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