Dithering system and method for use in image processing

Details Dithering system and method for use in image processing Dithering system and method for use in image processing

2011-01-04

2011-01-04

Johnson, M Good (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S690000, C345S063000

Reexamination Certificate

active

07864192

ABSTRACT:
A dithering system includes a linear transformer, a dither data generator, an adder and a shifter. The transformer linearly transforms M bit input data using a linear function having a predetermined gradient in order to generate and output M bit transform data. The dither data generator generates and outputs M−N bit dither data. The adder adds the M bit transform data and the M−N bit dither data to generate and output M bit correction data. The shifter cuts off the bottom M−N bits of the M bit correction data in order to generate and output the N bit output data. The dithering system and associated dithering method widely disperses an error generated due to a physical limit of a data bit that can be expressed by a low gray scale system throughout the entirety of the gray scales when high gray scale image data is converted to low gray scale image data. This is done without using a lookup table which avoids using valuable chip area. In addition, by utilizing a plurality of adders and shifters rather than a multiplier and divider, the number of required logic gates is remarkably reduced as well as reducing associated power requirements.

REFERENCES:
patent: 5586203 (1996-12-01), Spaulding et al.
patent: 6069609 (2000-05-01), Ishida et al.
patent: 6084560 (2000-07-01), Miyamoto
patent: 6559851 (2003-05-01), Schlapp
patent: 2000182069 (2000-06-01), None
patent: 1020050076442 (2005-07-01), None

Affiliated with

Also associated with

Rating

Dithering system and method for use in image processing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dithering system and method for use in image processing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dithering system and method for use in image processing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2742784