Minimum error contrast enhancement (bibtex)
@TECHREPORT{VarPaaKam:2006,
  author = {J. Vartiainen and P. Paalanen and J.-K. Kamarainen and L. Lensu and
	H. K\"alvi\"ainen},
  title = {Minimum error contrast enhancement},
  institution = {Department of Information Technology, Lappeenranta University of
	Technology},
  year = {2006},
  number = {102}
}