Rate-distortion optimal fast thresholding with complete JPEG/MPEG decoder compatibility
Kannan Ramchandran, Martin Vetterli · IEEE Transactions on Image Processing · 1994
We show a rate-distortion optimal way to threshold or drop the DCT coefficients of the JPEG and MPEG compression standards. Our optimal algorithm uses a fast dynamic programming recursive structure. The primary advantage of our approach lies in its complete compatibility with standard JPEG and MPEG decoders.