Patent ID: 8305654
Filing Date: 2012-11-06
Classification: G03B,H04N

Abstract:
1. An image scanning apparatus comprising: an original document platen on which an original document can be placed; an original document pressing member arranged to press and position the original document placed on the original document platen; an image scanning sensor arranged to scan image information of the original document; a light source arranged to be used when scanning the image information; a detection unit arranged to detect a first timing that is set in a process of closing the original document pressing member and to detect a second timing that is set in the process of closing the original document pressing member and that is different from the first timing; a control unit arranged to light the light source at least two timings corresponding to the first timing and the second timing when the original document pressing member is being closed, and to scan the image information by the image scanning sensor; a difference calculating unit arranged to calculate differential data between first image information scanned at the first timing and second image information scanned at the second timing; and an original document size determining unit arranged to determine a size of the original document based on the differential data.