A NOVEL-APPROACH FOR REDUCTION OF BLOCKING EFFECTS IN LOW-BIT-RATE IMAGE COMPRESSION

In this letter we propose a new approach for removing blocking artifac ts in reconstructed block-encoded images, The key of the approach is u sing piecewise similarity within different parts of the image as a pri ori to give reasonable modifications to the block boundary pixels, Thi s makes our approach different from traditional ones, which are often developed by applying some kinds of smoothing constraints on local reg ions. Experimental results show that our approach well achieves enhanc ed decoding for JPEG-decoded images both objectively and subjectively.