@inproceedings {wong2007robust,
	title = {Robust invariant descriptor for symbol-based image recognition and retrieval},
	booktitle = {International Conference on Semantic Computing (ICSC 2007)},
	year = {2007},
	pages = {637{\textendash}644},
	publisher = {IEEE},
	organization = {IEEE},
	author = {Wong, Alexander and Bishop, William}
}
