Automatic registration of SAR and optical images based on linear features and neural network

Abstract

An automatic SAR and optical image registration approach based on linear features and neural network is proposed. First, fuzzy linear feature extraction algorithm is used and common straight line segments between SAR and optical images are kept for matching primitives. Then discrete relaxation method is adopted to get acceptable matched primitives of two images and the crossing points of these matched line segments are taken as control points of image registration. Lastly, neural network is employed to realize theimage transformation and resampling. The experimental results are given and show that the proposed image registration approach can resolve the registration of SAR and optical images including long and thin objects effectively.