A Model Based Method for Overall Well Focused Catadioptric Image Acquisition with Multi-focal Images

摘要

Based on an analysis on the spatial distribution property of virtual features, we propose that the shapes of the best focused image regions in multi-focal catadioptric images can be modeled by a series of neighboring concentric annuluses. Based on this model, an over-all well focused image can be obtained by combining the best focused regions from a set of multi-focal images in a fast and reliable manner. A robust algorithm for estimating the model parameters is presented. Experiments with real catadioptric images under a variety of scenes verify the validity of the model and the robust performance of the algorithm.