基于实例和约束的三维场景概念设计和系统实现

A System for Case-and Constraint-based Conceptual Design Method for 3D Scenes

3D场景设计是VR建模中最重要也最耗人力的工作之一,如何解决该问题是一项重要的课题。本文提出一种新的基于实例和约束的三维场景概念设计方法。首先,根据所获取的场景实例中所蕴涵的不同层次的语义信息,对其进行场景元素过滤和场景语义标注,并由此构建三维场景实例库。相应地,对场景中可能出现的元素类别进行分类和语义标注,并建立场景元素库。接着,应用基于实例的方法,并结合场景设计过程中所涉及到的知识(约束),给出三维场景概念设计的一般方法;最后以一个实例对该方法做进一步的说明。研究表明,该方法符合人们对场景设计的一般过程。此外,由于场景实例和场景元素具有丰富的语义信息,使得所生成的场景除了常规的可视效果,还可以直接应用于虚拟现实环境以及三维动画等数字内容制作中。

3D scene design is one of the most important yet labor-intensive tasks in virtual world modeling. This paper proposes a new case and constraint-based method of conceptual 3D scene design. First, we construct a 3D scene case based by filtrating and marking the scene through several levels of semantic information, and construct a SD scene element base by classifying and marking pre-modeled scene elements. And then, we present a conceptual design method for 3D scenes in which scene constraints are incorporated. Finally, we illustrate this method through an example. As experiments indicate, our method accords with the human scene design process. Furthermore, scenes which are generate could be used in the virtual reality environment and the figure content such as 3D animation because of the plenty of semantic information which is included in scene cases and scene element cases.