Multi Direction Lee Filter
Copyrights (c) 2003 by Andre Ringeler
This Multi Direction Lee Filter is a enhanced Lee Filter
It looks into 16 directions for the direction with the minium variance
and applied a Lee Filter on this direction.
Uses this filter for remove speckle noise in SAR images or DTMs.
On DTMs this filter will preserves the slope and narrow valleys.
For details on the Lee Filter, see the article by Jong-Sen Lee:
"Digital Image Enhancement and Noise Filtering by Use of Local Statistics",
IEEE Transactions on Pattern Analysis and Machine Intelligence,
Volume PAMI-2, Number 2, pages 165-168, March 1980.
Parameters
- Grid system
Grid system
- Grid system
- Grid
Input Grid
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- Filtered Grid
Output Grid
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- Minimum Standard Deviation
Output Grid
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- Direction of Minimum Standard Deviation
Output Grid
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- Estimated Noise (absolute)
Floating point
- Estimated noise in units of input data
- Estimated Noise (relative)
Floating point
- Estimated noise relative to mean standard deviation
- Weighted
Boolean
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- Method
Choice
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Available choices: noise variance given as absolute value, noise variance given relative to mean standard deviation, original calculation (Ringeler)