Huang Xiaolei, Metaxas Dimitris N
Computer Science and Engineering Department, Lehigh University, Berthlehem, PA 18015, USA.
IEEE Trans Pattern Anal Mach Intell. 2008 Aug;30(8):1444-59. doi: 10.1109/TPAMI.2007.70795.
This paper presents a new deformable modeling strategy aimed at integrating shape and appearance in a unified space. If we think traditional deformable models as active contours or evolving curve fronts, the new deformable shape and appearance models we propose are deforming disks or volumes. Each model has not only boundary shape but also interior appearance. The model shape is implicitly embedded in a higher dimensional space of distance transforms, thus represented by a distance map image. In this way, both shape and appearance of the model are defined in the pixel space. A common deformation scheme, the Free Form Deformations (FFD), parameterizes warping deformations of the volumetric space in which the model is embedded in, hence deforming both model boundary and interior simultaneously.
本文提出了一种新的可变形建模策略，旨在将形状和外观整合到一个统一的空间中。如果我们将传统的可变形模型视为活动轮廓或演化曲线前沿，那么我们提出的新的可变形形状和外观模型就是变形圆盘或体积。每个模型不仅具有边界形状，还具有内部外观。模型形状隐含地嵌入在距离变换的高维空间中，因此由距离图图像表示。通过这种方式，模型的形状和外观都在像素空间中定义。一种常见的变形方案，即自由形式变形（FFD），对模型所嵌入的体积空间的扭曲变形进行参数化，从而同时使模型边界和内部变形。
