title: A necessary and sufficient condition for a picture to represent a polyhedral scene.
abstract: As Shapira pointed out, a theorem by the author on line drawings of polyhedral scenes was not accurate. The present paper shows that the validity of the theorem is attained by a slight revision of the formulation.
authors.affiliation: Department of Information Science, Nagoya University, Nagoya, Japan 464.
authors.forename: K
authors.initials: K
authors.lastname: Sugihara