IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS AND IMAGE PROCESSING METHOD

摘要

A local density calculation section calculates a density of a pixel region with a predetermined size including a current point of an input image disposed at the center on the basis of a pixel value of the pixel region. A mixing ratio calculation section generates a coefficient set of coefficients alpha and beta in accordance with a local density value calculated by the local density calculation section, and outputs the generated coefficients alpha and beta to a weight process section. The weight process section multiplies an operation result obtained from the input image by a first filter operation section by the coefficient alpha, multiplies an operation result obtained from the input image by a second filter operation section by the coefficient beta, adds the multiplied results to each other and outputs the result of addition as a process result of a spatial filter process section.