Digital halftoning

H - Electricity – 04 – N

Patent

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Details

H04N 1/405 (2006.01) H04N 1/40 (2006.01)

Patent

CA 2442100

In one aspect of the present invention, a method is provided for producing a halftone of a source image. The halftone includes halftone pixels. The halftone pixels are suitable for containing halftone dots. The method selects glyphs corresponding to intensities of regions (e.g., pixels) in the source image. The glyphs contain one or more halftone dots. The method located halftone dots within the halftone pixels such that for at least one pair of halftone dots contained within a pair of halftone pixels sharing a common boundary, the halftone dots in the pair of halftone pixels extend in opposite directions form the common boundary.

Dans un aspect de cette invention, un procédé permet de produire une image en simili d'une image source. Cette image en simili comprend des pixels en ton continu. Ces pixels en ton continu sont adaptés pour contenir des points en ton continu. Ce procédé consiste à sélectionner des glyphes correspondant à des intensités de régions (par exemple des pixels) dans l'image source. Ces glyphes contiennent un ou plusieurs points en ton continu. Ce procédé consiste à localiser des points en ton continu dans les pixels en ton continu de sorte que pour au moins une paire de points en ton continu contenue dans une paire de pixels en ton continu partageant une frontière commune, les points en ton continu dans la paire de pixels en ton continu se situent dans des directions opposées à cette frontière commune.

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