Patent ID: 7139443
Filing Date: 2006-11-21
Classification: G06T

Abstract:
1. A signal processing method for producing interpolated signal values between sampled signal values in a sampled image signal produced by a checkerboard sampling pattern comprising: defining at least one interpolation location between said sampled signal values; extracting a block of 2N-by-2N signal values from said sampled signal values that corresponds to a block of sampling locations of said checkerboard sampling pattern, said block of sampling locations being surrounded by the Nth sampling location toward the upper direction from said interpolation location, the Nth sampling location toward the right direction from said interpolation location, the Nth sampling location toward the left direction from said interpolation location, and the Nth sampling location toward the lower direction from said interpolation location, where N is integer; producing a set of frequency coefficients by a discrete cosine transform with said block of 2N-by-2N signal values; producing at least one interpolated signal value that corresponds to a center location of said block of 2Nby-2N signal values by an inverse discrete cosine transform with said set of frequency coefficients, said inverse discrete cosine transform producing signal values between adjacent signal values of said block of 2N-by-2N signal values by decreasing an interval for reproduction of signal values; and applying said interpolated signal value to said sampled image signal as a signal value corresponding to said interpolation location.