Dhiraj Joshi Ritendra Datta Elena A. Fedorovskaya Quang-Tuan Luong James Ze Wang Jia Li Jiebo Luo Aesthetics and Emotions in Images. 94-115 2011 28 IEEE Signal Process. Mag. 5 http://dx.doi.org/10.1109/MSP.2011.941851 db/journals/spm/spm28.html#JoshiDFLWLL11