WO2004081887A1 - 紙葉類識別方法及び紙葉類識別装置 - Google Patents
紙葉類識別方法及び紙葉類識別装置 Download PDFInfo
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- WO2004081887A1 WO2004081887A1 PCT/JP2003/003104 JP0303104W WO2004081887A1 WO 2004081887 A1 WO2004081887 A1 WO 2004081887A1 JP 0303104 W JP0303104 W JP 0303104W WO 2004081887 A1 WO2004081887 A1 WO 2004081887A1
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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
- G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
- G07D7/183—Detecting folds or doubles
Definitions
- the present invention relates to an identification method and an identification device for identifying paper sheets such as banknotes.
- the type and number of stored bills cannot be grasped unless a person takes out the reject box and counts the bills. .
- Patent Document 1 discloses that a rejected banknote is returned to a depositing unit so that a banknote rejected by a banknote discriminating unit can be reused, and the banknote is slowed down. It states that re-conveying and discriminating again reduces the rejection of banknotes.
- Patent Literature 2 also enables tracking of the denomination and the number of banknotes to be conveyed, so that the denomination and the number of banknotes can be determined even when multiple banknotes are fed. It is described that it can be specified.
- Patent Document 1 merely increases the discrimination accuracy by lowering the transport speed, and does not discriminate overlapping banknotes.
- Patent Document 2 is based on the thickness of a bill, and from which denomination box the bill is transported. It merely estimates the denomination and the number of banknotes based on the transmitted force.
- Patent Document 1
- Patent Document 2
- Patent No. 3320386 (FIG. 6, paragraphs 0035, 0036)
- the paper sheet identification method of the present invention reads a transparent image of a medium made of paper sheets, stores the read image in a storage unit, and extracts and extracts a contour line of the image stored in the storage unit. An area is extracted based on the extracted contour line, an overlapping portion or a non-overlapping portion of a transmission image or a reflection image of the extracted region is cut out, and the cut out image is compared with a reference image to identify the type of medium.
- the type of the overlapping medium can be identified by comparing the image of the non-overlapping portion cut out from the overlapping image or the image of the overlapping portion with the reference image.
- a transmission image of a medium is read, the read image is stored in a storage unit, an outline of the image stored in the storage unit is extracted, and the extracted outline is extracted.
- Area and calculates the pixel density of the extracted area, and determines whether or not the images of the multiple overlapping areas are images of the same medium based on whether the calculated density is equal to or higher than a predetermined value. Then, based on the size of the overlapping or non-overlapping part of the image, cut out the image of the overlapping or non-overlapping part of the transmission image or reflection image, compare the cut out image with the reference image, and Identify the species.
- the non-overlapping portion cut out from the overlapped image is By comparing the image or the image of the overlapping portion with the reference image, the type of the overlapping medium can be identified. By calculating the density of the image, it is possible to determine whether the image is from the same medium or from a different medium.
- the extracted outline is Hough-transformed to extract the same straight line, and a rectangular area surrounded by the extracted straight line is extracted.
- the same straight line can be easily extracted from a plurality of outlines extracted from the image of the medium, and the outline of the medium can be accurately extracted.
- the size of the non-overlapping portion of the medium is less than a predetermined value. If the size is less than the predetermined value, the image of the overlapping portion is cut out and the size of the non-overlapping portion is determined. If the value is equal to or greater than the predetermined value, cut out the image of the non-overlapping part.
- intersections of diagonal lines of a plurality of regions having overlapping portions are obtained, and a plurality of regions in which the coordinates of the intersections of the diagonal lines are within a predetermined range are grouped into one group. Cut out images for comparison from one image.
- the images may be grouped into one group.However, depending on the density of the transmitted image, the images are determined to be images of different media. can do.
- binarized binarization processing is performed on the clipped image, and the binarized image is compared with the binarized reference image. Identifies the type of banknote.
- FIG. 1 is a diagram illustrating the principle of a paper sheet identification device according to the present invention.
