Improved error diffusion system

Details Improved error diffusion system Improved error diffusion system

H - Electricity

04

N

H04N 1/387 (2006.01) H04N 1/405 (2006.01)

Patent

CA 2112469

For highlight or dark areas of images, the error terms (52) diffused to neighbourhood pixels includes components which are periodic with respect to a wavelength where the wavelength is a function of the density level of the pixels from which the error terms are diffused. In this manner, patterned artifacts or "worms" in the highlight or dark areas of the images are reduced or illuminated.

Pour les zones lumineuses ou sombres des images, les termes d'erreur (52) diffusés aux pixels voisins renferment des composantes qui sont périodiques par rapport à une longueur d'onde qui est fonction d'un degré de densité de pixels à partir duquel les termes d'erreur sont diffusés. Il est possible, de cette façon, de réduire ou d'éclairer des artefacts à motifs dans les zones claires ou les zones sombres d'une image.

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