@inproceedings {wong2008robust,
	title = {Robust Edge Detection Based on Non-Local Contribution of Local Frequency Characteristics},
	booktitle = {2008 Tenth IEEE International Symposium on Multimedia},
	year = {2008},
	pages = {119{\textendash}123},
	publisher = {IEEE},
	organization = {IEEE},
	author = {Wong, Alexander and Bishop, William}
}
