Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Reexamination Certificate
2005-08-16
2005-08-16
Mehta, Bhavesh M. (Department: 2621)
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
C382S244000
Reexamination Certificate
active
06931158
ABSTRACT:
The present invention is embodied in a system and method for compressing image data using a lapped biorthogonal transform (LBT). The present invention encodes data by generating coefficients using a hierarchical LBT, reorders the coefficients in a data-independent manner into groups of similar data, and encodes the reordered coefficients using adaptive run-length encoding. The hierarchical LBT computes multiresolution representations. The use of the LBT allows the present invention to encode image data in a single pass at any desired compression ratio and to make use of existing discrete cosine transform (DCT) software and hardware modules for fast processing and easy implementation.
REFERENCES:
patent: 6771828 (2004-08-01), Malvar
Dang Duy M.
Fischer Craig S.
Lyon & Harr L.L.P.
Mehta Bhavesh M.
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