Hideki Noda Michiharu Niimi Jin Korekuni Simple and Efficient Colorization in YCbCr Color Space. 685-688 2006 conf/icpr/2006 ICPR (3) http://doi.ieeecomputersociety.org/10.1109/ICPR.2006.1053 db/conf/icpr/icpr2006-3.html#NodaNK06