- the paper sheet identification apparatus of the present invention includes: an image reading unit 1 for reading a transmitted image of a medium made of paper sheets; a storage unit 2 for storing the read image; and a contour of the image stored in the storage unit 2.
- Means 5 and identification means 6 for comparing the cut-out image with a reference image to identify the type of medium.
- the type of the overlapping medium can be identified by comparing the image of the non-overlapping portion cut out from the overlapping image or the image of the overlapping portion with the reference image.
- Another paper sheet identification device of the present invention includes: an image reading means 1 for reading a transmitted image of a medium made of paper sheets; a storage means 2 for storing the read image; and an image stored in the storage means 2.
- Contour extracting means 3 for extracting a contour line of the area
- area extracting means 4 for extracting an area based on the extracted contour line
- density calculating means 7 for calculating the pixel density of the extracted area, and calculation.
- Determining means 8 for determining whether or not the images of the plurality of areas having overlapping portions are images of the same medium, based on whether or not the density of the pixels thus obtained is equal to or greater than a predetermined value; It is provided with a cutout means 5 for cutting out an overlapping portion or a non-overlapping portion of the image based on the size, and an identification means 6 for identifying the type of medium by comparing the cutout image with a reference image.
- the image of the non-overlapping portion cut out from the overlapping image or the image of the overlapping portion is compared with the reference image to thereby obtain the overlap.
- the type of the medium having the image can be identified. By calculating the density of the image, it is possible to determine whether the image is from the same medium or from a different medium.
- the reading unit reads a transmission image and a reflection image of the medium
- the cutout unit specifies an overlapping portion of the reflection image corresponding to an overlapping portion of the transmission image, and Cut out the image of the overlapping part or non-overlapping part.
- the overlapping part of the transmission image is specified, the overlapping part of the reflection image corresponding to the overlapping part of the transmission image is specified, and the appropriate part for matching is determined from the reflection image of the overlapping medium. You can cut out the perfect image.
- FIG. 1 is a diagram illustrating the principle of the present invention.
- FIG. 2 is a diagram showing a configuration of a transport system and a bill storage unit of the automatic teller machine of the embodiment.
- FIG. 3 is a diagram illustrating a configuration of the control unit.
- FIG. 4 is a flowchart of the bill identification process.
- FIG. 5 is a flowchart of the medium cutout processing.
- Figure 6 is a flowchart of the two-black binarization process.
- FIG. 7 is a diagram showing the image density and the threshold value.
- FIG. 8 is a flowchart of the matrix matching process.
- FIGS. 9A to 9C are diagrams showing the contours of the reflection image, the transmission image, and the extracted image.
- FIGS. 10A and 10B are diagrams showing rectangles created from the extracted contour lines.
- FIGS. 11 (A) and (B) show reflection images corresponding to the created rectangles.
- FIGS. 12 (A) and 12 (B) are diagrams showing an image from which the overlapping portion has been deleted.
- FIGS. 13 (A) and 13 (B) are diagrams showing the state where the extracted rectangle is rotated and moved to the origin
- FIGS. 13 (C) and (D) are diagrams showing the image which has been rectified. .
- FIG. 14 is a diagram showing a binarized image of a registered banknote. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 2 is a diagram showing a configuration of a transport system and a bill storage unit of the automatic teller machine (ATM) 11 according to the embodiment.
- the paper sheet identification device according to the present invention can be realized as a device incorporated in an ATM or the like, or as a bill validator. Paper sheets refer to paper-like media such as banknotes, checks, and certificates.
- Banknotes deposited from the depositing / dispensing section 12 are sent out to the internal transport path by the feeding roller 13, and the banknote discriminating section 14 identifies the presence or absence of a double feed, discriminates banknote types, and discriminates between true and false bills. Is performed. Banknotes determined to be rejected are stored in reject box 15.
- the banknote discriminating unit 14 determines that the banknote is in a normal state (no double feed or the like) and the banknote discriminated from the bill is stored in the temporary holding unit 16.
