Image reading device and image reading method
AssigneeSeiko Epson Corporation
InventorKazuya Takita
Life of this patent
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Abstract
When a multi-feed of a document is detected, an image reading device acquires a document width from image data generated by a reading unit reading a leading end portion of the document. The document width is a length of the document in a width direction intersecting a transport direction. When, based on the document width, the size of the document corresponds to a specific size of a plastic card or an instant film, the image reading device does not execute error processing in response to an occurrence of the multi-feed, and when the size of the document does not correspond to the specific size, the image reading device executes the error processing.
Claims10
An image reading device comprising:
- a transport unit configured to transport a document in a predetermined transport direction;
- a reading unit configured to read the document transported by the transport unit;
- a multi-feed detector provided at a position upstream of the reading unit in the transport direction and configured to detect a multi-feed of the document;
- and
- a control unit, wherein
- when the multi-feed detector detects the multi-feed of the document, the control unit
- acquires a document width from image data generated by the reading unit reading a leading end portion of the document, the document width being a length of the document in a width direction intersecting the transport direction,
- determines, based on the document width, whether a size of the document corresponds to a size of a plastic card or an instant film,
- does not execute error processing in response to an occurrence of the multi-feed when it is determined that the size of the document corresponds to the size of the plastic card or the instant film, and
- executes the error processing when it is determined that the size of the document does not correspond to the size of the plastic card or the instant film.
An image reading method comprising:
- a transporting step for transporting a document in a predetermined transport direction;
- a reading step for reading the transported document by a reading unit;
- a multi-feed detecting step for detecting a multi-feed of the document at a position upstream of the reading unit in the transport direction;
- and
- a control step, wherein
- when the multi-feed of the document is detected by the detecting the multi-feed of the document, the control step includes
- acquiring a document width from image data generated by the reading unit reading a leading end portion of the document, the document width being a length of the document in a width direction intersecting the transport direction,
- determining, based on the document width, whether a size of the document corresponds to a size of a plastic card or an instant film,
- not executing error processing in response to an occurrence of the multi-feed when it is determined that the size of the document corresponds to the size of the plastic card or the instant film, and
- executing the error processing when it is determined that the size of the document does not correspond to the size of the plastic card or the instant film.
Dependencies are inferred from the claim text.