@INPROCEEDINGS{1040021, 
author={B. {Li} and E. {Chang} and CT {Wu}}, 
booktitle={Proceedings. International Conference on Image Processing}, 
title={DPF - a perceptual distance function for image retrieval}, 
year={2002}, 
volume={2}, 
number={}, 
doi={10.1109/ICIP.2002.1040021}, 
ISSN={1522-4880}, 
month={Sep.},}