Least squares estimation of 3D shape and motion of rigid objects from their orthographic projections

The extraction of motion and shape information of three-dimensional objects from their two-dimensional projections is a task that emerges in Various a pplications such as computer vision, biomedical engineering, and video codi ng and mining especially after the recent guidelines of the Motion Pictures Expert Group regarding MPEG-4 and MPEG-7 standards. Present work establish es a novel approach for extracting the motion and shape parameters of a rig id three-dimensional object on the basis of its orthographic projections an d the associated motion field. Experimental results have been included to v erify the theoretical analysis.