Hi, Reinhard Kotucha writes:
> [...] > I could probably improve the results if anybody tells me what these > values mean and how to apply them: > > FilmMatR 1.4234 -0.3230 0.0061 -29.7088; > FilmMatG 0.0600 0.9677 0.0719 -31.3147; > FilmMatB 0.1562 -0.5104 1.4530 -28.9059; I'm not sure about the rightmost column but this is a color correction matrix. You apply it on the incoming (or gamma corrected?) RGB values via matrix multiplication like so R' = 1.4234 * R + -0.3230 * G + 0.0061 * B + -29.7088 G' = 0.0600 * R + 0.9677 * G + 0.0719 * B + -31.3147 B' = 0.1562 * R + -0.5104 * G + 1.4530 * B + -28.9059 R, G, B are the values before correction, R', G' and B' the ones after. You may have to clamp the results into the [0,255] range (assuming 8bit samples). Hope this helps, -- Olaf Meeuwissen, LPIC-2 FSF Associate Member since 2004-01-27 GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13 F43E B8A4 A88A F84A 2DD9 Support Free Software https://my.fsf.org/donate Join the Free Software Foundation https://my.fsf.org/join -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to sane-devel-requ...@lists.alioth.debian.org
