A DWT-based Deblocking Technique Based on Edge Detection and Zero Masking for Reducing Blocking Effect

Abstract

To reduce blocking artifacts and enhance visual quality, a simple and efficient DWT-based technique is proposed for post-processing of block-based encoded images. Basically, the technique proposed in this paper removes the blocking artifacts that appear in smooth blocks within the DWT frequency domain. From the experimental results, we see that the proposed technique can easily and effectively remove the blocking artifacts as well as enhance the visual quality of an image. In addition, compared with some other current deblocking methods, the deblocked images created by using the proposed technique have higher PSNR.