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Spherical Harmonic Descriptor for Image Shape Matching

Spherical harmonics is of importance for spherical signal analysis.This paper matches shape similarity among images by a spherical harmonic descriptor.First,images are mapped into spherical images,then the similarities are matched among spherical images by a spherical harmonic descriptor.The experimental results show that the spherical harmonic descriptor is not only precise in image shape matching but also invariant to rotation and scale transforms.