Patent ID: 7294817
Filing Date: 2007-11-13
Classification: H04N

Abstract:
1. A method for determining nonuniformity correction parameters for a detector array, the method comprising the steps of: for each element of the detector array, generating a plurality estimated and observed intensity pairs, wherein the estimated intensities for each element is calculated based upon corresponding observed intensities for that element; generating a plurality of estimates of uncorrupted images, each of the estimates being generated by fitting a parametric patch model to the plurality estimated and observed intensity pairs for a neighborhood of noisy image samples, each uncorrupted image uniquely corresponding to one of a plurality of noisy images; and determining at least one nonuniformity correction parameter by fitting a parametric curve to the plurality of estimates and the plurality of noisy images corresponding to each of the estimates; identifying whether one or more elements of the detector array is faulty based upon the fitted parametric model and, if at least one detector is determined to be faulty, suppressing the output of the at least one faulty detector.