Image reader and document curvature measurement using visible an

Details Image reader and document curvature measurement using visible an Image reader and document curvature measurement using visible an

1997-04-10

1999-03-23

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358474, 358493, G01L 2700, G02B 2728, G02B 530

Patent

active

058863427

ABSTRACT:
This invention relates to an image reader capable of reading document images in parallel with the measurement of the state of curvature of the document surface, and correcting image distortion caused by said curvature in real time. An illumination light source for reading documents is provided with a filter to separate infrared light and visible light. The visible light is used to read document image information, and the infrared light is used to measure the state of curvature of the document. Since document reading and document curvature measurement are accomplished using light having different characteristics, these operations can be accomplished simultaneously.

REFERENCES:
patent: 5084611 (1992-01-01), Okisu et al.
patent: 5705806 (1998-01-01), Matsuda et al.
patent: 5760925 (1998-06-01), Saund et al.
patent: 5764379 (1998-06-01), Matsuda et al.

Affiliated with

Also associated with

Rating

Image reader and document curvature measurement using visible an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image reader and document curvature measurement using visible an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reader and document curvature measurement using visible an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2128528