It is a non local filter. Using it , the SAR images can be approximated to optical one

PretestFilter
.............\AIm.eps
.............\awt.eps
.............\cj.eps
.............\cy.eps
.............\distributionOfLnH.eps
.............\edge_Box.eps
.............\edge_Lee.eps
.............\edge_ori.eps
.............\edge_pretest.eps
.............\homo_1_ori.eps
.............\homo_1_ori_arrow.eps
.............\homo_1_patch.eps
.............\homo_1_sel.eps
.............\homo_2_ori.eps
.............\homo_2_ori_arrow.eps
.............\homo_2_patch.eps
.............\homo_2_sel.eps
.............\homo_3_ori.eps
.............\homo_3_ori_arrow.eps
.............\homo_3_sel.eps
.............\homo_4_ori.eps
.............\homo_4_ori_arrow.eps
.............\homo_4_patch.eps
.............\homo_4_sel.eps
.............\H_alpha_Box.eps
.............\H_alpha_Lee.eps
.............\H_alpha_NL.eps
.............\H_alpha_ori.eps
.............\H_alpha_scene_BOX.eps
.............\H_alpha_scene_Lee.eps
.............\H_alpha_scene_NL.eps
.............\H_alpha_scene_ori_1.eps
.............\IEEEtran.cls
.............\Ottowa_lop.eps
.............\Ottowa_NL.eps
.............\Ottowa_ori.eps
.............\patch.eps
.............\PretestFilter.aux
.............\PretestFilter.dvi
.............\PretestFilter.log
.............\PretestFilter.tex
.............\PretestFilter.tex.bak
.............\SanF_box.eps
.............\SanF_Lee.eps
.............\SanF_NL.eps
.............\SanF_ori.eps
.............\simu_BOX.eps
.............\simu_Pretest.eps
.............\simu_Speckles.eps
.............\simu_Unblurred.eps
.............\wrt_3.eps
.............\wrt_5.eps
.............\wrt_7.eps
.............\wrt_9.eps
.............\yilun.eps
.............\yj.eps

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