This paper presents a novel approach to identify complex shapes based on the Radon
transform. We propose an adaptation of Radon transform called R-transform, which is
invariant to common geometrical transformations. Moreover, to improve the uniqueness of
the approach, a binary shape is projected into the Radon space for different levels of the
Chamfer distance transform. The accuracy and the efficiency of the proposed algorithm in
the presence of a variety of transformations are evaluated within a shape recognition …