Hi, On Fri, Feb 17, 2006 at 05:40:27PM +0100, Antonio Diaz Diaz wrote: > >I've noticed that GNU Ocrad 0.14 implements reading of color images and > >looked at the code (without testing it). You seem to use the formula > > > >greyvalue = min(red, green, blue) > > > >which does not at all work like the human eye. > > You are right in that it does not at all work like the human eye, but I > tried several formulas and this gave the best results for detecting > color letters on a white background. Your formulas seem to give better > results for images of real objects.
I did not test it, but I am quite sure that your formula performs poorly when having colored text on a colored background. On a white background your formula is indeed the best choice. Do as you like, I just wanted to make sure this was not done by accident. :-) Erik _______________________________________________ Bug-ocrad mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-ocrad
