A Novel Scheme of Target Contrast Enhancement in POL-SAR Imagery Based on Sample Selection Strategy
一种基于样本筛选的极化SAR图像目标对比增强新方法

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.