Method of discriminating paper notes
AssigneeGlory Kogyo Kabushiki Kaisha
InventorsHironori Shimada, Toshimitsu Kozuki
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Abstract
The present invention provides a discrimination method which reduces memory size and validate bills at a high speed. According to the present invention, reflected light or transmitted light from a paper note is received by an image sensor, image data is stored in a memory device, a region of the paper note is cut out from the image data in the memory device, the cut-out paper note image data is blocked and normalized, and a bit corresponding to the blocked value is turned on, the block paper note image data is encoded into pattern data, and the compression-coded pattern data is compared with prestored reference paper note pattern data to discriminate the paper note.
Claims9
A method of discriminating a paper note, said method comprising:
- receiving reflected light or transmitted light from the paper note by an image sensor to thereby obtain image data, and storing the image data in a memory device;
- cutting out a region of the paper note from the image data of the memory device;
- pre-processing the cut-out paper note image data to divide it into blocks;
- compression-encoding the pre-processed data of each of the blocks to form pattern data;
- and
- comparing the compression-coded pattern data with prestored paper note pattern data as reference pattern data to discriminate the paper note;
- wherein the blocking process is performed by extracting edges of the paper note and calculating vectors with an affine transformation.
A method of discriminating a paper note, said method comprising:
- receiving reflected light or transmitted light from the paper note by an image sensor to thereby obtain analog image data;
- converting the analog image data into digital image data comprising at least 256 bits of gradation;
- storing the digital image data into a memory device with a FIFO double buffer;
- cutting out a region of the paper note from the digital image data read from one of the FIFO double buffers of the memory device;
- dividing the digital data of the cut-out paper note into blocks;
- normalizing values of the blocks;
- compression-encoding the normalized values of the blocks to coded data having 4 digits comprising 0 or 1's in positions depending on an amplitude of the normalized values;
- repeating said compression-encoding for all of the normalized values of the blocks;
- obtaining compression-coded pattern data as a cluster value having a 32 bit word by combining the 4 digit coded data for 8 of the blocks;
- and
- comparing the compression-coded pattern data with prestored paper note pattern data of a selected area as reference pattern data to discriminate the paper note.
Dependencies are inferred from the claim text.