Image contrast improvement technique for output scanning systems

Details Image contrast improvement technique for output scanning systems Image contrast improvement technique for output scanning systems

1993-12-06

1996-08-13

Reinhart, Mark J.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347247, 358298, H04N 121

Patent

active

055461115

ABSTRACT:
A raster output scanning system is disclosed which modifies a train of pixel information used for modulating a light beam to improve the image contrast. In this invention, all the On pixels which have at least one transitional edge will be modified in such a manner that the pulse width of the modified pixels will be shorter than the allocated pulse width for each pixel and the pulse amplitude of the modified pixels will be higher than the amplitude of the unmodified pixels. However, the product of the pulse width and the pulse amplitude of the modified pixels are equal to the product of the pulse width and the pulse amplitude of the unmodified pixels. The modified train of pixel information of this invention creates an exposure profile on the photoreceptor plane with less smearing effect and less variation of the pixel width in accordance with the variation of the xerographic threshold.

REFERENCES:
patent: 5426452 (1995-06-01), Davis et al.

Affiliated with

Also associated with

Rating

Image contrast improvement technique for output scanning systems 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 contrast improvement technique for output scanning systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image contrast improvement technique for output scanning systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1052008