Dither volume with three thresholds for each cell location

Details Dither volume with three thresholds for each cell location Dither volume with three thresholds for each cell location

2007-10-02

2007-10-02

Grant, II, Jerome (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900

Reexamination Certificate

active

10636288

ABSTRACT:
While a general large layer dither volume provides great flexibility in dither cell design, by decoupling different intensity levels, they are inefficient to access since each colour component requires the retrieval of a different bit from the volume. Therefore in a multi threshold dither volume for digital halftoning a contone colour image, in the form of an array of contone colour pixel values to bi-level dots, there is allocated for each dither cell location a fix set of n thresholds defining n+1 intensity intervals within which said dither cell location is defined to be alternatively not set and set.

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