Patent ID: 6148115
Filing Date: 2000-11-14
Classification: G06T

Abstract:
An image processing apparatus for performing a smoothing process on a decoded image signal having pixel values of a plurality of pixels, said apparatus comprising:detection means for detecting edge information of a pixel in response to a spatial change in the pixel values of said image signal and comprising a two-dimensional linear differential filter to filter the image signal, said detection means computes the edge information that represents a comparison result of the output value of said filter with a predetermined threshold value;smoothing means responsive to the edge information for performing the smoothing process on said image signal based on said edge information; decoding means for decoding a coded image signal, said coded image signal being a signal coded through at least a quantization process;said decoding means inverse quantizes said coded image signal according to a predetermined quantization step; andsaid detection means sets said threshold value in accordance with the value of said quantization step.