Non-Local Means De-Speckling Based on Multi-Directional Local Plane Inclination Angle

The unavoidable speckle in SAR images seriously interferes with image quality and has a negative effect on subsequent interpretation. existing filters still need to be strengthened terms of both noise suppression edge preservation. Based this, novel non-local means filter by multi-directional local plane inclination angle (MDLPIA) is proposed. proposed uses the MDLPIA reconstruct new weight function for filtering. One instance simulation data four real are used filtering experiments. In experiment, seven other excellent performance selected comparison, six quantitative indicators algorithm evaluation. experimental results show that achieves good visual index evaluation results, equivalent number looks (ENL) at least 22.13 times higher than unfiltered image. effectiveness superiority thus verified.