Patent ID: 6181831
Filing Date: 2001-01-30
Classification: G06F,H04N

Abstract:
A method of processing a number of input arrays of image spatial frequency coefficients being transformable to image pixel values by a predetermined spatial frequency transformation, said method comprising the steps of:generating an output array of image spatial frequency coefficients from said number of input arrays;detecting which of said number of input arrays contain portions overlapped by said generated output array;generating at least one pixel domain translation matrix corresponding to each of said number of input arrays which contain portions overlapped by said generated output array;matrix-multiplying each pixel domain translation matrix the corresponding input array subjected to the inverse of said predetermined spatial frequency transformation, so that said means for matrix-multiplying provides a translation of the respective overlapped portion to an overlapping position in said output array;matrix-multiplying each of said number of input arrays by the respective one of the pixel domain translation matrices subjected to the inverse of said predetermined spatial frequency transformation; andmatrix-adding the matrix-multiplied image spatial frequency coefficients generated from each of said number of input arrays;means for outputting the results of said matrix-adding step.