1. On The Use of Polarimetric Orientation for POLSAR Classification and Decomposition Hiroshi Kimura Gifu University, Japan IGARSS 2011 Vancouver, Canada July 25, 2011

3. Background Ｉ IGARSS 2011, Vancouver, Canada Freeman&Durden decomposition of ALOS PALSAR data (Descend.) Double-bounce , Volume , Surface From map “Isezaki” by The Geospatial Information Authority of Japan (GSI) Agricultural field Built-up Area Objective: To discriminate built-up and non-built-up areas

6. Ｉ IGARSS 2011, Vancouver, Canada In case of SMALL threshold  c  (OR) ASCENDING DESCENDING DETECTABLE zone of built-up areas  • NO undetectable zone of built-up area • COMMISSION error (Non-built-up areas are assigned to built-up areas) increases. • OMSSION error (Built-up areas are assigned to non-built-up areas) decreases. UNDETECTABLE DETECTABLE

7. Ｉ IGARSS 2011, Vancouver, Canada In case of LARGE threshold  c  (OR) ASCENDING DESCENDING DETECTABLE zone of built-up areas  UNDETECTABLE zone • Undetectable zone of built-up area exists. • COMMISSION error (Non-built-up areas are assigned to built-up areas) decreases. • OMSSION error (Built-up areas are assigned to non-built-up areas) increases. UNDETECTABLE DETECTABLE

8. ALOS PALSAR Experiment: PALSAR Scenes Ｉ IGARSS 2011, Vancouver, Canada The Atsugi area: about 50 km south-west from Tokyo Radar illumination azimuth: 99  (Ascending) 261  (Descending) Expected  c is 9  (No undetectable zone and the max.  c ), then the PO angle threshold c will be 10  .

9. ALOS PALSAR Experiment: Images Ｉ IGARSS 2011, Vancouver, Canada Pauli color code Freeman&Durden decomposition PO angle |HH-VV| , |HV| , |HH+VV| Double-bounce , Volume , Surface 

10. Study Area ( 5.2km by 3.1 km ) Ｉ IGARSS 2011, Vancouver, Canada B3 F3 B2 B1 F2 F1 Google Earth image Map by GSI, Japan B3 F3 B2 B1 F2 F1 © Google Earth

11. Freeman&Durden Decomposition Ｉ IGARSS 2011, Vancouver, Canada Google Earth image Ascending Descending B3 F3 B2 B1 F2 F1 Double-bounce Volume Surface © Google Earth

12. H-Alpha Segmentation Ｉ IGARSS 2011, Vancouver, Canada Google Earth image Ascending Descending © Google Earth B3 F3 B2 B1 F2 F1 H 

13. PO Angle Images Ｉ IGARSS 2011, Vancouver, Canada  Google Earth image Ascending Descending © Google Earth B3 F3 B2 B1 F2 F1

14. Discrimination Results Ｉ IGARSS 2011, Vancouver, Canada c =5  (  c =5  ) c =10  (  c =9  ) c =12  (  c =11  ) White: Built-up area, Black: Non-built-up area B3 F3 B2 B1 F2 F1

15. Discrimination Results (Built-up areas) Ｉ IGARSS 2011, Vancouver, Canada © Google Earth © Google Earth © Google Earth B1 B2 B3 White: Built-up area Black: Non-built-up area Google Earth image c =5  (  c =5  ) c =10  (  c =9  ) c =12  (  c =11  ) Omission errors

16. Discrimination Results (Non-built-up areas) Ｉ IGARSS 2011, Vancouver, Canada © Google Earth © Google Earth © Google Earth F1 F2 F3 Commission errors White: Built-up area Black: Non-built-up area Google Earth image c =5  (  c =5  ) c =10  (  c =9  ) c =12  (  c =11  )

17. Discrimination Results Ｉ IGARSS 2011, Vancouver, Canada Freeman&Durden decomposition of ALOS PALSAR data ( Descend. ) Double-bounce , Volume , Surface Built-up Areas (white) and non-built-up areas (black) by c =10  (  c =9  ). Agricultural field Built-up Area

18. Discrimination Results Ｉ IGARSS 2011, Vancouver, Canada Freeman&Durden decomposition of ALOS PALSAR data ( Ascend. ) Double-bounce , Volume , Surface Built-up Areas (white) and non-built-up areas (black) by c =10  (  c =9  ). Agricultural field Built-up Area

20. Rotation of Coherence Matrix (Yamaguchi) Ｉ IGARSS 2011, Vancouver, Canada BEFORE Rotation AFTER Rotation Agricultural fields Built-up Areas |HH-VV| |HV| |HH+VV| Ascending Descending |HH-VV| |HV| |HH+VV| Ascending Descending

21. PO Angle Shifts of Slopes Ｉ IGARSS 2011, Vancouver, Canada Range Slope Angle (degrees)