Image analysis – Image compression or coding – Transform coding
Reexamination Certificate
2005-03-22
2005-03-22
Tran, Phuoc (Department: 2621)
Image analysis
Image compression or coding
Transform coding
C382S240000, C382S233000
Reexamination Certificate
active
06870962
ABSTRACT:
A method and apparatus for efficiently encoding images using a set of non-orthogonal basis functions, thereby allowing reduction of file size, shorter transmission time, and improved accuracy. The non-orthogonal basis functions include homogenous color basis functions, luminance-encoding basis functions that have luminance edges and chromatic basis functions that exhibit color opponency. Some of the basis functions are non-orthogonal with respect to each other. Using these basis functions, a source vector is calculated to provide a number of coefficients, each coefficient associated with one basis function. The source vector is compressed by selecting a subset of the calculated coefficients, thereby providing an encoded vector. Because the method is highly efficient, the image data is substantially represented by a small number of coefficients. In some embodiments, the non-orthogonal basis functions include two or more classes. A wavelet approach can also be utilized.
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Lee Te-Won
Sejnowski Terrence J.
Wachtler Thomas
Morrison & Foerster / LLP
The Salk Institute for Biological Studies
Tran Phuoc
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