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Efficient block-based coding of noisy images by combining pre-filtering and DCT

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4 Author(s)
Sung Deuk Kim ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea ; Sung Kyu Jang ; Myung Jun Kim ; Jong Beom Ra

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

Published in:

Electronics Letters  (Volume:35 ,  Issue: 20 )