pix_gain 1 1 1 -1 should do this. although I think there is a bug in some gem versions. and maybe you have to use something like 1 1 0.9999 -1 to get it to work. marius.
2009/10/14 rene beekman <[email protected]>: > that inverts the entire image, not just the alpha channel... > > > On Oct 14, 2009, at 05:35, Jose Luis Santorcuato wrote: > >> [pix_invert]...i think... >> >> Cheers >> >> Chile >> >> 2009/10/11 rene beekman <[email protected]> >> >> how does one invert an alpha channel in gem ? >> i've created an alpha channel from the rgb channels, but need the channel >> to be inverted. somehow i can't seem to find a way to do this... >> >> hope it is just sleep deprivation and i'm simply overlooking the >> obvious... :) >> >> thanks in advance, >> >> rene >> >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >> >> >> -- >> http://www.chilemigra.cl >> http://arselectronicachile.blogspot.com >> http://www.myspace.com/santorcuato >> >> > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
