计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2010年
9期
2131-2134
,共4页
梯度矢量流场%活动轮廓模型%气球力模型%临界点%哑铃型
梯度矢量流場%活動輪廓模型%氣毬力模型%臨界點%啞鈴型
제도시량류장%활동륜곽모형%기구력모형%림계점%아령형
gradient vector flow%active contour model%balloon model%critical point%dumbbell shape
针对传统活动模型初始化曲线严格的位置选择问题和梯度矢量流场模型存在的哑铃型目标"临界点"问题,提出了梯度矢量流场构造出气球压力的活动轮廓改进模型.利用了梯度矢量流场决定形变点的压力方向,在该构造压力与图像外力及轮廓曲线内力的共同作用下模型完成目标提取.结合实例对改进模型和算法进行了试验分析,结果表明了模型的可行性和算法的有效性.
針對傳統活動模型初始化麯線嚴格的位置選擇問題和梯度矢量流場模型存在的啞鈴型目標"臨界點"問題,提齣瞭梯度矢量流場構造齣氣毬壓力的活動輪廓改進模型.利用瞭梯度矢量流場決定形變點的壓力方嚮,在該構造壓力與圖像外力及輪廓麯線內力的共同作用下模型完成目標提取.結閤實例對改進模型和算法進行瞭試驗分析,結果錶明瞭模型的可行性和算法的有效性.
침대전통활동모형초시화곡선엄격적위치선택문제화제도시량류장모형존재적아령형목표"림계점"문제,제출료제도시량류장구조출기구압력적활동륜곽개진모형.이용료제도시량류장결정형변점적압력방향,재해구조압력여도상외력급륜곽곡선내력적공동작용하모형완성목표제취.결합실례대개진모형화산법진행료시험분석,결과표명료모형적가행성화산법적유효성.
Aimed at the problems of the initial contours in traditional active contour model and so-called critical point problem in the dumbbell shape extraction by gradient vector flow snake(GVF)model,the improve balloon snake model which pressure is constructed by GVF is presented.GVF model is used to construct the pressure direction of balloon snake model.The model with the constructed pressure and external force of image and internal force of the contours is adopted to solve the extraction of dumbbell shape.Experiment demonstrated the feasibility of the improved model and the effectiveness of the algorithm.
