Semi-Implicit AOS Schemes for MRI Segmentation Geodesic Active Contour Model
Li Gang · Nanjing Qixiang Xueyuan xuebao · 2005
The geodesic active contour model has been wide used in image segmentation for its computational stability.Most implicit active contour models,however,are based on explicit updating schemes and therefore of limited computational efficiency.To alleviate the problem,this paper presents a fast active contour model based on the additive operator splitting(AOS) algorithm.In the new model,the time step can be set large to improve the model’s time efficiency.During constructing the coefficient matrix,regional information is used to reduce the effect of noises.The results show that the new model can get better results in an efficient way.