This paper adopts an improved algorithm of GVF Snake. First, it extracts original contour by man-made sampling and the method of B spline drafting, then, recycles improved GVF Snake for approach of edge contour, obtaining relatively precise edge counter of blade image. It conquers the error of tradition Snake which catches area small, and conforms to this algorithm effectively.
采用一种改进的GVF Snake算法，首先通过人工取点，B样条拟合的方法，提取其初始轮廓，再利用改进的GVF Snake方法进行边界轮廓逼近，以获得比较精确的叶片边界轮廓，克服了传统活动轮廓模型梯度势能场捕捉范围小的缺点，并通过实验证明了该方法的有效性。