1. A method, comprising: performing, by one or more computers: receiving a plurality of stereo images of an object of a type and at least one three-dimensional input model of the same type of object; generating a three-dimensional stereo model of the object from the plurality of stereo images; computing a confidence measure for the stereo model; aligning the stereo model with the at least one input model resulting in an aligned model; and generating a fused model, wherein said generating a fused model comprises combining the stereo model with the aligned model, wherein said combining includes weighting the stereo model and the aligned model based, at least in part, on the confidence measure.