WO2004077366A1 - 紙葉類識別装置および方法 - Google Patents
紙葉類識別装置および方法 Download PDFInfo
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- WO2004077366A1 WO2004077366A1 PCT/JP2004/002434 JP2004002434W WO2004077366A1 WO 2004077366 A1 WO2004077366 A1 WO 2004077366A1 JP 2004002434 W JP2004002434 W JP 2004002434W WO 2004077366 A1 WO2004077366 A1 WO 2004077366A1
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- WIPO (PCT)
- Prior art keywords
- watermark
- area
- image
- paper sheet
- region
- Prior art date
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Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
- G07D7/0034—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements using watermarks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D2207/00—Paper-money testing devices
Definitions
- the present invention relates to a paper sheet identification apparatus and method, and more particularly, to a paper sheet identification apparatus and method that extracts a characteristic of a paper sheet from an image and determines the type and authenticity of the paper sheet.
- paper sheets such as banknotes, checks, gift certificates, etc. are identified magnetically or optically by using a magnetic sensor or optical sensor to extract the characteristics of the paper sheets entered by the user. It is done by doing.
- the extraction of optical characteristics of paper sheets by optical sensors is performed by extracting the design, dimensions, direction, etc. of paper sheets using a transmission type optical sensor or reflection type optical sensor, and acquiring those image patterns. By comparing the obtained image pattern with the standard pattern of genuine bills for each type, the type and authenticity of the inserted sheets are identified.
- the type and authenticity of paper sheets are determined by the transmission type optical sensor by arranging the light emitting element and the light receiving element at a predetermined distance, and transporting the paper sheet between the light emitting element and the light receiving element. Then, the specific pattern is detected, and the detected specific pattern is compared with the standard specific pattern of the genuine bill stored and held in advance to identify the type and authenticity of the input paper sheets.
- a specific example of the specific pattern is a watermark pattern.
- a conventional method of detecting a watermark pattern for example, as disclosed in Japanese Patent Application Laid-Open No. 2002-33912, The image of the watermark area where the watermark pattern is present is binarized, and the binarized image data is subjected to projection processing in an arbitrary direction to determine the presence or absence of the watermark pattern. It is a figure explaining the outline of the detection method of a pattern.
- FIG. 7 (a) is a diagram illustrating an outline of a method of detecting the watermark pattern 23 when no wrinkles or stains (261, 262, 263) are present on the sheet. .
- the watermark area 21 has white pixels.
- FIG. 7B is a diagram schematically illustrating a method of detecting the watermark pattern 23 when wrinkles, stains, or the like (261, 262, 263) are present on the paper sheet.
- the watermark area 21 has white pixels
- the watermark pattern 23 has a wrinkle, a stain, etc.
- a graph 27 2 shown in FIG. 7 (b) is generated.
- the graph 272 is greatly affected by wrinkles, stains, etc. (261, 262, 263), and the presence or absence of the watermark pattern 23 may be erroneously determined.
- the conventional watermark pattern detection method is easily affected by the state of the sheet such as wrinkles and stains, and it is difficult to accurately determine the type or authenticity of the sheet. Disclosure of the invention
- an object of the present invention is to provide a paper sheet identification apparatus and method capable of accurately determining the type or authenticity of a paper sheet without being affected by the state of the paper sheet. .
- the invention according to claim 1 is a transmission type optical sensor that irradiates a sheet with transmitted light and acquires an image of the sheet based on the transmitted light, and the transmission type light sensor.
- a watermark region extracting unit that extracts an image of a watermark region where a watermark pattern is present from an image obtained by the sensor; an image processing unit that divides the watermark region image extracted by the watermark region extracting unit into a plurality of regions; Of a plurality of areas divided by the image processing means And identifying means for identifying the macrophytes based on the feature amount of an image included in a specific region therein.
- the invention of claim 2 is the invention of claim 1, wherein the specific area is an area in which the characteristic image of the watermark pattern exists.
- the invention according to claim 3 is the invention according to claim 1, wherein the identification unit includes a feature amount extraction unit that extracts an area or a center of gravity of the watermark pattern existing in the image of the specific region as the feature amount. It is characterized by having.
- the image processing means includes: a watermark area gravity center calculating means for calculating the center of gravity of the watermark area; and a center based on the gravity center calculated by the watermark area gravity center calculating means. And a watermark area dividing means for dividing the image of the watermark area into a plurality of areas.