- the banknotes stored in the temporary storage section 16 pass through the banknote discrimination section 14 again after the customer confirms the amount of the deposit, and the statistic force 17 for storing 1,000 yen bills or 10,000 yen bills Is sent to the start force 18 that stores the When the customer performs a deposit cancel operation after the deposit, the banknotes stored in the temporary holding unit 16 are returned to the deposit / withdrawal unit 12.
- the bills stored in the bill cassettes 19 and 20 are dispensed from the depositing and dispensing unit 12 via the transport path.
- FIG. 3 is a diagram illustrating a configuration of a control unit that controls the transport of the banknotes, identifies the type of the rejected banknotes in the banknote discriminating unit 14, and discriminates the authenticity of the banknotes.
- the CPU 31 executes control of the transport system, identification of denominations of rejected bills, identification processing of bills, etc. in accordance with a program stored in the ROM 32, and extraction of contours and collation of images for image processing.
- the processing is performed by the processor 34, and the processing result data is stored in the RAM 33.
- the image processing processor 34 performs a contour extraction process, a region extraction process, and the like on the image data of the banknote read by the transmission type line sensor 35 and the reflection type line sensor 36 provided in the banknote discriminating unit 14, and outputs the processing result.
- the image data is stored in the RAM 38 via the multiplexer 37.
- the image data stored in the RAM 38 can be read from the CPU 31 via the multiplexer 37.
- FIG. 4 is a flowchart showing processing contents in the bill validating section 14. The following processing is executed by the CPU 31 and the image processing processor 34.
- the banknote image data is read by the transmission type line sensor 35 and the reflection type line sensor 36, and the read image data is stored in the RAM 38 (FIG. 4, S11).
- the media is cut out (Fig. 4, S12).
- contour extraction and rectangle extraction of an image are performed, and an overlapping medium is extracted.
- FIG. 5 is a flowchart of the medium cutout processing in step S12 in FIG.
- the density of each pixel of the transmitted image of the bill read by the transmission line sensor 35 is first differentiated (Fig. 5, S21).
- the differentiation result is compared with a predetermined threshold value, and is simply binarized to extract the banknote contour (Fig. 5, S22).
- the transmission image of the bill is read by the transmissive line sensor 35 with the background being white. You. Therefore, since the density difference becomes maximum at the boundary with the background, for example, at the outline portion of the bill, a line connecting the points at which the density gradient becomes maximum can be extracted as the outline line.
- the binarized contour is Huff-transformed, and a contour passing through the same point on the Hough plane is extracted as the same straight line (Fig. 5, S23).
- the Hough transform is to convert a straight line into a point represented by a distance p from the reference point and an angle ⁇ .
- An arbitrary straight line is represented by an angle 'on the horizontal axis and a Hough plane (p — It can be represented by a point (p, ⁇ ⁇ ) above the ⁇ plane.
- step S24 the rectangle extraction process of step S24 is executed.
- a straight line corresponding to the point obtained by the Hough transform and the length of the straight line are divided into two groups, vertical and horizontal, and are surrounded by each straight line divided into two groups, vertical and horizontal Create a rectangle on the X, y coordinates.
- the rectangles are grouped according to the coordinates of the intersections of the diagonal lines of the rectangles, and a plurality of rectangles whose coordinates of the intersections of the diagonal lines are within a predetermined range are combined into one rectangle representing the same group. Then, the average density of the pixels in the rectangular overlapping portion is calculated, and it is determined whether or not the average density is equal to or higher than a predetermined threshold. In this embodiment, it is determined that the white density is the highest in the gradation data of the image, and the density decreases as the color approaches black.
- the average density of pixels is less than a predetermined threshold, that is, when the density of pixels is close to black, it is determined that the image has been read with multiple media overlapping, and those images are read as images on different media.
