3D Shape Recovering DemoSymmetry is ubiquitous; most objects and animals are symmetric. If a 3D shape is symmetric, a 3D recovery problem is simplified. An image of a symmetric shape from another viewpoint can be generated from its single 2D image. For example, an image of a symmetric human face from a left 3/4 view is identical to a mirror reflected image of the same face from a right 3/4 view. These two images allow a 3D shape recovery using multiple view geometry. I propose a computational model for recovering a 3D shape from a single 2D image using symmetry.The contours were drawn by observers by hand. The 3D shapes were recovered based on the drawn contours. For the detail of the model, please refer to Sawada, & Pizlo (2008) and Li, Pizlo, & Steinman (2008) Click to start the demo 3D Skeleton Recovering DemoThe 3D shapes of such objects as animal bodies can be represented quite well by a 3D symmetric skeleton. Animals can have asymmetric poses, but the poses are always biased towards symmetric configurations because of biomechanical constraints on joints. My computational model of 3D shape recovery (see above) can be applied to the 2D image of a 3D articulated animal; more specifically, to a projected skeleton of the articulated animal.The skeletons were drawn by observers by hand. Symmetric correspondences of joints were given by hand. The 3D skeletons can be recovered using our 3D shape recovery algorithm. Click to start the demo |