Method and apparatus for forming color transform lookup...

Details Method and apparatus for forming color transform lookup... Method and apparatus for forming color transform lookup...

2006-03-07

2006-03-07

Williams, Kimberly (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S525000, C358S518000, C345S604000, C345S601000, C345S602000, C708S290000, C382S300000, C382S167000

Reexamination Certificate

active

07009734

ABSTRACT:
Disclosed are a method and apparatus for forming a color transform lookup table which helps output a smooth image having no pseudo contour and excellent in granularity. On the basis of a previously formed table, a color space is expressed by a basic triangle of white-primary color-black, and output signal values corresponding to lattice points in this basic triangle are calculated by linear interpolation. Black ink and cyan ink are replaced by setting a straight line AB, as a boundary line, connecting two points immediately before black ink begins to be introduced on two sides of the basic triangle.

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