Abstract
JPEG (Joint Photographic Experts Group) baseline algorithm is widely used because of its high compression capability. The algorithm has characteristics that the degradation of image quality becomes to be perceived as compression ratio becomes high. The eyesore degradations are false contour and mosquito noise. The new method of improving the image quality is proposed. The first step: false contour areas are extracted from image and the second step: the areas are smoothed by fitting process. It is confirmed that this method is effective in improving the image quality degraded by JPEG high compression.
