TY - GEN
T1 - Symmetric shape completion under severe occlusions
AU - Venkatesh, M. Vijay
AU - Cheung, Sen Ching S.
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - In this paper, we propose a novel algorithm for completing rotationally symmetrical shapes under severe occlusions. The intuitive idea is to use the existing contour, under a carefully estimated similarity transform, to fill in the missing portion of a symmetric object due to occlusions. Our algorithm exploits the invariant nature of the curvature under similarity transform and the periodicity of the curvature of a symmetric object contour. To arrive at the appropriate transform, we first estimate the fundamental period in the curvature. We use the fundamental period and the harmonic components to estimate the fundamental angle of rotation and the centroid of the unoccluded shape, which in turn establish different modes of symmetry. By following each mode of symmetry we compute the corresponding transform and select the ones that best complete the missing portion of the contour.
AB - In this paper, we propose a novel algorithm for completing rotationally symmetrical shapes under severe occlusions. The intuitive idea is to use the existing contour, under a carefully estimated similarity transform, to fill in the missing portion of a symmetric object due to occlusions. Our algorithm exploits the invariant nature of the curvature under similarity transform and the periodicity of the curvature of a symmetric object contour. To arrive at the appropriate transform, we first estimate the fundamental period in the curvature. We use the fundamental period and the harmonic components to estimate the fundamental angle of rotation and the centroid of the unoccluded shape, which in turn establish different modes of symmetry. By following each mode of symmetry we compute the corresponding transform and select the ones that best complete the missing portion of the contour.
KW - Image shape analysis
KW - Interpolation
UR - http://www.scopus.com/inward/record.url?scp=78649825916&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649825916&partnerID=8YFLogxK
U2 - 10.1109/ICIP.2006.312439
DO - 10.1109/ICIP.2006.312439
M3 - Conference contribution
AN - SCOPUS:78649825916
SN - 1424404819
SN - 9781424404810
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 709
EP - 712
BT - 2006 IEEE International Conference on Image Processing, ICIP 2006 - Proceedings
T2 - 2006 IEEE International Conference on Image Processing, ICIP 2006
Y2 - 8 October 2006 through 11 October 2006
ER -