System and method for correcting image vignetting

Details System and method for correcting image vignetting System and method for correcting image vignetting

2005-03-07

2009-12-15

Bali, Vikkram (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C382S254000, C382S276000, C382S260000, C382S261000

Reexamination Certificate

active

07634152

ABSTRACT:
A method of correcting vignetting in an image. The image includes a plurality of pixels, each pixel having an intensity. The image is flattened by adjusting the intensity of each pixel based on a vignette function representative of vignetting characteristics of the image, the vignette function having a plurality of free parameters, each free parameter having a value. A vignette metric is determined based on the flattened image. The values of one or more of the free parameters are adjusted based on the vignette metric, and the flattening is performed based on the adjusted values of the free parameters.

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