Automatic removal of purple fringing from images

Details Automatic removal of purple fringing from images Automatic removal of purple fringing from images

2005-12-30

2009-08-18

Alavi, Amir (Department: 2624)

Image analysis

Color image processing

Color correction

C382S254000

Reexamination Certificate

active

07577292

ABSTRACT:
An automatic purple fringing removal system and method for automatically eliminating purple-fringed regions from high-resolution images. The technique is based on the observations that purple-fringing regions often are adjacent near-saturated regions, and that purple-fringed regions are regions in which the blue and red color intensities are substantially greater than the green color intensity. The automatic purple fringing removal system and method implements these two observations by automatically detecting a purple-fringed region in an image and then automatically correcting the region. Automatic detection is achieved by finding near-saturated regions and candidate regions, and then defining a purple-fringed region as a candidate region adjacent a near-saturated region. Automatic correction of a purple-fringed region is performed by replacing color pixels in the region with at least some fully monochrome pixels using a feathering process, a monochrome averaging process, or by setting the red and blue intensity values using the green intensity value.

REFERENCES:
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patent: 2006/0251322 (2006-11-01), Palum et al.
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patent: 2007/0153341 (2007-07-01), Kang
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patent: WO-2005117454 (2005-12-01), None
http://www.shaystephens.com/ca-ps.asp : Accessed on Nov. 9, 2005.
European Search Report, Application No. PCT/US2006/049125 completed Jun. 19, 2007, received Jun. 19, 2007.

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