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Modeling 3D Deformable Object with the Active Pyramid

机译:使用主动金字塔建模3D可变形对象

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Medical imaging is a powerful mean to access dynamic function of 3D deformable organs of the body. Due to the flow of incoming data, multiresolution methods on parallel computers is the only way to achieve complex processings in reasonable time. We present an active pyramid to model dynamic volumes. This pyramid is built on the first volume of a sequence and contains a binary model of the objects of interest. Previous knowledge is introduced within this binary model. The structure of the pyramid is rigid, but its main interest is that its components are deformed to fit the data using energetical constraints. A multiresolution algorithm based on self-organizing maps is then applied to deform the model through time. This algorithm matches the different levels of the pyramid in a coarse to fine approach. The output of the matching process is the field of deformation, modeling the transformations. This pyramid is applied to real data in the result section. The rigid structure of the pyramid is suitable for massively parallel architectures.
机译:医学成像是访问人体3D变形器官动态功能的有力手段。由于传入数据的流动,并行计算机上的多分辨率方法是在合理的时间内完成复杂处理的唯一方法。我们提出了一个主动金字塔来模拟动态体积。该金字塔建立在序列的第一卷上,并包含感兴趣对象的二进制模型。在此二进制模型中引入了先前的知识。金字塔的结构是刚性的,但它的主要作用是使用能量约束将其组件变形以适合数据。然后应用基于自组织图的多分辨率算法来使模型随时间变形。该算法以粗糙到精细的方式匹配金字塔的不同级别。匹配过程的输出是变形场,对转换进行建模。该金字塔将应用于结果部分中的实际数据。金字塔的刚性结构适用于大规模并行架构。

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