Paper sheet processing apparatus and paper sheet processing method
AssigneesKabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
InventorsShota Kure, Takahisa Nakano, Seiji Ikari
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Abstract
According to one embodiment, a paper sheet processing apparatus includes a conveyance mechanism which conveys a paper sheet with fluorescent ink print information along a conveyance path, a fluorescence reference member including a fluorescent material and arranged to oppose to the conveyance path, a light source device which irradiates the fluorescence reference member with excitation light, and an imaging device which images the fluorescence emission of the fluorescence reference member and acquires an image including a contour of the paper sheet passing over the fluorescence reference member and an image of the fluorescent ink print information of the paper sheet.
Claims8
A paper sheet processing apparatus comprising:
- a conveyance mechanism which conveys a paper sheet with fluorescent ink print information along a conveyance path;
- a fluorescence reference member which includes a fluorescent material which exhibits fluorescence emission at an excitation light wavelength common to the fluorescent ink print information, and is arranged to oppose to the conveyance path including a passing area of the paper sheet;
- a light source device which is arranged on an upstream side of the fluorescence reference member in a conveying direction of the paper sheet and irradiates the fluorescence reference member with excitation light;
- and
- an imaging device which images the fluorescence emission of the fluorescence reference member and acquires an image including a contour of the paper sheet passing over the fluorescence reference member and an image of the fluorescent ink print information of the paper sheet,
- wherein the fluorescence reference member is configured to include a fluorescent material in which a fluorescence emission intensity is excited to about 30 to 50% of a stable state within a time for the imaging device to scan one line.
A paper sheet processing method of processing a paper sheet with fluorescent ink it information, comprising:
- conveying, under a state where a fluorescence reference member, including a fluorescent material which exhibits fluorescence emission at an excitation light wavelength common to the fluorescent ink print information, is irradiated with excitation light to emit fluorescence, the paper sheet through a range of the fluorescence emission;
- acquiring an image of the paper sheet and an image of the fluorescence reference member by imaging the range of the fluorescence emission through the paper sheet by an imaging device including light receiving sensors while the paper sheet passes through the range of the fluorescence emission, wherein the fluorescence reference member is configured to include a fluorescent material in which a fluorescence emission intensity is excited to about 30 to 50% of a stable state within a time for the device to scan one line;
- detecting a contour of the paper sheet from the image of the paper sheet;
- and
- calculating a position shift and an inclination of the image of the paper sheet by comparing the detected contour and a reference position.
Dependencies are inferred from the claim text.