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通过高阶主动轮廓和相位领域来塑造建模Shape modelling via higher-order active contours and phase fields |
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| 课程网址: | http://videolectures.net/mcvc08_jermyn_smho/ |
| 主讲教师: | Ian Jermyn |
| 开课单位: | 法国国家计算机研究所 |
| 开课时间: | 2008-02-15 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | For the most part, shape modelling has focused on modelling families of regions consisting of deviations around a given reference shape with a simple topology. There are applications; however, where the family of regions involved does not show such constrained behaviour. Cases where the number of objects is unknown a priori, or where the topology of the region may be otherwise complex (for example network shapes), require new techniques. 'Higher-order active contours' (HOACs) represent one approach to modelling such families of regions. By introducing explicit long-range interactions between region boundary points, HOACs can model families of regions sharing geometric properties without overly constraining region topology. Representing regions by their boundaries is often inconvenient, however, both analytically and numerically, especially for complex topologies. An alternative is the approach known as 'phase field' modelling. The phase field representation and modelling framework offers a number of advantages, both for the simplest region models and for HOACs. By way of illustration, the use of HOAC and HOAC phase field models to estimate the regions corresponding to road networks and tree crowns in satellite and aerial images will be described. |
| 关 键 词: | 拓扑结构; 网络形状; 建模框架; 域模型 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-05-29：吴雨秋(课程编辑志愿者) |
| 阅读次数: | 59 |