Ying Zhang Yanjun Li Ke Zhang Hongmei Wang Meili Li SAR and Infrared Image Fusion Using Nonsubsampled Contourlet Transform. 398-401 2009 JCAI http://doi.ieeecomputersociety.org/10.1109/JCAI.2009.68 conf/jcai/2009 db/conf/jcai/jcai2009.html#ZhangLZWL09