[1] Giuseppe Papari,Nicolai Petkov. Edge and line oriented contour detection: State of the art[J]. Image and Vision Computing,2011,29(2-3): 79-103.

[2] Yonghyun Kim,Changno Lee,Dongyeob Han,et al. Improved additive-wavelet image fusion[J]. IEEE Geoscience and Remote Sensing Letters,2011,8(2): 263-267.

[5] Arturo Aquino,Manuel Emilio Gegúndez-Arias,Diego Marín. Detecting the optic disc boundary in digital fundus images using morphological,edge detection,and feature extraction techniques[J]. IEEE Transactions on Medical Imaging,2010,29(11): 1860-1869.

[6] Li Bing,Zhang Peilin,Wang Zhengjun,et al. A weighted multi-scale morphological gradient filter for rolling element bearing fault detection[J]. ISA Transactions,2011,50(4): 599-608.