Speckle noise reduction
Speckle noise reduction
Speckle noise reduction
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<strong>Speckle</strong> <strong>noise</strong> <strong>reduction</strong>: a review – Ph. Courmontagne<br />
14<br />
‣ Principle:<br />
Adaptive Filters in Transform Domain<br />
The idea is to apply different signal decompositions to the SAS<br />
data just followed by a process adapted to the new domain<br />
Two main families of expansion<br />
Discrete Wavelet Transform (Multi-resolution analysis)<br />
Signal expansion in a weighted sum of uncorrelated<br />
random variables, where the basis depends on a priori<br />
knowledge of signal and <strong>noise</strong> statistics
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