Image Coding at very Low Bit Rates with Regular Triangular Mesh

Cesar S. Barreto, Gelson V. Mendonça, Eduardo A. B. da Silva

DOI: 10.14209/its.2002.344

Evento: 2002 International Telecommunications Symposium (ITS2002)

Keywords:

Abstract

"A method to code images by approximating them by a triangular mesh is presented. The coder encodes only the amplitudes of mesh nodes (triangle vertices) and the directions and shapes of mesh triangles. The decoder obtains the pixel amplitudes by interpolating the vertex amplitudes of the triangles they belong to. Since the used mesh is regular, the chosen size of the mesh triangles influences the quality of the reconstructed image. Using 16\u00d78-pixel triangles, the compression ratios that lead to the most competitive results are around 256:1 (very low bitrates). Results obtained hitherto are very promising, even when compared with state-of-the-art wavelet coders, thus motivating us in further explorations."

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