Michiharu NiimiHideki NodaEiji KawaguchiRichard O. EasonLuminance Quasi-Preserving Color Quantization for Digital Steganography to Palette-Based Images.252-2542002conf/icpr/2002ICPR (1)https://doi.org/10.1109/ICPR.2002.1044674https://doi.ieeecomputersociety.org/10.1109/ICPR.2002.1044674db/conf/icpr/icpr2002-1.html#NiimiNKE02