Aiming to detect interesting targets in polarimetric SAR imagery

the problem of target contrast enhancement is studied in this paper

and a novel scheme based on the strategy of sample selection is proposed for heterogeneous areas having complex polarimetric properties.Firstly

a preliminary sample selection is achieved by treating two categories of pixels with different scattering mechanisms as sample pixels of target and clutter.Secondly

a further selection is complemented by a test statistic of wishart distribution

which treats pixels with similar polarimetric statistics as the final qualified samples.The novel scheme can enhance the performance merely acquired merely by the rough selection of pixel samples with manual intervention

and its validity is indicated by experimental results with E-SAR polarimetric SAR data sets.