About: http://webisa.webdatacommons.org/11802098

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	where BR(x,y) and BL(x+d,y) denote the intensity values at R(x,y) and L(x+d,y), respectively, and Th is a predetermined threshold value;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com