Image storage and transmission method uses hierarchical mesh system for decomposition and reconstruction of source image

摘要

The method includes use of a hierarchical mesh which defines nested spaces, each corresponding to a decomposition level of the meshing. The process consists, at least at a decomposition level n (except at the first level), of delivering only image coefficients expressed in a base of functions defined in a space orthogonal to the spaced corresponding to the preceding decomposition level (n-1). The method for encoding a source image includes use of a hierarchical mesh which defines at least two nested spaces, each corresponding to a decomposition level of the meshing. The process consists, at least at a decomposition level n (except at the first level), of delivering only image coefficients expressed in a base of functions defined in a space orthogonal to the spaced corresponding to the preceding decomposition level (n-1). The functions are selected so that the image coefficients enable optimization for the decomposition level, n, of the data already transmitted for the preceding decomposition level, n-1. This produces a reconstructed image, representing the source image, with optimized restoration quality for the specific decomposition level, n.