- the watermark area extracting means binarizes the image of the paper sheet based on a watermark area extraction threshold, and outputs the binarized image of the paper sheet.
- the watermark area is extracted based on an image.
- the watermark area extraction threshold is set to a value between the amount of light transmitted through the watermark area and the amount of light transmitted through an area other than the watermark area. It is characterized by the following.
- the invention according to claim 7 is characterized in that the paper sheet is irradiated with transmitted light, an image of the paper sheet is acquired based on the transmitted light, and a watermark pattern of the paper sheet is present from the acquired image.
- the image of the watermark region is extracted, the image of the extracted watermark region is divided into a plurality of regions, and the sheet is based on the feature amount of an image included in a specific region among the plurality of divided regions. Classification is identified.
- the invention of claim 8 is the invention of claim 7, wherein the specific area is an area in which the characteristic image of the watermark pattern exists.
- the invention of claim 9 is characterized in that, in the invention of claim 7, an area or a center of gravity of the watermark pattern existing in the image of the specific area is extracted as the feature amount.
- the invention according to claim 10 is the invention according to claim 7, wherein a plurality of the watermark regions are provided.
- the center of gravity of the watermark region is calculated, and the image of the watermark region is divided into a plurality of regions based on the calculated center of gravity.
- the image of the paper sheet is binarized based on a watermark region extraction threshold value, and the binarized paper is extracted.
- the watermark area is extracted based on a leaf image.
- the invention of claim 12 is the invention according to claim 11, wherein the watermark area extraction threshold value is a value between the amount of light transmitted through the watermark area and the amount of light transmitted through an area other than the watermark area. It is characterized by being set.
- FIG. 1 is a block diagram showing an example of a functional configuration of a paper sheet identification device 1 according to the present invention.
- FIG. 2 is a block diagram illustrating an example of a functional configuration of the identification unit.
- Figure 3 shows the paper sheet identification device used to identify the type and authenticity of the inserted paper sheets.
- FIG. 3 is a flowchart illustrating a processing procedure performed by the first embodiment.
- FIG. 4 is a diagram for explaining the processing of the image data 20 of the image area of the paper sheet performed by the identification unit.
- FIG. 5 is a diagram for explaining the processing of the image data 20 of the image area of the paper sheet performed by the identification unit.
- FIG. 6 illustrates the processing of the image data 20 of the image pickup area of the paper sheet performed by the identification unit 7 when the paper sheet has wrinkles or stains (2 61, 26 2, 26 3).
- FIG. FIG. 1 is a diagram schematically illustrating a conventional watermark pattern detection method. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a block diagram showing an example of a functional configuration of a paper sheet identification device 1 according to the present invention.
- the paper sheet identification device 1 controls the entire paper sheet identification device 1, a control unit 2, a paper sheet input unit 3 which is an entrance of the paper sheet, and transports the paper sheet.
- Paper transport unit 4 paper receiving unit 5 for receiving paper, drive unit 6 for driving paper transport unit 4 under the control of control unit 2, type and authenticity of paper It comprises an identification unit 7 for identification.
- the control unit 2 controls the driving unit 6 to convey the sheet by the sheet conveyance unit 4.
- the identification unit 7 identifies the type and authenticity of the paper sheet being transported by the paper sheet transport unit 4, and when the identification unit 7 identifies the paper as a genuine bill, the control unit 2 controls the drive unit 6 to control the paper.
- the control section 2 controls the drive section 6 to control the sheet.
- the paper transport unit 4 is driven to transport the paper sheets to the paper sheet insertion unit 3, and the paper sheets are returned.
- FIG. 2 is a block diagram showing an example of a functional configuration of the identification unit.
- the identification unit 7 includes a transmission optical sensor 8, a memory 11, a captured image binarization unit 12, a watermark region extraction unit 13, a watermark region binarization unit 14, and a watermark region centroid. It comprises a calculation unit 15, a watermark area division unit 16, a feature amount extraction unit 17, a standard feature amount storage unit 18, and a true / false judgment unit 19.
- the transmission type optical sensor 8 includes a pair of light-emitting elements 9 and light-receiving elements 10 arranged so as to sandwich the paper sheet transport section 4, and captures an image including a watermark area of the paper sheet to be identified.
- the light emitting element 9 is arranged on a predetermined scanning line passing through the area, irradiates light to an image pickup area of the sheet conveyed by the sheet conveying section 4, and the light receiving element 10 picks up the image of the sheet.
