Abstract
This paper presents an automatic image-based modelling method based on shape from silhouettes that does not need any user interactions of camera calibration or image segmentation. Under circular motion constraints, using an iterative optimisation of graph cuts and conjugate direction minimisation, we can label an object's visual hull and minimise silhouette coherence, which is the difference between projected visual hull and the background-subtracted silhouettes. This process can converge to accurate camera parameters and smooth visual hull. Using Graphics Processing Unit and its parallel computation ability, our approach is not only automatic but also efficient, and can produce realistic 3D models.
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