Interpreting line drawings as three-dimensional surfaces

摘要: Understanding how line drawings convey tri-dimensionality is of fundamental importance in explaining surface perception when photometry either uninformative or too complex to model analytically. We put forward here a computational for interpreting as three-dimensional surfaces, based on constraints local orientation along extremal and discontinuity boundaries. Specific techniques are described two key processes: recovering the conformation space curve (e.g., boundary) from its two-dimensional projection an image, interpolating smooth surfaces The relevance general theory low-level vision discussed.