- the transmitted light transmitted through the area is received, and an electric signal is output according to the amount of the received transmitted light.
- any of infrared, ultraviolet, and visible light can be applied to the transmission optical sensor 8.
- the memory 11 converts the signal level of the electric signal output from the transmission optical sensor 8 at a predetermined time interval into a digital signal, and obtains a digital signal corresponding to the obtained signal level.
- the sequential signals are sequentially stored in a predetermined storage area, a continuous address is allocated, and the image is temporarily stored and held as an image of the image area of the paper sheet.
- the captured image binarization unit 12 reads out the image data of the image pickup area of the paper sheet stored and held in the memory 11 and reads the image data read out based on the watermark area extraction threshold. Perform binarization.
- the watermark region extraction threshold value is set so that the pixel value of the watermark region is set to “0” and the pixel value of the normal region other than the watermark region is set to “1” in order to extract the watermark region included in the imaging region. Set an appropriate value.
- the watermark area extraction unit 13 extracts a watermark area included in the imaging area based on the image data binarized by the captured image binarization unit 12.
- the watermark area binarization unit 14 performs a binary conversion of the image data in the watermark area extracted by the watermark area extraction unit 13 based on the watermark pattern extraction threshold.
- the watermark pattern extraction threshold is set to a value that sets the pixel value of the watermark area to “0” and the pixel value of the watermark pattern to “1” in order to extract the watermark pattern included in the watermark area. .
- the watermark area centroid calculation unit 15 calculates the centroid of the watermark area.
- the watermark area dividing unit 16 divides the watermark area into a plurality of areas based on the center of gravity of the watermark area calculated by the watermark area centroid calculating unit 15.
- the feature amount extraction unit 17 extracts a predetermined specific region from the regions divided by the watermark region division unit 16, and extracts a watermark pattern existing in the extracted specific region or the center of gravity of a part of the watermark pattern. A feature quantity such as an area is extracted.
- the standard feature storage unit 18 stores in advance a watermark pattern existing in a specific area of a genuine bill of a paper sheet or a part thereof as a standard data for each paper sheet type. ing.
- the authenticity determining unit 19 compares the feature amount extracted by the feature amount extracting unit 17 with the standard data stored in the standard feature amount storing unit 18 to obtain a paper sheet. Judge the type and authenticity.
- the paper inserted from the paper input unit 3 is transported by the paper transport unit 4.
- the light emitting element 9 captures an image of the paper.
- the area is irradiated with light
- the light receiving element 10 receives the transmitted light transmitted through the imaging area of the paper sheet, and outputs an electric signal to the memory 11 according to the amount of the received transmitted light.
- the signal level of the input electric signal is temporarily stored and held as an image of the image area of the paper sheet, and the picked-up image binarization unit 12 is stored and held in the memory 11.
- the image data stored is read out, the read image data is binarized based on the watermark region extraction threshold, and the binarized image data is sent to the watermark region extraction unit 13 to extract the watermark region.
- the unit 13 receives the binarized image data, the unit 13 transmits the image data based on the received image data.
- the watermark region is extracted, and the extracted information on the watermark region is transmitted to the watermark region binarization unit 14 .
- the watermark region binarization unit 14 receives the information on the watermark region, it is stored in the memory 11. Image data of the watermark area extracted from the read image data, and only the watermark area image data extracted based on the watermark pattern extraction threshold value.
- the image data of the binarized watermark region is sent to the watermark region centroid calculation unit 15, and the watermark region centroid calculation unit 15 receives the binarized watermark region image data.
- the center of gravity of the watermark area is calculated, and the calculated center of gravity of the watermark area and the image data of the watermark area are sent to the watermark area dividing unit 16.
- the image data of the received watermark area is divided into a plurality of areas with the center of gravity of the area as a base point, and the image data of the watermark area divided into the plurality of areas is sent to the feature amount extraction unit 17 to extract the feature amount.
- the unit 1 ⁇ When receiving the image data of the watermark area divided into a plurality of areas, the unit 1 ⁇ extracts the image data of the predetermined specific area from the received image data of the watermark area divided into the plurality of areas. Then, the watermark pattern existing in the image data of the extracted specific region and the feature amount such as the center of gravity and area of a part of the watermark pattern are extracted, and the extracted feature amount is sent to the authenticity judgment unit 19 to be authenticated. Upon receiving the feature value, the determination unit 19 compares the received feature value with the standard data stored in the standard feature value storage unit 18 to determine the type and authenticity of the paper sheet. Next, a processing procedure performed by the paper sheet identification device 1 when identifying the type and authenticity of the inserted paper sheet will be described with reference to a front end chart shown in FIG.
