Finding Two Optimal Positions of a Hand-Held Camera for the Best Reconstruction

This paper proposes an experimental study to find the two optimal positions of a hand-held digital camera for the capture of the geometry and texture of an object. Using our improved 3D reconstruction pipeline based on a semi-dense matching between a pair of uncalibrated images, a layout of twenty-five camera positions is tested in real conditions of image acquisition and also completely simulated. The reconstruction quality is measured by assessing the accuracy of the final 3D structure in accordance with a ground truth. The results provide the optimal capturing layout. Another interesting conclusion is that the accuracy of the reconstruction does not change much in the nearby area around the best position, which enables to the hand-held capture to not strictly respect this configuration.