Patent ID: 11935351
Assignee: TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS, CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. 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.