Invention Grant
- Patent Title: Blind defringing for color images
- Patent Title (中): 盲目排除彩色图像
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Application No.: US14726356Application Date: 2015-05-29
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Publication No.: US09443292B2Publication Date: 2016-09-13
- Inventor: Mark Zimmer
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blank Rome LLP
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06T5/00 ; G06T3/40

Abstract:
This disclosure pertains to novel devices, methods, and computer readable media for performing “blind” color defringing on images. In one embodiment, the blind defringing process begins with blind color edge alignment. This process largely cancels every kind of fringe, except for axial chromatic aberration. Next, the process looks at the edges and computes natural high and low colors to either side of the edge, attempting to get new pixel colors that aren't contaminated by the fringe color. Next, the process resolves the pixel's estimated new color by interpolating between the low and high colors, based on the green variation across the edge and the amount of green in the pixel that is being repaired. Care is taken to prevent artifacts in areas that generally do not fringe, like red-black boundaries and skin tone. Finally, the process computes the final repaired color by using luminance-scaling of the new pixel color estimate.
Public/Granted literature
- US20150348244A1 Blind Defringing For Color Images Public/Granted day:2015-12-03
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