Paper sheet identification device and paper sheet identification method
First Claim
1. A paper sheet identification device for identifying a stained condition of a paper sheet by detecting a stain on the paper sheet, the paper sheet identification device comprising:
- an area memory that stores therein in advance information about a target detection area where it is to be detected whether a stain is present on the paper sheet;
a pixel number memory that stores therein in advance a number of pixels of an image printed on the target detection area as a reference number of pixels;
a paper-sheet-type discrimination unit that discriminates a type of the paper sheet;
an image reading unit that reads, from the paper sheet, an image on the target detection area selected based on the type of the paper sheet discriminated by the paper-sheet-type discrimination unit;
a pixel-number detection unit that detects a number of pixels in the image read by the image reading unit as a number of read pixels;
a calculation unit that calculates a stain value, indicating a stained condition on the target detection area of the paper sheet, by comparing the number of read pixels detected by the pixel-number detection unit and the reference number of pixels stored in the pixel number memory, the reference number of pixels selected based on the type of the paper sheet discriminated by the paper-sheet-type discrimination unit.
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Accused Products
Abstract
A paper sheet identification device that detects a stain on a paper sheet and identifies the stained condition of the paper sheet includes an area memory (12) that stores therein in advance an area where a stain is to be detected on the paper sheet as a target detection area, a pixel number memory (11) that stores therein in advance the number of pixels of an image printed on the target detection area as the reference number of pixels used as a reference value when being compared, an image reading unit (13) that, based on the target detection area stored in the area memory, reads an image on the target detection area from the paper sheet, a pixel-number detection unit (14) that detects the number of pixels in the image read by the image reading unit as the number of read pixels, and a calculation unit (15) that calculates a stain value that indicates a stained condition on the target detection area of the paper sheet, by comparing the number of read pixels detected by the pixel-number detection unit with the reference number of pixels stored in the pixel number memory.
16 Citations
9 Claims
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1. A paper sheet identification device for identifying a stained condition of a paper sheet by detecting a stain on the paper sheet, the paper sheet identification device comprising:
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an area memory that stores therein in advance information about a target detection area where it is to be detected whether a stain is present on the paper sheet; a pixel number memory that stores therein in advance a number of pixels of an image printed on the target detection area as a reference number of pixels; a paper-sheet-type discrimination unit that discriminates a type of the paper sheet; an image reading unit that reads, from the paper sheet, an image on the target detection area selected based on the type of the paper sheet discriminated by the paper-sheet-type discrimination unit; a pixel-number detection unit that detects a number of pixels in the image read by the image reading unit as a number of read pixels; a calculation unit that calculates a stain value, indicating a stained condition on the target detection area of the paper sheet, by comparing the number of read pixels detected by the pixel-number detection unit and the reference number of pixels stored in the pixel number memory, the reference number of pixels selected based on the type of the paper sheet discriminated by the paper-sheet-type discrimination unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A paper sheet identification method for identifying a stained condition of a paper sheet by detecting a stain on the paper sheet, the paper sheet identification method comprising:
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setting in advance an area where it is to be detected whether a stain is present on the paper sheet as a target detection area and setting in advance a number of pixels of an image printed on the target detection area as a reference number of pixels; discriminating a type of the paper sheet; reading an image on the target detection area, the target detection area selected based on the type of the paper sheet discriminated from the paper sheet; detecting a number of pixels in the read image, as a number of read pixels; and calculating a stain value indicating a stained condition on the target detection area of the paper sheet, by comparing the number of read pixels detected and the reference number of pixels, the reference number of pixels selected based on the type of the paper sheet discriminated.
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Specification