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In this study, we present a novel model-based approach to reconstruct the 3D human posture from a single image. The approach is guided by a posture library and a set of constraints. Given a 2D human figure, i.e., a set of labeled body segments and estimated root orientation in the image, a 3D pivotal posture whose 2D projection is similar to the human figure is first retrieved from the posture library. To facilitate the retrieval process, a table-lookup technique is proposed to index posturesdoi:10.1016/j.jvcir.2005.01.002 fatcat:ewohe4b6zfcxjbt6h32godwj4y