- a predetermined threshold that is, when the density of pixels is close to black
- the average density of the pixels is equal to or higher than the threshold value, it is determined that an image of one medium has been read, and the images are processed as images of the same group.
- the number of pixels (the number of dots) of the non-overlapping portion is counted, and it is determined whether the number of pixels of the non-overlapping portion is less than a predetermined threshold (Fig. 5, S25).
- a predetermined threshold Fig. 5, S25.
- the process proceeds to step S26.
- a non-overlapping portion is cut out as a medium image.
- step S27 the process proceeds to step S27, and the overlapping portion is cut out as a medium image.
- the outline of the medium is extracted, a rectangle (area) is extracted from the outline, and an image of a non-overlapping portion or an overlapping portion of a bill to be identified is cut out. be able to.
- step S13 in FIG. 4 the labeling processing in step S13 in FIG. 4 is executed, and a number is assigned to the cutout medium.
- step S15 executes the two-black binarization process.
- This two-black binary shading (see W. Niback: An Introduction to Digital Image Processing) is performed on an image cut out from a reflection image of a banknote read by the reflection type line sensor 36.
- FIG. 6 is a flowchart of the two-black binarization processing
- FIG. 7 shows the distribution of the white threshold, the intermediate threshold, the black threshold, and the pixel density in the two-black binarization.
- Binary black binarization means that when binarizing pixels, as shown in Fig. 7, the white threshold (the threshold with the higher density) and the black threshold (the lower the density) One side
- an intermediate threshold value is set between the two, and the white and black pixels are determined based on the white threshold value and the black threshold value. Is used to determine white pixels and black pixels.
- the image data (banknote data) of the reflection image of the banknote corresponding to the region (the non-overlapping portion or the overlapping portion) cut out from the transmission image by the above-described medium cutout process is read from the RAM 38 ( (Fig. 6, S30).
- step S33 • Proceed to step S33 to fix the pixel to white.
- step S34 it is determined whether the density of the pixel is lower than the black threshold.
- step S35 If the density of the pixel is equal to or less than the black threshold value (S34, YES), the process proceeds to step S35, and the pixel is determined as black.
- step S34 it is determined that the pixel density is not below the black threshold.
- step S36 it is determined whether or not the pixel density is below the intermediate threshold.
- step S35 When the pixel density is equal to or lower than the intermediate threshold value (S36, YES), the process proceeds to step S35 described above, and the pixel is determined as black. If the pixel density exceeds the intermediate threshold value (S36, NO), the process proceeds to step S33, where the pixel is
- step S33 or S35 the determined pixel value is stored in the RAM 38 as binary data for comparison (FIG. 6, S37).
- the image read from the bill can be straightened.
- FIG. 8 is a detailed flowchart of the matrix matching process in step S16.
- the binary data of the reflection image to be subjected to pattern matching (binary data for matching) is read from the RAM 38 (Fig. 8, S41).
- the binary data (binary data for registration) of each denomination of the banknote which is the basis of the pattern matching, is read from a non-volatile memory such as ROM32 (Fig. 8, S
- the matching rate (dot matching rate) between the matching binary data read from the banknote and the reference binary data stored in ROM32 is calculated (Fig. 8, S43). ) 0
- Reading the binarized image and calculating the dot matching rate in steps S41 to S43 above are based on the front, back, and upside down images of all denominations stored in ROM 32 Identify the denominations with the highest matching rate.
- the ROM 32 stores two-black binarized data of front, back, and upside down images of each denomination of banknotes as shown in FIG.
- the process proceeds to step S17 of FIG. 4, and the difference between the matching ratio of the denomination having the highest dot collation ratio and the dot matching ratio of the denomination having the second highest collation ratio is a predetermined value. It is determined whether or not the threshold value is exceeded. If the difference between the dot matching rates is equal to or greater than the threshold value (S17, YES), the matching result of a specific denomination has a significant difference from the matching results of other denominations. The denomination of the banknote to be advanced is determined, and the result is output as the identification result.
