Polarization signature analysis of paddy rice in southern china
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Presented in “China – Thailand Geo-Informatics Workshop Series I: Agricultural Applications” 30 June - 2 July 2010 at Pattaya, Thailand
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Polarization signature analysis of paddy rice in southern china
- 6. Hybrid rice Japonica rice
- 7. RADARSAT-2 Acquisitions (supported by SOAR Program) Acquisition time Beam Mode Incidence angle (degrees) Resolution (m) Range Azimuth July 26,2009 FQ 40.34 12m 8m August 19,2009 FQ 40.34 12m 8m September 12, 2009 FQ 40.34 12m 8m October 6,2009 FQ 40.34 12m 8m
- 8. Rice fields Rice fields
- 9. Linear Polarization Combination HH – HV space: good combination of polarizations
- 11. HH and HH/HV Color Composite Image (R:HH G:VH B:HH/HV) Rice=purple magenta=building1 yellow=buiding2 green=forest
- 13. Pauli Decomposition Color composite image red=a scattering mechanism characterized by double- or even-bounce green= those scatters which are able to return the orthogonal polarization, from which, one of the best examples is the volume scattering produced by the forest canopy. blue =power scattered by targets characterized by single- or odd-bounce. Rice fields Rice fields
- 14. Polarimetric signature of four major targets rice forest urban water
- 15. H-Alpha space of four major targets forest water rice urban
- 16. Entropy, Anisotropy and combinations Entropy H Anisotropy A HA H(1-A)
- 17. Color composite image highlighting rice （ R :HA ， G:Pauli-G ， B: Pauli-B ） Rice=red magenta=building1 yellow=buiding2 green=forest
- 19. Color composite image highlighting rice （ R : ， G:Pauli-G ， B: Pauli-B ） Rice=red magenta =building1 yellow=buiding2 green=forest water=black
- 20. Temporal Polarization signature of rice July 26th,2009 Aug 19th,2009 Sep 12th,2009 Oct 6th,2009
- 21. Temporal H-Alpha space of rice July 26th, 2009 Aug 19th, 2009 Sep 12th, 2009 Oct 6th, 2009
- 23. Airborne SAR data acquisitions Acquisition time Incidence angle (degrees) Resolution (meter) Polarization Range Azimuth February 21th,2009 44.0—50.9 2 2 HH/HV/VH/VV February 27th,2009 33.0—44.0 2 2 HH/HV/VH/VV February 28th,2009 33.9—44.8 2 2 HH/HV/VH/VV March 9th,2009 54.0—65.5 2 2 HH/HV/VH/VV March 9th,2009 50.5—63.4 2 2 HH/HV/VH/VV March 9th,2009 48.3—62.0 2 2 HH/HV/VH/VV March 9th,2009 47.5—66.8 2 2 HH/HV/VH/VV March 10th,2009 47.5—66.8 2 2 HH/HV/VH/VV
- 24. Color composite image （ R:HH G:HV B:VV ）
- 25. Rice on different polarization images HH VH HV VV rice
- 27. Rice in different growth stages <HH> / <VV> of rice increases with rice growth distinguish rice in different growing stages
- 28. rice1=60 days rice2= 40 days rice3=30 days rice4=20 days The accuracy of rice extraction is 90%, and the precision of classification is 71%.
- 30. Thanks ! Chou Xie Institute of Remote Sensing Applications, Chinese Academy of Sciences Tel:86-10-64876313 Email:xiechou@irsa.ac.cn