Boundary Shape Recognition Using Accumulated Length and Angle Information

In this paper we present a method to recognize shapes by analyzing a polygonal approximation of their boundaries. The method is independent of the used approximation method since its recognition strategy does not rely on the number of segments composing the shape. Length and turning angle information are extracted from the chain of segments. The comparison method is invariant to scale, translation and some occlusions of the extracted contour. A simple pre-processing method, also based on arc-length features, is presented to be used as a coarse fitting method to determine angle rotation and as a first filter to eliminate non pertinent candidates.

• Type: Conference
• Year: 2007
• Where: IBPRIA
• Authors: Marçal Rusiñol, Philippe Dosch, Josep Lladós
• Keywords: Approximation Method, Coarse fitting Method, IBPRIA 2007, Image, Image Analysis, Simple Pre-processing Method