit for determining whether the input bill is genuine or not according to whether the brightness or saturation compared by the comparison unit. The method of claim 15, The comparison unit, when the compared brightness or saturation of the reference point and the peripheral point is different from each other, the brightness of the secondary peripheral point and the reference point of the distance extending from the reference point at equal intervals in the direction of the peripheral point Or banknote recognition device for comparing saturation. The method of claim 16, And the pneumococcal judging unit judges that the input bill is forged or altered when the compared brightness or saturation of the reference point and the second peripheral point is different. The method according to claim 15 or 16, The comparing unit compares the surrounding points in the upper, lower, left, right, upper left, upper right, lower left, lower right at a predetermined interval with respect to the reference point. Photographing an input bill; Enlarging the image picked up by the imaging step; Comparing brightness or saturation with respect to an image enlarged by the enlargement step with a peripheral point separated by an interval within a dot radius about an arbitrary reference point; And And determining whether the input bill is genuine or not according to whether the brightness or the saturation are the same compared by the comparing step. The method of claim 19, In the comparing step, when the brightness or saturation of the reference point and the peripheral point are different from each other, the brightness or the saturation of the second peripheral point and the reference point of the distance extended at equal intervals from the reference point in the direction of the peripheral point are determined. Banknote recognition method characterized in that the comparison. The method of claim 20, The authenticity determining step is a banknote recognition method characterized in that it is determined that the input bill is forged or altered when the brightness or saturation of the reference point and the secondary peripheral point is different. The method of claim 19 or 20, The comparing step is a banknote recognition method characterized in that for comparing the peripheral points in the upper, lower, left, right, upper left, upper right, lower left, lower right with respect to the reference point.

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