INTERPRETING NON-3-D LINE-DRAWINGS

This paper shows how to create a small number of natural interpretatio ns for non-3-D line drawings. If all constraints are removed, there is an infinite number of possible interpretations. However, humans insti nctively create a limited number of interpretations. In order to obtai n these interpretations, it is first necessary to check whether the li ne drawing requires figural completion. To ensure that natural figural completion is carried out, restrictions on figural completion, possib le completion paths, and an actual process for completing figures are introduced. Next, constraints are introduced to reduce the number of i nterpretations. These include constraints concerning line elements, du plication, connectedness, inclusiveness, closure, good figures, and li ne sharing. The results of a psychological experiment show that the pr oposed method can create a small number of natural interpretations tha t correspond to human visual perception fairly well.