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《Journal of Geomatics》 2006-05
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A NOVEL METHOD OF THRESHOLD DETERMINATION OF WAVELETS COEFFICIENTS FOR ISO-CONTOUR GENERALIZATION

LI Chenzhao~(1,2) SHU Hong~(1)(1 State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China;2 78155 Army PLA,16 West Shuxin Road,Chengdu 610036,China)  
The ideas of wavelets for iso-contour generalization are presented.In the setting of map generalization,a novel method of threshold determination of wavelets coefficients for iso-contour generalization is given.The wavelets coefficients are thresholded with the extended square root of the original and target map scales ratio.Further,a three-level classification of wavelets coefficients with respect to the importance of iso-contours is made.
【Fund】: 教育部高等学校博士点专项科研基金资助项目(20040486029);; 测绘遥感信息工程国家重点实验室开放基金资助项目;; 国家“973计划”资助项目(对地观测-空间信息-地学知识转化机理)
【CateGory Index】: P283
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