Identifying Forest Change with SAR

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Presentation transcript:

Identifying Forest Change with SAR March 2010 Martin Whittle Shaun Quegan University of Sheffield

Landsat vs. SAR SAR does not suffer from cloud problems Deforestation 2006/09/03 Landsat5 2008/06/20 ALOS PALSAR The Landsat image above was the best available from the time and emphasises the difficulty of using optical Imagery to develop accurate databases. HH HV HH/HV SAR does not suffer from cloud problems

Temporal ScanSAR image of Kampar region Jan 2007 Sept 2007 June 2008 Each HH image has been de-noised by multi-channel filtering. Pixel size: 100 X 100 m Image size: 128 X 91.8 Km

Detections compared with database deforestation TP – True positive (correct detection) FP – False positive (false alarm) FN – False negative – missed detection