Rolf Eckmiller Rolf Schatten Oliver Baruth Portable Biomimetic Retina for Learning, Perception-based Image Acquisition. 2436-2441 2007 IJCNN http://dx.doi.org/10.1109/IJCNN.2007.4371340 conf/ijcnn/2007 db/conf/ijcnn/ijcnn2007.html#EckmillerSB07