Patent ID: 11876934
Assignee: SEIKO EPSON CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image reading apparatus, comprising:
a reading unit that reads a document;
a background plate that serves as a background of the document; and
a multifeeding detecting unit that detects multifeeding of the document, and
a control unit, wherein
the control unit is configured to cause the reading unit to read a shadow, generated at the background plate, of the document, and
the control unit is configured to not determine occurrence of multifeeding when the multifeeding detecting unit detects multifeeding and a pixel value of the read shadow exceeds a predetermined threshold value, and
to determine occurrence of multifeeding when the multifeeding detecting unit detects multifeeding and the pixel value of the read shadow does not exceed the predetermined threshold value.