- denominations of banknotes that overlap due to double feed, bending of the banknotes, or the like can be identified.
- the denomination and the number of the identified banknotes stored in the reject box can be determined even if a human does not collect the reject box of the ATM. It can be grasped at a remote control center or the like.
- FIGS. 9 (A) and 9 (B) are diagrams showing an example of a reflection image and a transmission image read by the reflection type line sensor 35 and the transmission type line sensor 36 of the banknote discriminating unit 14, respectively. It is a figure showing the outline obtained from a transmission picture.
- FIG. 9 (C) shows a straight line with no contour, there are cases where multiple contour lines are actually extracted from the same medium.
- Hough transform is performed on the extracted contour lines, and the obtained straight lines are combined to extract rectangles as shown in FIGS. 10 (A) and 10 (B). Furthermore, it is determined whether or not the size (number of dots) of the non-overlapping portion of the extracted rectangle is equal to or larger than a predetermined value. If the size is equal to or larger than the predetermined value, a non-overlapping portion is extracted. Is extracted. Next, the coordinates of the intersection of the extracted rectangular straight lines are calculated, and as shown in FIG. The area surrounded by the points of the corresponding coordinates of the projected image is specified, and the area of the overlapping part is also specified. Then, those image data are read from RAM 38.
- FIGS. 12 (A) and 12 (B) are diagrams showing an image (gradation data) in which the overlapping portion has been deleted from the reflection image. Next, rotate and move the image so that the point on the left corner of the image from which the overlap has been removed becomes the origin of the x and y coordinates, and move it to the position shown in Figs. 13 (A) and (B). Let it. Then, the moved image is binarized by a two-black binarization process.
- FIGS. 13 (C) and 13 (D) are diagrams showing binarized images in which the overlapping portions have been deleted.
- ROM32 When a binarized image from which the overlapping portion has been deleted is obtained, the binary data for registration stored in ROM32 is read.
- ROM32 has four types of black values: a front image, a back image, an image with the top and bottom reversed, and an image with the top and bottom reversed, as shown in Fig. 14. Data is stored.
- the image from which the overlap is removed is moved to the origin of the X and y coordinates, and the image is binarized into two blacks
- a denomination with a high degree of coincidence is selected.
- it is determined whether or not the difference between the degree of coincidence between the denomination having the highest degree of coincidence and the denomination having the second degree of coincidence is equal to or greater than a predetermined threshold value.
- the denomination is determined as the denomination of the read bill.
- the comparison may be performed by masking the registration binary data corresponding to the image data of the deleted portion, or may be used for registration corresponding to the cut-out portion. Only data may be read.
- the present invention is not limited to the configuration described above, and may be configured as follows.
- the overlapped portion is cut out from the transmission image, and the reflection image corresponding to the cutout portion is compared with the reference image.
- the output image may be compared with a reference image.
- the present invention is not limited to a bill validator, but can be applied to any device that needs to identify checks, certificates, and other paper media in an overlapping state.
- the kind of paper sheets with an overlap can be identified.
- the denomination and number of rejected banknotes can be specified. Even without doing so, the denomination and the number of banknotes resent at a remote control center or the like can be ascertained.
