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Photo Compositing Collage, montage, masking, selections, combining, etc.

how to add noise with noiselayer correctly?

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Old 02-26-2007, 07:34 AM
smiley guy smiley guy is offline
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Join Date: May 2005
Location: Cambridge, Ontario
Posts: 112
Re: how to add noise with noiselayer correctly?

That is interesting... I'll have to check that out later. Colour checking by numbers and not by my eye! I don't notice any change but the numbers would indicate otherwise.
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Old 02-27-2007, 03:14 PM
ikagami ikagami is offline
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Join Date: Feb 2007
Location: netherlands
Posts: 13
Re: how to add noise with noiselayer correctly?

Originally Posted by pure

i am about to put a person into a ready shot scene, its film and grainy in color. the grain is intended, and the new shot is digital and there is no grain.
so i built the person into the scene and added a layer above all person layers, selected the persons' alpha channel, filled it with white and used filter "add noise (b&w, gaussian) at 2 px, 3 times one after another – with blending mode "abblenden" (sorry how is that called in english?) and that made a nice grain over the person looking kind of real. its not 100% real so i would like to ask how to set the blending mode correctly.

i tried all blending possib., but there wasnt any nice than "abblenden" and also no better one (?)

when i visually analyze the original grain in the film scan at lets say 300% magnification or more, its also looking like noise, which i can reproduce with "add noise" filter but the noise has always the color the background is like. for example in the sky, the filmgrain is blueshaded and over skin its brown-beige shaded. my noise level is just a black grain and doesnt have the color the background or person has, if i add colornoise in the filteroption, the color is like a rainbow and doesnt look real, too.

any idea?

try to get the same film and have it developed so you get a blank strip
have this scanned and use the overlay option to bring in only the filmgrain...
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