Patent ID: 8248492
Filing Date: 2012-08-21
Classification: G06T,H04N

Abstract:
1. An image processing apparatus which performs edge preserving processing on an input image, comprising: frequency-value calculation means for calculating, in luminance blocks into which pixels included in spatial blocks obtained by dividing the input image in a spatial direction are classified in accordance with luminance values of the pixels whereby the spatial blocks are further divided in a luminance direction, frequency values of the pixels which belong to the luminance blocks; characteristic-value calculation means for calculating characteristic values representing characteristics of the luminance blocks; and weighted product-sum means for performing edge preserving smoothing on the input image at pixel positions of the input image, by performing weighted mean on the characteristic values using the characteristic values and the frequency values of neighborhood luminance blocks which are included in the luminance blocks obtained from some of the spatial blocks in the vicinity of the pixels in accordance with a distance between the pixels and the neighborhood luminance blocks in the spatial direction and the luminance direction.