Filter circuit, image processing apparatus, imaging apparatus, image processing method, and computer program

摘要

A filter circuit includes: a first weight-coefficient calculating unit calculating first weight coefficients concerning pixel levels in a first pixel and second pixels surrounding the first pixel; a first weight-coefficient adjusting unit replacing, when the first weight coefficients of a pair of the second pixels symmetrically arranged across the first pixel are different from each other, the first weight coefficient of the second pixel having a larger one of the first weight coefficients of the pair of the second pixels with the first weight coefficient of the second pixel having a smaller one of the first weight coefficients; a third weight-coefficient calculating unit integrating the first weight coefficients and second weight coefficients concerning positions of the pixels to calculate third weight coefficients of the pixels; and a correction processing unit correcting the pixel level of the first pixel using the third weight coefficients and the pixel levels of the pixels.