Transactions Letters A Practical Postprocessing Technique for Real-Time Block-Based Coding System

Abstract—In this paper, a noniterative postprocessing method is proposed to restore the images encoded with block-based com-pression standards such as Joint Photographic Experts Group (JPEG). This method classifies small local boundary regions ac-cording to their intensity distribution and then selects appropriate linear predictors to estimate the corresponding boundary pixels in the regions. This approach is easy to implement and we found in our simulations that its restoration performance was very respectable compared with the reported postprocessing methods. Index Terms — Block-based coding, codec, deblocking, image restoration, JPEG, postprocessing technique, vector quantization