>Hi ! > >Just one comment, before you try to change any colour... > >To my mind your picture is over exposed, I think your canon EOS 350D allows you >to control the exposure... so try it ! I think you were in an >automatic mode that has measured the overall luminosity looking at the >center of the picture and unfortunately, this center is dark compared to >the rest of the picture... you probably have other modes... or you can >try to use manual mode... Thank you for the reply. Ok, that is a first point, btw photo is not mine. Anyway ok, if i set -1/3 or -2/3 the color shift is sometimes ( let's say 25% of the times ) less noticeable. >I just downloaded your picture and played with the luminosity and >contrast (the most simple thing we can do, I think!) in gimp and I >obtain "approximatively" the same colour you have in the logo... (I >don't have checked the result looking at the precise colour with gimp >but just comparing by eye). Could you please tell me what values have you used? Here i have tried for example -30 lum and + 15 contrast, and the result is still much less green and much more cyan than the real one. I am not able to mathematically measure it, unfortunatly, but believe me. >An other point is that the picture you take as a reference is, to my mind an >other time... too blue. Perhaps the green is correct? but the >overall colour seems to be blue... I have seen it too. The strange rectangular table with a shape in the front of the train ( over the left red light ) contains, together with the orange slice, a pure black and a pure white, so yes, it is too blue. But balancing color like i often do ( i use curves, picking the near white color, and i put r,g and b channels all the same value, and the same for near black ) still have the "green" problem that is false. By the way, this strange color cast happens only with trains of this color ( 99% ;) ), all other things have not this problem or at least it is not noticeable. I have upped 2 more samples: one that has the right green ( http://www.webalice.it/giulio.canevari/tmp/ALe582-zzz-MilanoGrecoPirelli-19052007-IMG_8443.JPG ) and one with the wrong color ( http://www.webalice.it/giulio.canevari/tmp/E655-207-Cicognola-20052007-merci-IMG_8582.JPG ). Thank you again. -- Giulio Canevari ---------------------------------------------------------------------------- Vuoi rendere inaccessibili agli altri i tuoi documenti riservati? Prova Ksek! Il potente software di cifratura di Interfree. Scopri le sue funzionalita': http://ksek.interfree.it/ Lo Staff di Interfree ---------------------------------------------------------------------------- _______________________________________________ Gimp-user@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
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