Removing impulse bursts from images by training-based soft morphological filtering
Pertti T. Koivisto, Jaakko T. Astola, Владимир Васильевич Лукин, Vladimir P. Melnik, Oleg V. Tsymbal · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2001
The characteristics of impulse bursts in radar images are analyzed and a model for this noise is proposed. The model also takes into consideration the multiplicative noise present in radar images. As a case study, soft morphological filters utilizing a training-based optimization scheme are used for the noise removal. Different approaches for the training are discussed. It is shown that the methods used can provide an effective removal of impulse bursts. At the same time the multiplicative noise in images is also suppressed together with god edge and detail preservation. Numerical simulation results as well as examples of real radar images are presented.