I'm trying to reduce noise using multiple photos of the very same subject, using both a tripod or simply repeating a scan a number of times ( i have a flatbed scanner with a lot of noise especially in dark areas... )
So far i have tried with my old broken camera that had powerful noise at 400 iso and first results are not bad at all. Samples: http://img90.imageshack.us/img90/6967/prova1wc2.jpg http://img131.imageshack.us/img131/448/prova2xh7.jpg http://img116.imageshack.us/img116/7589/prova3on7.jpg ( heavy purple fringing is probably due to the fact that i choosed 5/7 of the max resolution, 5 mp instead of 7 ) But i have still some questions: I have used the first level, as normal, with 100% opacity, then i have added other 9 levels ( 9 photos ), with opacity 100/9=11,1, and mode set to normal. If i use 10 levels, at 10% opacity each one, the brightness of the result is different from the original ( lighter ). An example: i would like to use a grayscale image, shot 3 times. For a given pixel, i have that first image is 200, second 190, third 192. So i would like to have as a result (200+190+192)/3=194 So what do you think i should use? Thank you in advance. Giulio. ---------------------------------------------------------------------------- DEXGATEMICRO il centralino VoIP multifunzione per l'azienda. Prova gratuita per 4 utenti! Scopri tutte le funzionalita' sul sito Dexgate.com ---------------------------------------------------------------------------- _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
