Efficient Deblocking of Block-Transform Compressed Images and Video using Shifted Thresholding

A. Wong and W. Bishop (Canada)

Keywords

deblocking, blocktransform coding, shifted thresholding

Abstract

Image and video compression are active areas of research due to the increasing demand for efficient storage of visual data in a wide variety of fields. Popular image compression schemes are often based on block-transform coding. Block-transform coding is susceptible to blocking artifacts, particularly at low bit-rates due to quantization errors. This paper addresses this problem by presenting an algorithm based on shifted thresholding that reduces blocking artifacts in block-transform compressed images and video. The algorithm is designed to be hardware-efficient and well-suited for parallel hardware implementation, using purely integer computations without the need for integer division. Experimental results demonstrate good subjective quality improvements that are comparable with previous work while maintaining a low computational complexity.

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