Hello all, i am analyzing the pix_contrast object and can't get through this. If both the contrast and saturation values are 0., shouldn't we obtain a black image? I'm just getting gray... best, J -- Jaime E Oliver LR joliverl at ucsd.edu www.realidadvisual.org/jaimeoliver www-crca.ucsd.edu/ www.realidadvisual.org 9168 Regents Rd. Apt. G La Jolla, CA 92037 USA