Patent ID: 7388609
Filing Date: 2008-06-17
Classification: H04N

Abstract:
1. A method of identifying and correcting defective ones of an array of photo-sensitive pixels, comprising: directing an object field of varying light intensity across the array, calculating difference values between outputs of individual ones of the pixels and a plurality of neighboring pixels, if the difference values for a given one of the pixels have different signs, utilizing the output of the given pixel for data of the object field, if the difference values for the given pixel have the same sign, determining whether the difference values are in excess of a threshold, wherein said threshold includes either of at least first or second quantities that are different from each other depending upon a distance between the given pixel and individual ones of its neighboring pixels, if the difference values are not in excess of the threshold, utilizing the output of the given pixel for data of the object field, and if the difference values are in excess of the threshold, calculating a value of the given pixel from at least some of the neighboring pixels and utilizing the calculated pixel value for data of the object field.