一种改进的图像边缘检测算法-地球科学与环境学报-长安大学.pdfVIP

303 Vol.30No .3 2 0 0 8 9 　Journal of Earth Sciences and Environment 　 Sept.2 0 0 8 1 2 2 1 崔建军,詹世富, 郑雄伟 , 顾俊凯 (1. , 710054;2., 100083) :, , 。 , , , , , 。 , 。 :, 。 :;;; :P23　:A 　:1672-6561(2008)03-0323-03 An Improved Edge Detection Algorithm 1 2 2 1 CUI Jian-jun , ZHAN Shi-fu , ZHEN Xiong-wei , U Jun-kai (1.S chool of Geol og i cal E ng i neer ing an d S urv ey ing , Chan g an Univ ersi ty , X i an 710054, S haan x i, China; 2.China A ero Geop hy si cal S ur vey and R emot e Sensing Center f or L and and R esources , B eij i ng 100083, China ) Abstract:The defects of conventional gradient edge detection are analyzed and evaluated.In order to avoid the defects of gradient operators, this paper proposes a new edge detection method.The new algorithm alters the traditional method of considering one pixel separately by considering the neighborhood of one image pixel as a whole part.Some special parameters of the area can be presented through calculating the pixel and its neighborhood.The edge detection is based on those parameters.The new algorithm thoroughly considers the neighborhood of one image pixel and improves the stability of the gradient results by introducing the value of the neighborhood to the gradient.The edge detection results of test image show that the new method can detect thinner edges and is more reliable under salt and pepper noisy condition. Key words:edge detection;differential operator;algorithm;improving , Robert、Sobel、Haralick 0　 , Marr[ 1-2] , , 。 , ,