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http://dx.doi.org/10.5573/ieek.2013.50.9.136

Markerless Motion Capture Algorithm for Lizard Biomimetics  

Kim, Chang Hoi (Nuclear Technology Convergence Division, Korea Atomic Energy Research Institute)
Kim, Tae Won (Nuclear Technology Convergence Division, Korea Atomic Energy Research Institute)
Shin, Ho Cheol (Nuclear Technology Convergence Division, Korea Atomic Energy Research Institute)
Lee, Heung Ho (Electrical Engineering Division, Chungnam National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.9, 2013 , pp. 136-143 More about this Journal
Abstract
In this paper, a algorithm to find joints of a small animal like a lizard from the multiple-view silhouette images is presented. The proposed algorithm is able to calculate the 3D coordinates so that the locomotion of the lizard is markerlessly reconstructed. The silhouette images of the lizard was obtained by a adaptive threshold algorithm. The skeleton image of the silhouette image was obtained by Zhang-Suen method. The back-bone line, head and tail point were detected with the A* search algorithm and the elimination of the ortho-diagonal connection algorithm. Shoulder joints and hip joints of a lizard were found by $3{\times}3$ masking of the thicked back-bone line. Foot points were obtained by morphology calculation. Finally elbow and knee joint were calculated by the ortho distance from the lines of foot points and shoulder/hip joint. The performance of the suggested algorithm was evaluated through the experiment of detecting joints of a small lizard.
Keywords
lizard; biomimetics; markerless motion capture; silhouette image; 3D reconstruction;
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