About: http://webisa.webdatacommons.org/132162011

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Threshold imaging may be done, for instance, by defining a desired threshold black/white level and then comparing each grey-scale pixel to this threshold level to determine whether it falls above or below the threshold level.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk