@Article{KannalaBrandt,
author = {Kannala, J. and Brandt, S.~S.},	
title = {A generic camera model and calibration method for conventional, wide-angle, and fish-eye lenses.},	
year = {2006},	
volume = {28},	
pages = {1335--1340},	
number = {8},	
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence}	
}