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Modified level set method with Canny operator for image noise removal
Authors:Pengcheng Wen  Xiangjun Wang  Hong Wei
Institution:[1]State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China [2]School of Systems Engineering, University of Reading, Whitenights, PO Box 217, Berkshire UK
Abstract:The level set method is commonly used to address image noise removal. Existing studies concentrate mainly on determining the speed function of the evolution equation. Based on the idea of a Canny operator, this letter introduces a new method of controlling the level set evolution, in which the edge strength is taken into account in choosing curvature flows for the speed function and the normal to edge direction is used to orient the diffusion of the moving interface. The addition of an energy term to penalize the irregularity allows for better preservation of local edge information. In contrast with previous Canny-based level set methods that usually adopt a two-stage framework, the proposed algorithm can execute all the above operations in one process during noise removal.
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