To author ' s knowledge , it can remedy the fact that the bezier - shaped displacement reference curves are laid in local hulls in one hand , so that the deformation region can be further and larger ; on other hand , it makes the computation and quality more robust and better 这一方面弥补了受b zier曲线在一个局部凸包内的约束，使得网格顶点可变形的范围更大，另一方面使得计算更稳定、变形后的曲面质量更好。
Experiments show that the efficient motion estimation algorithm proposed can further reduce block matching distortion computations relative to conventional fast motion estimation algorithms with neglectable coding efficiency loss ( within 0 . 1db ) 提出一种基于节点模型的可变形块匹配运动估计算法来搜索最佳运动矢量。实验表明,在编码性能损失很小的条件下,可以使得运动搜索块匹配的运算量在通常快速运动搜索算法的基础上下降61 % 。
A deformational particle with oil - soluable property is used as a bridge plug to build a shielding layer in the oil - gas reservior channel , to prevent the pollution caused by drilling mud entering the reservior due to the pressure difference , and so to protect the oil - gas reservior 摘要用一种具有油溶性质的可变形粒子做桥塞物，在油气储层通道中建立桥堵屏蔽层，防止由于压差造成钻井泥浆进入储层而形成污染，从而起到保护油气储层的作用。
The stochastic disturbance is brought to the deformable models and the simulated annealing is introduced to the iteration process . a new algorithm named sa snake ( simulated annealing snake ) is proposed . the algorithm has the ability to search globally 为了解决这个问题，我们在可变形模型中加入随机扰动因素，考虑在迭代过程引入模拟退火的思想，提出了一种称之为基于模拟退火的可变形模型sasnake ( simulatedannealingsnake )的新算法，算法具有全局搜索能力。
The proposed algorithm is called agvf snake algorithm . when deformable models are used to extract brain contour from the head mr images , problems associated with initialization and time consuming iteration limit their utility . to overcome these problems , a region based variable expansion force is proposed 对于可变形模型对初始轮廓的依赖较大，外力的作用范围有限，迭代算法收敛时间较长等问题，提出了一种新的外力，我们称之为基于区域的可变膨胀力( regionbasedvariableexpansionforce ) 。
The main work and conclusion in this dissertation are as follows : the research , development and application of deformable active contour model is reviewed from geometry representation , scale - spaces and optimization method ; the physical essence and the idiographic calculating process of the classical deformable active contour model are also discussed ; and the existing problems and possible future research orientations are presented 其主要工作和所得到的结论如下： ( 1 )从几何模型、尺度空间、算法实现等三个方面对可变形活动轮廓模型的理论研究与发展进行了综述；对经典的可变形活动轮廓模型的物理本质和具体求解过程进行了探讨；指出了经典可变形活动轮廓模型理论上存在的问题及进一步研究的方向。
In this dissertation , after making a short review of the state - of - the - art of studies on the topics , the author present the study results , which include the following contents : ( 1 ) after simply reviewing the research results of two - dimensional wave propagation in the non - deformable porous media , a series of studies on wave propagation in the deformable porous saturated soil layers are made 本论文就这些问题做了一些研究工作，内容如下： ( 1 )简要回顾了在不变形介质的前提下二维地下水的波动问题的研究成果。然后在可变形介质的前提下，直接从两相介质动力方程出发，对含水土层中的波动问题进行了研究。
The scale - spaces of deformable active contour model has been improved , and a new model based on the ms - mr is presented , which can avoid the local minimum effectively and enforce the capture ability of the deformed active contour model . the convergence speed also has been increased because of few control points . a b - spline deformed active contour model based on dp algorithm is presented ( 2 )对活动轮廓模型的尺度空间进行了改进，提出了基于多尺度和多分辨率的可变形活动轮廓模型，该模型能有效的防止变形活动轮廓模型收敛于局部极小值，并且提高了变形活动轮廓模型的捕捉能力，由于低分辨率时所需控制点少所以收敛速度快。
Therefore , the research of image manipulation based on the deformable active models is important signification of theory and application . in this dissertation , based on the systematically analysis of theory and application research on the deformable active models , a new b - spline deformable active models based on the dp approaches is proposed , and then it is applied to the human face detection and 3d reconstruction based on layer data 本文选题于国家自然科学基金资助项目“由一般光照条件下的图像生成实体形态的理论与方法研究” (编号： 59975057 ) ，系统的分析了国内外关于可变形模型理论与应用研究的基础上，提出了一种基于动态规划法的b样条主动轮廓模型，作为应用例之一，利用它进行人脸图像的处理和提取断层图像数据建立三维模型。
Reverse engineering is used widely in the field of science study , technology , biomedicine etc , and is used for settling the problem of geometric size measurement , transmogrification measurement , scathe measurement , surveilling the quality of manufacture , profile modeling , cad / cam , and physic diagnosis etc . in these techniques , the deformable active model is a hot point research 反求工程技术广泛应用于科学研究、工程技术与生物医学等领域，以解决或辅助解决几何尺寸度量、变形测量、振型测试、损伤测定、产品质量监控、实物仿形、 cad cam以及医学诊断等诸多问题。在用于轮廓提取的技术中，可变形活动轮廓是目前国内外研究的热点。
