Invention Grant
- Patent Title: Neutral pixel detection in an image path
- Patent Title (中): 图像路径中的中性像素检测
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Application No.: US12042370Application Date: 2008-03-05
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Publication No.: US08165388B2Publication Date: 2012-04-24
- Inventor: Xing Li
- Applicant: Xing Li
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agency: Fleit Gibbons Gutman Bongini & Bianco P.L.
- Agent Philip E. Blair
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06K9/46 ; G06K9/66 ; G06K9/40 ; G06K1/00 ; G06F15/00 ; H04N1/60 ; H04N1/46 ; G03F3/08

Abstract:
A system and method for pixel and object level neutral detection. An image is scanned into a plurality of pixels. A local pixel of interest is identified along with a neighborhood of pixels around the local pixel. The chroma value of the current pixel as well as the average local chroma of the neighborhood are calculated. An adjusted chroma is determined based on the average local chroma. A luminance value can also be measured for the current pixel and for each of the neighbor pixels and a luminance variation determined. The adjusted chroma can be further modified based on the determined luminance variation. The adjusted chroma is compared against a threshold to determine a neutral pixel detection tag for the current pixel. The pixel tags can be utilized to control an adjustment of pixels in a device independent L*a*b* or a device independent CMYK domain.
Public/Granted literature
- US20090226082A1 NEUTRAL PIXEL DETECTION IN AN IMAGE PATH Public/Granted day:2009-09-10
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