Digital color video image enhancement for a diffusion dither circuit
AssigneeATI Technologies, Inc.
InventorSanford S. Lum
Life of this patent
Estimating the term…
Abstract
Enhancing each pixel of a digital color video image by, for each component part of a source pixel, successively adding a truncation error of an immediately preceding previous pixel in an X direction to a current pixel. A resulting value is truncated to form a truncation error and most significant bits, and the most significant bits are provided to a destination line.
Claims5
A method of enhancing a digital color video image comprising:
- (a) receiving a pixel component in a scan line and truncating the pixel component to obtain a truncation error,
- (b) temporarily saving the truncation error,
- (c) receiving a component of a next pixel in the scan line and adding the truncation error to that next pixel component to obtain a resultant pixel component,
- (d) truncating said resultant pixel component to obtain another truncation error,
- (e) temporarily saving the latter truncation error,
- (f) repeating steps (c), (d) and (e) progressively for substantially each pixel component in the scan line, and
- (g) repeating steps (a)-(f) for substantially all scan lines in the image.
A method of enhancing a digital color video image comprising, for each component part of a source pixel, successively adding a truncation error of an immediately preceding previous pixel component, other than a first preceding previous pixel, in an X direction to a current pixel component, truncating a resulting value to form a truncation error and most significant bits, and providing the most significant bits to a destination line
A method of enhancing a digital color video image comprising:
- (a) receiving a pixel component of a scan line and truncating the pixel component to obtain a truncation error,
- (b) temporarily saving one-half of the truncation error,
- (c) receiving a following next pixel component of the scan line and adding said one-half the truncation error thereto and one-half the truncation error of an adjacent pixel component from a previous line, if any, to form an adjusted next pixel component,
- (d) truncating said adjusted next pixel component to obtain another truncation error,
- (e) repeating steps (c) and (d) progressively for substantially each corresponding component pixel in the scan line,
- (f) repeating steps (a)-(e) for substantially all scan lines in the image.
Dependencies are inferred from the claim text.