Invention Grant
- Patent Title: Method for limiting total colorant coverage using multidimensional simplicial subdivision and barycentric interpolation
- Patent Title (中): 使用多维单纯细分和重心插值限制总着色剂覆盖的方法
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Application No.: US11692566Application Date: 2007-03-28
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Publication No.: US07889402B2Publication Date: 2011-02-15
- Inventor: James Zhixin Chang , John C. Dalrymple
- Applicant: James Zhixin Chang , John C. Dalrymple
- Applicant Address: US WA Camas
- Assignee: Sharp Laboratories of America, Inc.
- Current Assignee: Sharp Laboratories of America, Inc.
- Current Assignee Address: US WA Camas
- Agency: Kirton & McConkie
- Agent Michael F. Krieger; Adam D. Stevens
- Main IPC: H04N1/46
- IPC: H04N1/46 ; G03F3/08 ; H04N1/21 ; H04N1/23

Abstract:
Systems and methods for limiting total colorant in a color rendering system are disclosed. Implementation of the present invention provides for transformation of a specified colorant in which the sum of the colorant components exceeds a total area coverage (TAC) limit to create a second or resultant colorant in which the sum of the colorant components is within the limit. Using a bijective transformation, colorant sampling and other manipulations can be performed using a nominal hypercube space and the results can be compressed from the nominal space back to the actual colorant-limited space, simplifying manipulation of the colorant-limited polytope space. The unlimited colorant hypercube may be divided into simplexes. For each simplex, intersection points may be found between the TAC limit and the edges of the simplex. A barycentric interpolation technique may then be used to map the unlimited simplex onto a corresponding simplex within the colorant-limited polytope.
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