A SYSTEM TO CODE IMAGES USING TWO CHANNELS / UM SISTEMA DE CODIFICAÇÃO DE IMAGEM VIA DOIS CANAIS

AUTOR(ES)
DATA DE PUBLICAÇÃO

1989

RESUMO

In this work it is presented na image compression technique where the image to be compressed is first split into two parts: a low-pass one, which represents the general área brightness, without Sharp contours, and a high-pass part, containing Sharp edge information. The low-frequency image in then coded by a orthonormal transform technique and the high-frequency one is coded using vector quantization. The visual quality of the reconstructed image is comparable to that produced by existing coders with similar complexity, for rates in the range 0.6-0.8 bits/pixel.

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