Model-based pseudo-quad-pol reconstruction from compact polarimetry and its application to oil-spill observation

Compact polarimetry is an effective imaging mode for wide area observation,especially for the open ocean. in this study,we propose a new method for pseudo-quad-polarization reconstruction from compact polarimetry based on the three-component decomposition. by using the decomposed powers,the reconstruction model is established as a power-weighted model. further,the phase of the copolarized correlation is taken into consideration. the phase of double-bounce scattering is closer to π than to 0,while the phase of surface scattering is closer to 0 than to π. by considering the negative (double-bounce reflection) and positive (surface reflection) copolarized correlation,the reconstruction model for full polarimetry has a good consistency with the real polarimetric sar data. l -band alos/palsar-1 fully polarimetric data acquired on august 27,2006,over an oil-spill area are used for demonstration. reconstruction performance is evaluated with a set of typical polarimetric oil-spill indicators. quantitative comparison is given. results show that the proposed model-based method is of great potential for oil-spill observation. © 2015 junjun yin et al.