Arun Sharma Dinesh Kant Kumar Sanjay Kumar Neil McLachlan Wavelet Directional Histograms for Classification of Human Gestures Represented by Spatio-Temporal Templates. 57-63 2004 conf/mmm/2004 MMM http://csdl.computer.org/comp/proceedings/mmm/2004/2084/00/20840057abs.htm db/conf/mmm/mmm2004.html#SharmaKKM04