About: http://webisa.webdatacommons.org/137523803

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	During processing, the grayscale output level gi for each pixel position i is scaled to produce the illumination source-corrected level g'i according to the relationship ##EQU1## where k is an appropriate normalizing constant.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com