Invention Grant
US08019150B2 Color quantization based on desired upper bound for relative quantization step
有权
基于用于相对量化步长的期望上限的颜色量化
- Patent Title: Color quantization based on desired upper bound for relative quantization step
- Patent Title (中): 基于用于相对量化步长的期望上限的颜色量化
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Application No.: US11870904Application Date: 2007-10-11
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Publication No.: US08019150B2Publication Date: 2011-09-13
- Inventor: Sergey N. Bezryadin
- Applicant: Sergey N. Bezryadin
- Applicant Address: US CA South San Francisco
- Assignee: KWE International, Inc.
- Current Assignee: KWE International, Inc.
- Current Assignee Address: US CA South San Francisco
- Agency: Haynes and Boone, LLP
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06K9/36 ; G06K9/38 ; G06K9/46 ; G09G5/02
Abstract:
A computer system (810) receives a desired upper bound δSmax for a relative quantization step ∥S′−S″∥/∥S′∥ to be used when quantizing any color in some range of colors. Here S′ and S″ are adjacent colors in the set of colors to be made available for the quantized image, and ∥·∥ is a norm in a 70%-orthonormal linear color coordinate system, the norm being the square root of the sum of squares of the tristimulus values. The computer system determines (510) suitable quantization steps for the brightness coordinate (B) and the chromatic coordinates (e,ƒ) in anon-linear color coordinate system, and quantizes (520) the brightness and chromatic coordinates accordingly.
Public/Granted literature
- US20090096809A1 COLOR QUANTIZATION BASED ON DESIRED UPPER BOUND FOR RELATIVE QUANTIZATION STEP Public/Granted day:2009-04-16
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