کشف لبه تصویر دیجیتال مبتنی بر منطق فازی

Abstract -In this paper fuzzy based edge detection algorithm is  developed. In the proposed algorithm, edginess at each pixel of  a digital image is calculated using three (3)  ۳۳ linear spatial filters  i.e.  low-pass,  high-pass  and edge  enhancement  (Sobel)  filters  through  spatial  convolution  process.  Edge strength  values  derived  from  the  three masks  form three set  of  edges,  utilized  as  fuzzy system inputs.  Based on  the  Gaussian  membership functions and fuzzy rules the fuzzy system decide  whether  a  pixel  in  focus belong  to  an  edge  or  non-edge. The  final  pixel  classification  of  a  given  image  is  produced  by  generating  output  pixel  value  using  Mamdani  defuzzifier  method. The robustness of  the  proposed  method results  for  different captured images are compared to those obtained with  Sobel and Prewitt  operators.  Experimental results  show the  ability and high performance of proposed algorithm.  Keywords-  Fuzzy  Logic,  Fuzzy  inference  system,  Edge  strength, Edge detection

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