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004569362A JP4286790B2 (ja) | 2003-03-14 | 2003-03-14 | 紙葉類識別方法及び紙葉類識別装置 |
| PCT/JP2003/003104 WO2004081887A1 (ja) | 2003-03-14 | 2003-03-14 | 紙葉類識別方法及び紙葉類識別装置 |
| CN038228661A CN1685373B (zh) | 2003-03-14 | 2003-03-14 | 钞票的识别方法和识别装置 |
| US11/171,376 US20050244046A1 (en) | 2003-03-14 | 2005-07-01 | Sheet media identification method and sheet media identification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2003/003104 WO2004081887A1 (ja) | 2003-03-14 | 2003-03-14 | 紙葉類識別方法及び紙葉類識別装置 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/171,376 Continuation US20050244046A1 (en) | 2003-03-14 | 2005-07-01 | Sheet media identification method and sheet media identification apparatus |
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| WO2004081887A1 true WO2004081887A1 (ja) | 2004-09-23 |
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| PCT/JP2003/003104 Ceased WO2004081887A1 (ja) | 2003-03-14 | 2003-03-14 | 紙葉類識別方法及び紙葉類識別装置 |
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| Country | Link |
|---|---|
| US (1) | US20050244046A1 (ja) |
| JP (1) | JP4286790B2 (ja) |
| CN (1) | CN1685373B (ja) |
| WO (1) | WO2004081887A1 (ja) |
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| JP2002199179A (ja) * | 2000-12-27 | 2002-07-12 | Oki Electric Ind Co Ltd | 傾き検出装置 |
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| US5448692A (en) * | 1991-03-27 | 1995-09-05 | Ricoh Company, Ltd. | Digital image processing device involving processing of areas of image, based on respective contour line traces |
| US5751854A (en) * | 1992-08-03 | 1998-05-12 | Ricoh Company, Ltd. | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system |
| JP3974946B2 (ja) * | 1994-04-08 | 2007-09-12 | オリンパス株式会社 | 画像分類装置 |
| JP3748164B2 (ja) * | 1998-02-06 | 2006-02-22 | 富士通株式会社 | パターン抽出装置 |
| JP3904840B2 (ja) * | 2000-08-15 | 2007-04-11 | 富士通株式会社 | 多値画像から罫線を抽出する罫線抽出装置 |
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- 2003-03-14 WO PCT/JP2003/003104 patent/WO2004081887A1/ja not_active Ceased
- 2003-03-14 JP JP2004569362A patent/JP4286790B2/ja not_active Expired - Lifetime
- 2003-03-14 CN CN038228661A patent/CN1685373B/zh not_active Expired - Fee Related
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2005
- 2005-07-01 US US11/171,376 patent/US20050244046A1/en not_active Abandoned
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| JPH05182063A (ja) * | 1991-12-27 | 1993-07-23 | Laurel Bank Mach Co Ltd | 紙葉類計数機 |
| EP1011079A1 (en) * | 1998-12-14 | 2000-06-21 | Kabushiki Kaisha Toshiba | Apparatus for determining the soil degree of printed matter |
| JP2002199179A (ja) * | 2000-12-27 | 2002-07-12 | Oki Electric Ind Co Ltd | 傾き検出装置 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101397782B1 (ko) * | 2007-05-29 | 2014-05-20 | 주식회사 엘지씨엔에스 | 지폐이미지 추출 장치 및 방법 |
| JP2010055399A (ja) * | 2008-08-28 | 2010-03-11 | Musashi Eng Co Ltd | 束数検出装置及び束数検出方法 |
| CN104361672A (zh) * | 2014-10-14 | 2015-02-18 | 深圳怡化电脑股份有限公司 | 一种对纸币折角进行检测的方法 |
| CN105006062A (zh) * | 2015-07-29 | 2015-10-28 | 深圳怡化电脑股份有限公司 | 一种识别纸币的方法及存取款装置 |
| CN105006062B (zh) * | 2015-07-29 | 2018-06-29 | 深圳怡化电脑股份有限公司 | 一种识别纸币的方法及存取款装置 |
| JP2022026482A (ja) * | 2020-07-31 | 2022-02-10 | ローレルバンクマシン株式会社 | 紙葉類判別装置、紙葉類処理機および紙葉類判別方法 |
| JP7398708B2 (ja) | 2020-07-31 | 2023-12-15 | ローレルバンクマシン株式会社 | 紙葉類処理機および紙葉類処理方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1685373A (zh) | 2005-10-19 |
| JPWO2004081887A1 (ja) | 2006-06-15 |
| US20050244046A1 (en) | 2005-11-03 |
| CN1685373B (zh) | 2011-03-02 |
| JP4286790B2 (ja) | 2009-07-01 |
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