Takahiro Saito Haruya Aizawa Daisuke Yamada Takashi Komatsu Nonlinear color-image decomposition for image processing of a digital color camera. 72500 2009 Digital Photography https://doi.org/10.1117/12.805231 conf/dphoto/2009 db/conf/dphoto/dphoto2009.html#SaitoAYK09