A new approach to computation of curvature scale space image for shape similarity retrieval
The Curvature Scale Space image is a multi-scale organisation of the inflection points of a closed planar curve as it is smoothed. It consists of several arch shape contours, each related to a concavity or a convexity of the curve. In our recent works, we have used the maxima of these contours as shape descriptors to find similar shapes in large image databases. In this paper, we address the problem of shallow concavities. They may give rise to large contours in the CSS image. These contours may then match contours corresponding to deep and wide concavities during the matching process.
We have introduced a method to adjust the height of every CSS image contour which will be less than the height of the actual contour in the CSS image. A new global parameter for closed curves is also introduced. This parameter, like the CSS image representation, is robust with respect to noise, scale and change in orientation.
KeywordsActual Contour Straight Line Segment Closed Curf Global Parameter Planar Curf
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