Understanding scenes

Abstract

Declarative modelling allows the designer to describe a scene, without the need to define the geometric properties, by specifying its properties which can be imprecise and incomplete. Declarative modelling by hierarchical decomposition is a special approach which gives the user the ability to describe a scene by top-down decomposition at different levels of detail, generates a set of geometric solutions that meet the description and visualizes the scenes. The aim of the present work is to settle the reverse engineering process and by exploiting knowledge couples a declarative with a traditional geometric modeller. The declarative conception cycle of declarative modelling is extended, in order to include the reverse engineering process, by introducing the reconstruction phase and the iterative design process becomes automated. The reconstruction phase receives a set of selected scenes, which are semantically understood, permits the designer to perform geometric and topological modifications on the scene(s) and results an abstract description which embodies the designer modifications and leads to more promising solutions, reducing the initial solution space. © 2009 Springer-Verlag Berlin Heidelberg.