Periodical pattern suppression processing method and apparatus

摘要

A method and apparatus for periodical pattern suppression processing capable of suppressing the spatial frequency component of periodical patterns occurring in image signals without deteriorating the image quality thereof, and achieving these results in a reduced processing time. The spatial frequency component corresponding to a periodical pattern included in an image signal is extracted from the image signal by subjecting the image signal to a one-dimensional filtering process in the same direction as that of the periodical pattern and in the direction perpendicular to that of the grid image. By subtracting the extracted spatial frequency component from the image signal, the spatial frequency component occurring in the image signal is suppressed.