Patent Document ID: 7792357
Application ID: 11755357
Patent Status: 1

Claim One:
1. A computer-implemented process for reducing the effects of chromatic aberration (CA) in a digital color image captured without in-camera sharpening, comprising using a computer to perform the following process actions: identifying edge pixels in the image at locations where there is a readily identifiable, substantially co-located edge in each color channel, along with pixels within a prescribed distance of the edge pixels; super-sampling the image by a prescribed factor; designating one of the color channels as a reference channel; for each non-reference color channel, establishing an objective function representing a difference between the intensity of an identified pixel with regard to the reference color channel and the intensity of the pixel with regard to the non-reference color channel under consideration, after applying a CA removal function to the non-reference color channel pixel that substantially removes the effects of CA, wherein said CA removal function comprises a number of unknown CA parameters associated with the CA effect, computing a set of CA parameters that minimizes the objective function across all the identified pixels, and employing the set of CA parameters in the CA removal function to compute a new intensity value for each pixel in the image for the non-reference color channel under consideration; and sampling the image to return it to its original resolution.