Patent №
US 6,438,271
Granted
2002-08-20
Filed 1998
Owner
CANON KABUSHIKI KAISHA
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
09110143
Two or more original illumination units are mounted on an image reading apparatus. In reading a patched original, an image read while being illuminated along one direction is compared with an image read while being illuminated along another direction or along two directions including the one direction and another direction. In accordance with an image data difference between the two images, image processing or illumination light amount changing is performed to erase shades to be caused by a patched portion of the original.
AI classification
Ownership
CANON KABUSHIKI KAISHA
assignment · 94040911
Assignors
USAMI, AKIHIRO, ITO, YOSHINORI
On an employer assignment, the assignors are typically the inventors.