Method and apparatus for thinning printed images
Inventors:
Denber, Michel J.; and Jankowski, Henry P.
View document:
https://patents.google.com/patent/US5250934A/en
Abstract
A method and apparatus are shown for improving bit-image quality in video display terminals and xerographic processors. In one embodiment, each scan line of a source image is ANDed with the scan line above to remove half-bits and thin halftones. In other embodiments, entire blocks of data are processed by bit-block transfer operations, such as ANDing a copy of the source image with a copy of itself shifted by one bit. Also, a source image can be compared to a shifted copy of itself to locate diagonal lines in order to place gray pixels bordering these lines.
Application Number: US07/636,395
Filing Date: 1990-12-31
Issuing Authority: United States
Patent Number: US5250934A