Direct non-photorealistic renderings of procedural geometry

该项目的重点是调查和评估在复杂对象（景观，城市结构）的程序生成方法和非真实感渲染（NPR）方法之间建立直接联系的方法，该方法自动创建这些对象的抽象渲染，例如绘画外观。传统上，为了产生这样的抽象再现，对象首先被真实感地再现，然后在第二步骤中被转换成抽象的、非真实感的表示。程序生成和抽象绘制方法的结合使我们能够实现的方法，这是能够获得所需的额外信息，而不依赖于真实感的中间图像直接从场景。通过创建直接链接，可以使用不仅提高所得到的非真实感表示的质量，而且还包括对象特定或上下文相关信息（空间深度、对象权重和类型）的信息。使用三个侧重于复杂城市模型、城市空间和自然的模型场景，对这种组合进行了示例性研究。将实施不同的抽象算法，并测试不同的程序生成方法是否适合直接表示。例如，必须确保几何抽象在程序生成中具有足够的对应性。

The focus of the project is the investigation and evaluation of methods for creating a direct linkage between procedural generation methods for complex objects (landscapes, urban structures) and non-photorealistic rendering (NPR) methods, which automatically creates abstract renditions of these objects in, e.g. a painterly look. Traditionally, for producing such abstract renditions objects are first rendered photorealistically and then converted into abstract, non-photorealistic representations in a second step. The combination of procedural generation and abstract rendering methods allows us to achieve methods, which are able to obtain required additional information directly from a scene without being dependent on a photorealistic intermediate image. By creating a direct link, information can be used that improves not only the quality of the resulting non-photorealistic representations, but includes also object-specific or context-related information (spatial depth, object weight and type). Using three model scenarios that focus on complex city models, urban spaces and nature, this combination is exemplarily investigated. Different abstraction algorithms will be implemented and different procedural generation methods will be tested for their suitability for a direct representation. For example, it must be ensured that the geometrical abstraction has an adequate correspondence in the procedural generation.