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<p><b>Abstract</b>—The extraction of motion and shape information of three-dimensional objects from their two-dimensional projections is a task that emerges in various applications such as computer vision, biomedical engineering, and video coding and mining especially after the recent guidelines of the Motion Pictures Expert Group regarding MPEG-4 and MPEG-7 standards. Present work establishes a novel approach for extracting the motion and shape parameters of a rigid three-dimensional object on the basis of its orthographic projections and the associated motion field. Experimental results have been included to verify the theoretical analysis.</p>
3D motion, 3D structure, structure from motion, orthography.

Y. Xirouhakis and A. Delopoulos, "Least Squares Estimation of 3D Shape and Motion of Rigid Objects from Their Orthographic Projections," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 22, no. , pp. 393-399, 2000.
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