Interpreting Line Drawings as Three-Dimensional Surfaces

Harry G. Barrow, Jay M. Tenenbaum

We propose a computational model for interpreting line drawings as three-dimensional surfaces, based on constraints on local surface orientation along extremal and discontinuity boundaries. Specific techniques are described for two key processes: recovering the three-dimensional conformation of a space curve (e.g., a surface boundary) from its two-dimensional projection in an image, and interpolating smooth surfaces from orientation constraints aiong extremal boundaries.

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