- the sheet identification apparatus captures an image of the sheet using a transmission-type optical sensor (step S302), and outputs the sheet.
- the captured image is binarized based on the watermark region extraction threshold value in advance (step S303), the watermark region is extracted from the binarized image (step S304), and the watermark region image is extracted from the captured image of the paper sheet. Only the data is extracted, and the image of the extracted watermark area is binarized based on the watermark pattern extraction threshold (step S305), the center of gravity of the watermarked area is calculated (step S306), and the calculated watermark is calculated.
- the watermark region image is divided into a plurality of regions with the center of gravity of the region as a base point (step S307), feature values in a predetermined specific region are extracted (step S308), and paper is extracted based on the extracted feature amounts.
- step S307 If it is determined that the ticket is genuine (YES in step S310), the sheet is accepted by the sheet receiving section (step S311), and the processing procedure ends.
- step S310 If it is determined in step S310 that the ticket is counterfeit (NO in step S310), the paper sheet is returned from the paper sheet insertion unit (step S312), and the processing procedure ends.
- FIG. 4 is a diagram for explaining the processing of the image data 20 of the image area of the paper sheet performed by the identification unit 7.
- FIG. 4A is a diagram illustrating an example of image data 20 of an image capturing area of a paper sheet captured by the transmission optical sensor 8.
- a watermark area 21 and a normal area 22 other than the watermark area exist in the image area of the paper sheet, and a plurality of watermark patterns 23 exist in the watermark area 21.
- the amount of light transmitted through the watermark area 21 is large
- the amount of light transmitted through the watermark pattern 23 is smaller than the amount of light in the watermark area 21
- the amount of light transmitted through the normal area 22 is smaller than the amount of light of the watermark pattern 23.
- the watermark area 21 and the watermark pattern 23 are converted to white pixels (images).
- the normal area “0”) and the normal area 22 are a black pixel (pixel value “1”)
- a watermark area is extracted from the value between the light quantity of the watermark pattern 23 and the light quantity of the normal area 22 It is set as a threshold
- the image data 20 shown in FIG. 4B is a diagram showing an example of the image data 20 obtained by binarizing the image data 20 shown in FIG. 4A based on the watermark region extraction threshold. As shown in Fig.
- the watermark region 21 and the watermark pattern 22 become white pixels, and the normal region 22 becomes black pixels.
- the watermark area 21 can be extracted based on the binarized image data 20.
- FIG. 4 (c) is a diagram showing an example of the image data 20 obtained by extracting the watermark area 21 of the image data 20 shown in FIG. 4 (a).
- the watermark area 21 is set to white pixels and the watermark pattern 23 is set to black pixels.
- a value between the light amount and the light amount of the watermark pattern 23 is set as a watermark pattern extraction threshold value, and the image data 20 shown in FIG. 4C is binarized based on the threshold value.
- FIG. 4D is a diagram illustrating an example of the image data 20 obtained by binarizing the image data 20 illustrated in FIG. 4C based on the watermark extraction threshold.
- the watermark area 21 becomes white pixels
- the watermark pattern 23 becomes black pixels.
- the watermark pattern 23 can be extracted based on the converted image data 20.
- FIG. 5 is a diagram for explaining the processing of the image data 20 of the image area of the paper sheet performed by the identification unit 7.
- the center of gravity 24 of the watermark area 21 is calculated, and the image data 20 from which the watermark area 21 is extracted is divided into a plurality of areas with the calculated center of gravity 24 as a base point.
- FIG. 5B is a diagram showing an example of the image data 20 obtained by dividing the image data 20 obtained by extracting the watermark area 21 from the center of gravity 24 into a plurality of areas.
- the image data 20 is divided into a plurality of regions of arbitrary shapes, and the region where the watermark pattern 23 is present is extracted as a characteristic region 25, and the extracted characteristic region 25
- the feature amount of the watermark pattern 23 is extracted.
- what is extracted as the feature amount is the area, the center of gravity, and the like of the watermark pattern 23 in the feature region 25 (including those which are not limited to the area and the center of gravity but are arithmetically determined).
- the shape of the region to be divided does not need to be limited to a rectangle as shown in FIG. 5 (b), and any shape can be applied.
