The use of the curvature extremes of the smoothed contour for a reliable shape comparison suitable for shape retrieving is analysed. The shape contours are smoothed using linear diffusion of the contour. A diffusion scale proportional to the contour dimension is chosen, improving the uniform scaling invariance. The relative positions of the smoothed contours curvature extremes are compared, resulting in a shape similarity measure. This method is compared with the resulting from comparing the maxima of the scale-space maps of the contours' curvature zero-crossing (CSS), used in MPEG-7. It is shown that those maxima always coincide with a curvature extreme at the maximum scale. Retrieving examples using the proposed method, are compared with the results of a CSS implementation. A visual improvement of the retrieving results was found. The results were also compared with a polygonal approximation based method.
Identification of similar shape contours based on the curvature extremes description
01.01.2005
769247 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Identification of Similar Shape Contours Based on the Curvature Extremes Description
British Library Conference Proceedings | 2005
|A Variational Model for Capturing Illusory Contours Using Curvature
British Library Online Contents | 2007
|Contours Smoothing for Non-Occluded Planar Shapes Description
British Library Conference Proceedings | 2005
|Multi-Reference Shape Priors for Active Contours
British Library Online Contents | 2009
|