Automatic creation of boundary-representation models from single line drawings

摘要: This thesis presents methods for the automatic creation of boundary-representation models polyhedral objects from single line drawings depicting objects. topic is important in that automated interpretation freehand sketches would remove a bottleneck current engineering design methods. The does not consider conversion to or which require manual intervention multiple drawings. The contains number novel contributions art machine Line labelling has been extended by cataloguing possible tetrahedral junctions and development heuristics aimed at selecting preferred many possible. ”bundling” method grouping probably-parallel lines, use feature detection detect classify hole loops, are both believed be original. junction-line-pair formalisation translates problem depth estimation into system linear equations new. Treating topological reconstruction as tree-search only new approach but tackles fully investigated previous work.