- the type and authenticity of the paper sheet are determined by comparing the extracted characteristic amount with the standard characteristic amount extracted from the genuine paper sheet stored in advance.
- FIG. 6 is a diagram for explaining the processing of the image data 20 of the image area of the paper sheet performed by the identification unit 7 when the paper sheet has wrinkles or stains (261, 262, 263).
- FIG. 6A is a diagram illustrating an example of the image data 20 of a sheet having wrinkles, stains, and the like (261, 262, 263). As shown in FIG. 6 (a), in the watermark area 21, there are a plurality of watermark patterns 23 and wrinkles and stains (261, 262, 263).
- the amount of light transmitted through the watermark area 21 is large, the amount of light transmitted through the watermark pattern 23 is smaller than the amount of light in the watermark area 21, and the amount of light transmitted through wrinkles and stains (261, 262, 263) is empirically determined by the watermark. It is almost the same as the light quantity of pattern 23. Then, the image data 20 shown in FIG. 6A is binarized based on the watermark extraction threshold.
- FIG. 6B is a diagram showing an example of the image data 20 obtained by binarizing the image data 20 shown in FIG. 6A based on the watermark extraction threshold.
- the watermark area 21 is a white pixel
- the watermark pattern 23 and wrinkles (dirt, etc.) (261, 262, 263) are black pixels.
- the image data 20 is divided into a plurality of regions based on the center of gravity of the watermark region 21.
- FIG. 6 (c) is a diagram showing an example of image data 20 when the watermark pattern 23 is separated by dividing the image data 20 shown in FIG. 6 (b) into a plurality of regions based on the center of gravity. It is. As shown in FIG. 6 (c), the image data 20 is divided into a plurality of regions of arbitrary shapes, and the region where the watermark pattern 23 exists is defined as a feature region (251, 252, 2). 5 3), the area where two wrinkles, dirt, etc. (2 61, 2 62) exist is not taken out as the characteristic area (2 51, 25 2, 25 3).
- the two wrinkles, such as dirt are not affected by (261, 262), and the wrinkles, such as dirt, are present in the characteristic region 2553, but are wrinkles in the characteristic region 253. Wrinkles due to little occupation of dirt, etc. The effect of dirt etc. is small.
- the type and authenticity of the paper sheet are not determined only by the paper sheet identification method according to the present invention, but are comprehensively determined in combination with various identification factors. Alternatively, the determination may be made.
- ADVANTAGE OF THE INVENTION when discriminating a paper sheet based on the image data which captured the watermark pattern of the paper sheet, the influence which wrinkles, dirt, etc. of a paper sheet exert on the image data is minimized. By doing so, it is possible to stably identify the type and authenticity of paper sheets, and also to improve the accuracy of identifying paper sheets that have been finely forged.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US10/547,035 US20060177093A1 (en) | 2003-02-28 | 2004-02-27 | Sheet identifying device and method |
CA002517763A CA2517763A1 (en) | 2003-02-28 | 2004-02-27 | Sheet identifying device and method |
DE112004000347T DE112004000347T5 (de) | 2003-02-28 | 2004-02-27 | Vorrichtung und Verfahren zur Blattidentifikation |
GB0519389A GB2417773A (en) | 2003-02-28 | 2004-02-27 | Sheet identifying device and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-053504 | 2003-02-28 | ||
