Tiemo, The distance between any colour (1) and a colour chosen by you (2; e.g. r=0, g=0, b=255) can be calculated as
sqrt((r1-r2)^2+(g1-g2)^2+(b1-b2)^2) <= T where T is a threshold between 0 and 442 set by you. Change the colour of the background pixel whenever the distance between the colour of that pixel and your selected colour is less than the threshold. I use this technique in Color Converter http://www.color-converter.com -- Best regards, Mark Schonewille Economy-x-Talk Consulting and Software Engineering Homepage: http://economy-x-talk.com Twitter: http://twitter.com/xtalkprogrammer KvK: 50277553 New: Download the Installer Maker Plugin 1.6 for LiveCode here http://qery.us/ce On 1 jul 2011, at 11:39, Tiemo Hollmann TB wrote: > Hello, > > I am taking the mousecolor at different points from an image by script (not > by clicking). I would like to analyse if the color I've taken is a "kind of > blue", or another color. I want to change the backgroundcolor of an image. > The background is always blue, but different blues and changing over the > background. So what I want to do is to verify, what is background and what > is foreground of my image. > > 100% pure blue would be 0,0,255. But for a human being 25,75,130 (greyblue) > is also still blue, but 240,20,180 is pink, though the third RGB value is > higher as in my greyblue. > > So I can't just check only the third RGB value, neither the sum or cross > total. Has anybody ever heard, if you can define at all by math "what is > blue"? > > Any color specialist around here? > > Tiemo > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
