Alexandre X. Falcão Jorge Stolfi Roberto de Alencar Lotufo The Image Foresting Transform: Theory, Algorithms, and Applications. 19-29 2004 26 IEEE Trans. Pattern Anal. Mach. Intell. 1 http://csdl.computer.org/comp/trans/tp/2004/01/i0019abs.htm db/journals/pami/pami26.html#FalcaoSL04