JP2003053504A JP2004265036A (ja) | 2003-02-28 | 2003-02-28 | 紙葉類識別装置および方法 |
Publications (1)
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WO2004077366A1 true WO2004077366A1 (ja) | 2004-09-10 |
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PCT/JP2004/002434 WO2004077366A1 (ja) | 2003-02-28 | 2004-02-27 | 紙葉類識別装置および方法 |
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US (1) | US20060177093A1 (ja) |
JP (1) | JP2004265036A (ja) |
KR (1) | KR20050107764A (ja) |
CN (1) | CN1757047A (ja) |
CA (1) | CA2517763A1 (ja) |
DE (1) | DE112004000347T5 (ja) |
GB (1) | GB2417773A (ja) |
WO (1) | WO2004077366A1 (ja) |
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JP4828880B2 (ja) * | 2005-07-14 | 2011-11-30 | 株式会社東芝 | 紙葉類の真偽判別装置 |
JP4828882B2 (ja) * | 2005-07-15 | 2011-11-30 | 株式会社東芝 | 紙葉類の真偽判別装置 |
JP5174513B2 (ja) * | 2008-04-03 | 2013-04-03 | グローリー株式会社 | 紙葉類の汚れ検出装置及び汚れ検出方法 |
DE102009058850A1 (de) * | 2009-12-18 | 2011-06-22 | Mühlbauer AG, 93426 | Verfahren zur Kontrolle von Wasserzeichen |
CN102592351B (zh) * | 2012-02-28 | 2013-11-27 | 广州广电运通金融电子股份有限公司 | 纸页类介质的鉴别方法 |
CN102789658B (zh) * | 2012-03-02 | 2015-02-18 | 成都三泰电子实业股份有限公司 | 紫外防伪支票真伪验证方法 |
CN102682514B (zh) * | 2012-05-17 | 2014-07-02 | 广州广电运通金融电子股份有限公司 | 一种纸类识别方法及相关装置 |
KR102156466B1 (ko) * | 2013-12-05 | 2020-09-16 | 센젠 푸 잉 이노베이션 테크놀로지 코포레이션 리미티드 | 그래픽 패턴 디코딩 장치 및 방법 |
CN103617673B (zh) * | 2013-12-10 | 2016-01-20 | 江苏国光信息产业股份有限公司 | 一种基于紫外图像特征的支票真伪鉴别方法 |
CN104574642B (zh) * | 2015-01-30 | 2017-04-26 | 广州广电运通金融电子股份有限公司 | 一种基于Lab色彩空间的人民币变色油墨检测方法和装置 |
KR101574302B1 (ko) * | 2015-04-09 | 2015-12-04 | 주식회사 디지워크 | 데이터가 삽입된 이미지 생성 방법 및 이를 실행하는 이미지 생성 장치 |
CN106650874B (zh) * | 2016-12-30 | 2019-07-26 | 河南工业大学 | 一种纸张纤维特征的显示、防伪方法及装置 |
CN108806058A (zh) * | 2017-05-05 | 2018-11-13 | 深圳怡化电脑股份有限公司 | 一种纸币检测方法及装置 |
CN107895424B (zh) * | 2017-10-31 | 2020-11-17 | 深圳怡化电脑股份有限公司 | 一种纸币的识别方法、***及金融终端 |
CN111652318B (zh) * | 2020-06-05 | 2023-09-01 | 中国银行股份有限公司 | 一种币种识别方法、识别装置、以及电子设备 |
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US7763715B2 (en) * | 2005-04-22 | 2010-07-27 | The Procter & Gamble Company | Extracting biopolymers from a biomass using ionic liquids |
-
2003
- 2003-02-28 JP JP2003053504A patent/JP2004265036A/ja not_active Withdrawn
-
2004
- 2004-02-27 WO PCT/JP2004/002434 patent/WO2004077366A1/ja active Search and Examination
- 2004-02-27 US US10/547,035 patent/US20060177093A1/en not_active Abandoned
- 2004-02-27 DE DE112004000347T patent/DE112004000347T5/de not_active Ceased
- 2004-02-27 CA CA002517763A patent/CA2517763A1/en not_active Abandoned
- 2004-02-27 KR KR1020057015670A patent/KR20050107764A/ko not_active Application Discontinuation
- 2004-02-27 GB GB0519389A patent/GB2417773A/en not_active Withdrawn
- 2004-02-27 CN CNA2004800055140A patent/CN1757047A/zh active Pending
Patent Citations (4)
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JPH0573753A (ja) * | 1991-01-18 | 1993-03-26 | Oki Electric Ind Co Ltd | 紙葉類認識処理方法 |
JPH08110949A (ja) * | 1993-05-07 | 1996-04-30 | Sharp Corp | 指紋画像の画質判定方法 |
JPH07272041A (ja) * | 1994-03-31 | 1995-10-20 | Toshiba Corp | 紙葉類検知判別方法及びその装置 |
JP2002092683A (ja) * | 2000-07-14 | 2002-03-29 | Oki Electric Ind Co Ltd | 媒体真偽鑑別装置 |
Also Published As
Publication number | Publication date |
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GB2417773A (en) | 2006-03-08 |
GB0519389D0 (en) | 2005-11-02 |
KR20050107764A (ko) | 2005-11-15 |
JP2004265036A (ja) | 2004-09-24 |
DE112004000347T5 (de) | 2006-02-23 |
CN1757047A (zh) | 2006-04-05 |
US20060177093A1 (en) | 2006-08-10 |
CA2517763A1 (en) | 2004-09-10 |
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