Takuji Kamada Akitoshi Hanazawa Takashi Morie Shadow Elimination Mimicking the Human Visual System. 147-151 2010 Brain-Inspired Information Technology http://dx.doi.org/10.1007/978-3-642-04025-2_25 series/sci/2010-266 db/series/sci/sci266.html#KamadaHM10