About: http://webisa.webdatacommons.org/116819459

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	I have never heard of such a filter, but I suppose it could be of some use if you only need to affect the top and bottom of the image, i.e. the sky and the foreground grass, and do not care about the centre region or the edges.
http://www.w3.org/ns/prov#wasQuotedFrom	velocityreviews.com