Abstract: A method of processing a digital image comprising the steps of:providing an input digital image having an input size;providing the output size of a desired output digital image;inputting the provided input digital image and the provided desired output digital image size to a weight estimation sub-system which operates to generate several weight derivative estimates;inputting the provided input digital image to an x-direction derivative estimation sub-system which produces an array of x-direction derivative estimates;inputting the provided input digital image, the weight derivative estimates and the x-direction estimates to an x-direction interpolated value estimation subsystem which produces in intermediate digital image which has the same number of rows as said input digital image while having the same number of columns as said output digital image;operating on said intermediate digital image by a y-direction derivative estimation sub-system to produce y-direction derivative estimates;inputting the intermedi

Abstract: A method for detecting grids in a digital image having a plurality of pixels for capturing an image, comprises the steps of performing a high pass filter operation on a sample of pixels for filtering out the image from the sampled pixels; and performing a statistical F-test operation on the results of the high pass filter operation for determining when the digital image contains grids.