Interactive implicit modelling

交互式隐式建模

• 批准号: 5544-2011
• 负责人: Wyvill, Brian
• 金额: $ 2.4万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568407
• 关键词: Interactive; implicit; modelling

The research focus is on new methods for building computer models for application in computer assisted surgery, medical education, animation, and electronic games. A modelling methodology known as implicit modelling, describes a model as an iso-surface in a scalar field. This is similar to the idea of a set of contours in a height field. The collection of contours describes a surface. Solid models can be produced that exhibit several advantages over the more usual method that use triangle meshes. Implicit models are solid, it is easy to tell inside from outside and find for example contact between models of a human organ and a virtual knife. These models are very useful for describing both manufactured objects that have sharp edges and more organic objects. Using results of our earlier research it is possible to describe very complex models with very little data, enabling transmission over a network, thus making such models useful in cooperative situations where users are geographically far apart. For example virtual surgery. Earlier work allowed rapid prototyping of complex (topologically and geometrically) models from user sketches and we are still finding better methods of producing highly complex models from simple input. There are currently several disadvantages that prevent wide acceptance of implicit modelling. it is difficult to generate implicit models from scan data, and visualization is slow compared to mesh based methods. Research is required to explore new field functions that allow for better control over the shape of the model particularly during animation. In this work the intention is to investigate methods to overcome these problems to make implicit modelling a useful method in the application areas indicated.

研究的重点是建立计算机模型的新方法，用于计算机辅助 外科手术、医学教育、动画和电子游戏。 被称为隐式建模的建模方法将模型描述为标量场中的等值面。这类似于高度场中的一组等高线的概念。 等高线集合描述曲面。与使用三角形网格的更常见的方法相比，可以产生具有几个优点的实体模型。隐式模型是实体的，很容易区分内部和外部，并找到例如人体器官模型和虚拟刀之间的联系。这些模型对于描述具有尖锐边缘的制造对象和更有机的对象都非常有用。 使用我们早期的研究结果，可以用很少的数据来描述非常复杂的模型，使其能够在网络上传输，从而使这些模型在用户地理位置相距甚远的合作情况下非常有用。比如虚拟手术。早期的工作允许从用户草图快速原型化复杂的（拓扑和几何）模型，我们仍然在寻找更好的方法，从简单的输入产生高度复杂的模型。 目前有几个缺点，防止广泛接受隐式建模。从扫描数据生成隐式模型是困难的，并且与基于网格的方法相比，可视化是缓慢的。需要研究探索新的场函数，以便更好地控制模型的形状，特别是在动画期间。在这项工作中，目的是调查的方法，以克服这些问题，使隐式建模的应用领域表示一个有用的方法。