本文研究了典型的基于區域的圖像分割方法主動形狀模型（Active Shape Model, ASM）和基于邊緣的圖像分割snake 算法，分析了算法適用條件和各自的優缺點。結合snake 模型與主動形狀模型，提出了一種基于多級混合模型的圖像分割方法：首先使用ASM，獲得的對目標圖像位置和形態的最佳估計，并通過snake 算法對匹配的結果進行二次調整，獲取可以精確描述圖像邊緣信息的模型。試驗表明了該方法的有效性。
關鍵字：主動形狀模型；蛇模型；圖像分割

Abstract: Based on the analysis of Active Shape Model(ASM)and snake algorithm ,which gives us the application conditions and the advantages and disadvantages, A multistage hybrid matching method by integrating statistical model and snake is presented for image segmentation. A statistical model can locate objects rapidly, then a snake by adding an additional terms for the target object is built in order to consider the smoothness of the target contour.The method is well suited for automatic image segmentation.
Keywords: Active Shape Model; snake algorithm; image segmentation