Sheet paper identification device and method
View Patent ↗There are provided a sheet paper identification device and method capable of preventing use of the device in an abnormal state by preventing erroneous identification caused by dust attached to an interior of a pickup section, detecting the abnormal state in the pickup section due to the dust, and notifying it outside. When a sheet paper is inserted from a sheet paper insert section ( 3 ), the sheet paper is fed by a sheet paper feed section ( 4 ). An image pickup section ( 7 ) images the interior of the image pickup section ( 7 ) before the sheet paper is fed to the image pickup section ( 7 ) so as to acquire image data without any sheet paper so as to acquire image data having the sheet paper. A dust detection section ( 8 ) calculates the position and the area of the image indicating dust of the image data having no sheet paper. When the image data having the sheet paper has an image of the same area at the same position as the image indicating the dust, the image is identified as an image indicating the dust attached to the interior of the image pickup section ( 7 ) in the image data including the sheet paper. If the dust identified is other than a predetermined one, an abnormal state of the image pickup section ( 7 ) is notified to a control section ( 2 ).
1. A sheet paper identification device that images an image of sheet paper by means of an image pickup section located on a feed path for the sheet paper and identifies the sheet paper on the basis of image data of the sheet paper thus imaged and acquired, comprising:
image data acquisition means for acquiring sheet-paper-absent image data imaged and acquired by the image pickup section in a state where sheet paper has not yet arrived at the image pickup section and there is no sheet paper, and sheet-paper-present image data imaged and acquired in a state where sheet paper has arrived at the image pickup section and there is the sheet paper;
measurement means for measuring a position and area of an image in the sheet-paper-absent image data acquired by the image data acquisition means;
unwanted image discrimination means for discriminating an image that exists in the sheet-paper-present image data in the same position and over the same area as the image in the sheet-paper-absent image data measured by the measurement means as an unwanted image; and
sheet paper identification means for attaching the unwanted image discriminated by the unwanted image discrimination means to standard data found beforehand from genuine sheet paper in the same position and over the same area as the unwanted image, and identifying the authenticity of the sheet paper by comparing the standard data to which the unwanted image is attached with the sheet-paper-present image data.
2. The sheet paper identification device according to claim 1 , wherein
the unwanted image discrimination means binarizes the sheet-paper-absent image data and the sheet-paper-present image data that are acquired by the image data acquisition means, and identifies the image existing in the binarized sheet-paper-present image data in the same position and over the same area as the image in the sheet-paper-absent image data as the unwanted image.
3. The sheet paper identification device according to claim 1 , wherein
the sheet paper identification means identifies the sheet paper on the basis of the sheet-paper-present image data acquired by the image data acquisition means in a case where the total area of the unwanted image discriminated by the unwanted image discrimination means is within a predetermined value.
4. The sheet paper identification device according to claim 2 , wherein
the sheet paper identification means identifies the sheet paper on the basis of the sheet-paper-present image data acquired by the image data acquisition means in a case where the total area of the unwanted image discriminated by the unwanted image discrimination means is within a predetermined value.
5. A sheet paper identification method that images an image of sheet paper by means of an image pickup section located on a feed path for the sheet paper and identifies the sheet paper on the basis of image data of the paper sheet thus imaged and acquired, comprising:
acquiring, by image data acquisition device, sheet-paper-absent image data imaged and acquired by the image pickup section in a state where sheet paper has not yet arrived at the image pickup section and there is no sheet paper, and sheet-paper-present image data imaged and acquired in a state where sheet paper has arrived at the image pickup section and there is the sheet paper;
measuring, by measurement device, a position and area of an image in the sheet-paper-absent image data acquired by the image data acquisition device;
discriminating, by unwanted image discrimination device, an image that exists in the sheet-paper-present image data in the same position and over the same area as the image in the sheet-paper-absent image data measured by the measurement device as an unwanted image; and
attaching, by sheet paper identification device, the unwanted image discriminated by the unwanted image discrimination device to standard data found beforehand from genuine sheet paper in the same position and over the same area as the unwanted image, and identifying the authenticity of the sheet paper by comparing the standard data to which the unwanted image is attached with the sheet-paper-present image data.
6. The sheet paper identification method according to claim 5 , wherein
the unwanted image discrimination device binarizes the sheet-paper-absent image data and the sheet-paper-present image data that are acquired by the image data acquisition device, and identifies the image existing in the binarized sheet-paper-present image data in the same position and over the same area as the image in the sheet-paper-absent image data as the unwanted image.
7. The sheet paper identification method according to claim 5 , wherein
the sheet paper identification device identifies the sheet paper on the basis of the sheet-paper-present image data acquired by the image data acquisition device in a case where the total area of the unwanted image discriminated by the unwanted image discrimination device is within a predetermined value.
8. The sheet paper identification method according to claim 6 , wherein
the sheet paper identification device identifies the sheet paper on the basis of the sheet-paper-present image data acquired by the image data acquisition device in a case where the total area of the unwanted image discriminated by the unwanted image discrimination device is within a predetermined value.