Abstract: A new edge detection algorithm based on improved mathematics morphologic method is proposed．By using erosion and dilation basic operators,the structure elements suitable for the image edge detection are chosen,then use Canny edge detector to extraction edge．The improved mathematics morphologic method is helpful to reveal distinct characteristics for some edge features,efficiently with high speed processing．Compared with the classical edge detection operators and traditional mathematics morphology edge detection algorithm,the improved algorithm is more advantage,the quality and speed of the picture edge extraction significantly improved.

Key words: Mathematics morphologic method ,Multiple structuring elements,Edge extraction