Efficient block-based coding of noisy images bycombining pre-filtering and DCT
Sung Deuk Kim, Sung Kyu Jang, Myung‐Joon Kim, Ra · Electronics Letters · 1999
An efficient block-based coding scheme for noisy images is proposed. Unlike a conventional encoder where pre-filtering, discrete cosine transforms (DCT), quantisation, and variable length coding (VLC) are cascaded, the proposed image coder has only a modified DCT and a VLC, and performs pre-filtering and quantisation simultaneously in the modified DCT operation.