A Blocking Artifact Reduction Method Based on Gradient Estimating in Frequency Domain
Dong Zhifang · Dianzi qijian · 2013
In order to reduce blocking artifacts caused by the compression based on Block-based Discrete Cosine Transform(BDCT),DCT(Discrete Cosine Transform)coefficients are estimated by calculating the gradient of images and changed by frequency domain filtering based on HVS(Human Visual Sensitivity).Blocking artifacts are reduced efficiently by this method and blurring artifacts caused by many other frequency domain filtering methods are avoided.