Image analysis – Image enhancement or restoration – Variable threshold – gain – or slice level
Patent
1994-10-24
1997-03-04
Couso, Jose L.
Image analysis
Image enhancement or restoration
Variable threshold, gain, or slice level
G06K 938
Patent
active
056088230
ABSTRACT:
An image reading apparatus includes an image sensing unit for photoelectrically reading an original image, and outputting an image signal, a converter unit for converting the image signal from the image sensing unit into density data representing density levels of a plurality of steps, a detection unit for detecting frequencies of appearance in units of density levels of the density data from the converter unit, and a correction unit for correcting the density levels expressed by the density data from the converter unit on the basis of the frequencies of appearance detected by the detection unit.
REFERENCES:
patent: 4791678 (1988-12-01), Iwase et al.
patent: 4792979 (1988-12-01), Nomura et al.
patent: 4839696 (1989-06-01), Ohtani
patent: 4907286 (1990-03-01), Yamada
Canon Kabushiki Kaisha
Couso Jose L.
LandOfFree
Image reading apparatus for correcting density levels 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 reading apparatus for correcting density levels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reading apparatus for correcting density levels will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2153489