A New Multiscale Edge Detection Technique
CM Han, HD Guo, CL Wang, QL Tan · 2002
An effective algorithm of multiscale technique for detecting edges in synthetic aperture radar (SAR) images is presented utilizing the empirical mode decomposition (EMD) in this paper. Since EMD is one dimensional data processing method, EMD is employed to an image in two directions: horizontal (0degrees), vertical (90degrees) respectively, to obtain two directional smoothed images at different scales. In this way, different scales image data were obtained. In order to obtain edge points of single pixel width, the grad of different scales image is computed. Edge map is extracted from different scales image based on space uniform condition. Application of this method to SAR images has shown that the effectiveness of the method is quite satisfactory.