点击次数：

论文类型：会议论文

发表时间：2008-01-01

收录刊物：CPCI-S

页面范围：5937-5940

关键字：Edge Detection; Neighborhood Limited Empirical Mode Decomposition (NLEMD); Intrinsic Mode Functions(IMF)

摘要：One novel edge detection algorithm based on neighborhood limited empirical mode decomposition (NLEMD) and its time-frequency analysis is proposed. Firstly, the image is decomposed by NLEMD, then bi-orthant Hilbert transform is applied in IMF's and instantaneous frequency with instantaneous energy are extracted. Secondly, the IMF's and instantaneous frequency with instantaneous energy are fused under certain principle to obtain fused image. Thirdly, using local adaptive threshold to extract edges. One can obtain different edges for multi-resolution, and experiments proved the validity of the new algorithm in this paper.