Local cosine transform: a method for the reduction of the blocking effect in JPEG
G. Aharoni, Amir Z. Averbuch, Ronald R. Coifman, Moshe Israeli · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1993
This paper presents the Local Cosine Transform as a new method for the reduction and smoothing of the blocking effect that appears at low bit rates in image coding algorithms based on the Discrete Cosine Transform. In particular, the blocking effect appears in the JPEG baseline sequential algorithm.