Method and system for filtering image noise out

摘要

The present invention discloses a method and system for filtering image noise; the system includes: an image acquisition unit, a judgment unit, a first filtering unit, a second filtering unit and a selecting unit; the steps includes: selecting a pixel in one of the color channels in YUV image to detect; according to all the pixels in the N*M matrix which centers on the pixel currently detected, judging whether the pixel is in a flat region; and if the pixel is in a flat region, according to the Y-component of all the pixels inside the N*M matrix, calculating and outputting the filtering strength parameter of the pixel, and then filtering the pixel according to the filtering strength parameter; the positive effects of the mentioned technical scheme are: easy in calculation; retaining image details efficiently, restoring the original color of image and improving the quality of the filtered image after filtering.