Card identifying apparatus
View Patent ↗A card identifying apparatus according to one embodiment of the invention has a light-receiving portion that reads a card on a pixel basis of a predetermined area as a unit including color information having brightness, RAM that stores image data comprised of a plurality of pixels read by the light-receiving portion, a pixel data increasing/decreasing processing section that increases/decreases the number of pixels of the image data, and card identifying means for identifying authentication of the card based on the image data increased/decreased by the pixel data increasing/decreasing processing section.
1. A card identifying apparatus, comprising:
a reading section that reads a card on a pixel basis of a predetermined area as a unit including color information having a brightness;
a storage section that stores image data including a plurality of pixels read by the reading section;
an increasing/decreasing section that acquires moire data specific to increasing or decreasing ratios, for the image data stored in the storage section, by increasing/decreasing a number of the pixels of the image data according to the increased or decreased ratios; and
a card identifying section that identifies authentication of the card based on the moire data of the image data acquired by increasing/decreasing the number of pixels by the increasing/decreasing section, wherein
the increasing/decreasing section increases/decreases the number of pixels with different ratios respectively in a card capturing direction and in a direction perpendicular to the card capturing direction such that the ratios in the two directions are different from each other by at least a factor of two.
2. The card identifying apparatus according to claim 1 , further comprising:
a parameter setting section that sets increasing/decreasing ratios so that the increasing/decreasing section increases/decreases the number of pixels with predetermined increasing/decreasing ratios respectively in the card capturing direction and in a direction perpendicular to the card capturing direction.
3. The card identifying apparatus according to claim 1 , further comprising:
a reference data storage section that stores the reference data on the card,
wherein the card identifying section identifies authentication of the card by comparing the image data subjected to the increasing/decreasing processing of the pixels in the increasing/decreasing section with the reference data stored in the reference data storage section.
4. The card identifying apparatus according to claim 1 , wherein
the card identifying section detects the pixel data on the brightness for each pixel in the pixel portion where the moire data occur, compares said pixel data with the reference data, and when the difference is a predetermined value or less, regards the pixel portion as true.
5. The card identifying apparatus according to claim 1 , further comprising:
a card feeding mechanism that feeds the card, wherein
the reading section has a line sensor that reads the card fed by the card feeding mechanism over the feeding width direction of the card perpendicular to the card capturing direction.
6. The card identifying apparatus according to claim 1 , wherein the card is a bill.
7. A card identifying apparatus, comprising:
a reading means for reading a card on a pixel basis of a predetermined area as a unit including color information having a brightness;
a storage means for storing image data including a plurality of pixels read by the reading section;
an increasing/decreasing means for acquiring moire data specific to increasing or decreasing ratios, for the image data stored in the storage means, by increasing/decreasing a number of the pixels of the image data according to the increased or decreased ratios; and
a card identifying means for identifying authentication of the card based on the moire data of the image data acquired by increasing/decreasing the number of pixels by the increasing/decreasing means, wherein
the increasing/decreasing means increases/decreases the number of pixels with different ratios respectively in a card capturing direction and in a direction perpendicular to the card capturing direction such that the ratios in the two directions are different from each other by at least a factor of two.