Visualizing multiple error-sensitivity fields for single camera positioning

摘要

In many data acquisition tasks, the placement of a real camera can vary significantly in complexity from one scene to another. Optimal camera positioning should be governed not only by least error sensitivity, but in addition to real-world practicalities given by various physical, financial and other types of constraints. It would be a laborious and costly task to model all these constraints if one were to rely solely on fully automatic algorithms to make the decision. In this work, we present a study using 2D and 3D visualization methods to assist in single camera positioning based on error sensitivity of reconstruction and other physical and financial constraints. We develop a collection of visual mappings that depict the composition of multiple error sensitivity fields that occur for a given camera position. Each camera position is then mapped to a 3D visualization that enables visual assessment of the camera configuration. We find that the combined 2D and 3D visualization effectively aids the estimation of camera placement without the need for extensive manual configuration through trial and error. Importantly, it still provides the user with sufficient flexibility to make dynamic decisions based on physical and financial constraints that can not be encoded easily in an algorithm. We demonstrate the utility of our system on two real-world applications namely snooker analysis and camera surveillance.