A simple deblocking method for reduction of blocking artifacts

Abstract

The reconstructed images from block based DCT compression produce visible artifacts at block boundaries due to coarse quantization of coefficients. In this paper a post processing algorithm is proposed for reduces the blocking artifacts without removing perceptual quality. For smoothing and non smoothing regions are removed by modifying a few DCT coefficients, while a smoothing filter is applied for intermediate region. In the process of deblocking is used for correlation between the neighbouring blocks to reduce the discontinuity of pixels across the boundaries. Our experimental results show that the proposed method significantly reduces the blocking artifacts of still and video images.