Lip Contour Extracting Based on Improved Snake Model
Qiu Hai-feng · Computer Technology and Development · 2008
In order to improve the effectiveness of snake active model to extract the object contour in color images,introduce an improved snake algorithm.First,develop a new approach to generate an initial contour automatically;then a new external force is redesigned basing on the GVF-snake.Use the colorbased clustering algorithm to divide the image.Then use the distance between the pixels and the clustering center to enhance the image and use the difference to get the edge grads of interest.In addition,normalize the GVF field and improve the smooth factor.Comparing the snake model prototype with the new method,it indicates that the improvement is considerable,especially when color images are involved.