College of Electrical Science and Engineering, National University of Defense Technology, Changsha 410073, China
Abstract:
This letter presents an image orientation estimation method which is based on a combination of two techniques: quadrature filtering and nonlinear diffusion. The quadrature filters are used to get the orienta-tion tensors for edges, then the orientation tensors are smoothed through nonlinear diffusion. Experimental re-sults and analysis show the robustness of the proposed method.