Patent ID: 6124946
Filing Date: 2000-09-26
Classification: G06K,H04N

Abstract:
A multi-pass pseudo-random masking system, comprising:N number of sequenced pseudo-random number generators for randomizing a masking order of Z number of pixels in a given swath of image data to be printed by an n-pass print mode printer;each individual one of said generators producing a repetitive sequence of X number of individual pixel masking values for helping to substantially eliminate print artifacts in a printed image; anda sequencer responsive to a print command for initiating at least one n-pass printing sequence by said n-pass print mode printer;said sequencer including:an initializer for producing in response to said print command a seed value to initialize the sequencing of each individual one of said generators to initialize their sequencing at the same masking value so they each produce the same repetitive sequence of said X number of individual pixel masking values; andsaid initializer causing each generator to be loaded in a predetermined sequence with said seed value prior to commencing the printing of each given swath of image data.