title: A rich discrete labeling scheme for line drawings of curved objects.
abstract: We present a discrete labeling scheme for line drawings of curved objects which can be seen as an information-rich extension of the classic line-labeling scheme in which lines are classified as convex, concave, occluding or extremal. New labels are introduced to distinguish between curved and planar surface-patches, to identify orthogonal edges and to indicate gradient directions of planar surface-patches.
authors.affiliation: Computer Science Department-IRIT, University of Toulouse III, 118 route de Narbonne, Toulouse, France. cooper@irit.fr
authors.forename: Martin C
authors.initials: MC
authors.lastname: Cooper
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D003196:Computer Graphics; D017076:Computer-Aided Design; D004282:Documentation / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity