Wenke Wang

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The best result of image processing is depends on the fundamental steps, that is, to point out the true edges. Hence, it is very important to choose the edge detector, which fit best to the processing. This paper is a first step for analysing the rings in the tree ring image. In this paper we compare the various edge detection techniques towards the tree(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t In this study, the authors develop a hybrid Laplace transform finite(More)
The hydraulic relationship between the stream and aquifer can be altered from hydraulic connection to disconnection when the pumping rate exceeds the maximum seepage flux of the streambed. This study proposes to quantitatively analyze the physical processes of stream-aquifer systems from connection to disconnection. A free water table equation is adopted to(More)
B-spline surface skinning is widely used in geometric modeling. However, the traditional method may introduce wiggles in the final surface when the sectional curves are non-parallel. An algorithm for skinning non-parallel sectional curves is proposed in this paper to avoid wiggles. Firstly, the input curves are divided into multiple groups automatically,(More)
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