Pattern rendering system and method

Details Pattern rendering system and method Pattern rendering system and method

H - Electricity

04

N

H04N 1/405 (2006.01) G06T 7/00 (2006.01) H04N 1/40 (2006.01)

Patent

CA 2356813

Techniques for black and white pattern rendering that increase processing speed and reduce memory requirements while providing improved pattern selection performance are provided. The hue angle and lightness of a color input are determined. The hue angle is used to index into a lookup table of halftone functions that specify default frequency and spot functions for a hue angle range. For each selected halftone, the determined hue angle is substituted from the hue angle range if the determined hue angle differs from the last determined hue angle range by more than a threshold difference value. The determined lightness is used to determine the halftoning threshold value and rendering then occurs.

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