Affine Shape Comparison using Different Distances

Khalid Aznag - Computer Science Department, Cadi Ayyad University, Marrakesh, Morocco
Toufik Datsi - Computer Science Department, Cadi Ayyad University, Marrakesh, Morocco
Ahmed El Oirrak - Computer Science Department, Cadi Ayyad University, Marrakesh, Morocco
Essaid El Bachari - Computer Science Department, Cadi Ayyad University, Marrakesh, Morocco


Citation Format:



DOI: http://dx.doi.org/10.30630/joiv.4.3.388

Abstract


In this work, we propose to compare affine shape using Hausdorff distance (HD), Dynamic Time Warping (DTW), Frechet (DF), and Earth Mover distance (EMD). Where there is only a change in resolution shape distance are computed between shape coordinates because the distance is not invariant under rotation or affinity. In case of transformation, distances are calculated not between shape coordinates but between Arc length or Affine Arc length. Arc length is invariant under rotation while Affine Arc length is invariant under affinity. The main advantage is invariance under change of resolution, rotation, and affinity.


Keywords


HD;EMD; DF; DTW; Invariant; Arc length; Affine Arc length.

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JOIV : International Journal on Informatics Visualization
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