Measuring conic properties and shape orientations : 2D point sets

ISBN-13: 9783639179552 / Angielski / Miękka / 2009 / 140 str.

Milo Stojmenovi

Opis

New methods for computing a shape s orientation andseveral shape measures for elongation, linearity,circularity, ellipticity, hyperbolicity, andparabolicity of 2D point sets are outlined. Thesemeasures are invariant to rotation, scaling, andtranslation. They are calculated very quickly aswell. Among other things, we discover that thedefinition of elongation highly correlates with thedefinition of linearity. All of the shape measuresare tested on digital curves and compared withexisting methods. All of the methods work in realtime. The goal was to find a way of identifying basicshapes in images. The motivation was to be able touse these basic shape descriptors as features in acomputer vision system, where more complicated shapescan be seen as collections of basic ones. This way, acomputer should one day be able to identify theobjects in even the most complicated scenes we dealwith in our daily lives.

O autorze

The author completed his PhD at the University of Ottawa in the
fall of 2008, in the field of Computer Science. His research
interests lie in Computer Vision, Image Processing, and Pattern
Recognition. His Masters was done at Carleton University, in
2005. Applications of his work are found in surveillance and
security, and medical imaging.