发明名称 |
PROCESSING OR COMPRESSING N-DIMENSIONAL SIGNALS WITH WARPED WAVELET PACKETS AND BANDLETS |
摘要 |
A method and apparatus for processing or compressing an n-dimensional digital signal by constructing a sparse representation which takes advantage of the signal geometrical regularity. The invention comprises a warped wavelet packet transform which performs a cascade of warped subband filtering along warping grids of sampling points adapted to the signal geometry. It also comprises a bandeletisation which decorrelates the warped wavelet packet coefficients to produce a sparse representation. An inverse warped wavelet packet transform and an inverse bandeletisation reconstruct a signal from its bandelet representation. The invention comprises a compression system which quantizes and codes the bandelet representation, a decompression system, a restoration system which enhances a signal by filtering its bandelet representation, and a feature vector extraction system for pattern recognition applications of a bandelet representation. |
申请公布号 |
EP1574067(A1) |
申请公布日期 |
2005.09.14 |
申请号 |
EP20020798365 |
申请日期 |
2002.12.17 |
申请人 |
LET IT WAVE |
发明人 |
BERNARD, CHRISTOPHE;KALIFA, JEROME;LE PENNEC, ERWAN;MALLAT, STEPHANE |
分类号 |
H04N19/60;H04N7/26;H04N7/30;H04N19/62 |
主分类号 |
H04N19/60 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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