Sep.10, 2013 Wow, this is really cool. Scientists at Tel-Aviv University in Israel and Tsinghua University in Beijing have moved the cut-and-paste into the third dimension. With just a few mouse clicks, a software can extract an 3D object out of a photograph and turns it into a 3D, editable creation. Scheduled to be demonstrated at Siggraph Asia 2013 in November, the software '3-Sweep' lets the user to select an object in a photo by swiping along them with a mouse cursor. It takes three mouse strokes to generate a 3D component and each stroke defines one dimension of the component. The computer reshapes the component to fit the image of the object in the photograph as well as to satisfy various inferred geometric constraints imposed by its global 3D structure. Once the 3D object has been extracted, it can be quickly edited, rotated, adjusted and placed back into photos or 3D scenes, permitting object-driven photo editing tasks which are impossible to perform in image-space. The team behind it (Tao Chen, Zhe Zhu,, Shi-Min Hu and Daniel Cohe) wrote: We introduce an interactive technique for manipulating simple 3D shapes based on extracting them from a single photograph. Such extraction requires understanding of the components of the shape, their projections, and relations. These simple cognitive tasks for humans are particularly difficult for automatic algorithms.
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