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anton_foy
31st January 2006, 23:47
I have searched the forum of a grain filter but the only one I found was AddGrain which is good but not as adjustable for my purpose.

Im looking for a grainfilter that will give coloured grains and if possible size, speed/movement and strength/sharpness.
The grains in film (16mm or 35mm) are in some stocks more visible and has more colour while other stocks has less. Often the grains look like a mixture of blue and yellow grains together with normal B/W grain.
The grain in 16mm is a lot blurrier (not to mention 8mm)and bigger than in 35mm for example.
With speed and movement I mean changing in fps like Adobe AfterFX's "HSL Auto Noise". It uses dissolve/morph between the grains (it looks like) to mimic for example; 17 fps on 25fps clip. Well its not so important I just wanted you to get the idea.
Also the grains are weaker or none in the lighter areas of the image.
I have tried most of the programs such as Magic Bullet, Cinelook and other crappy commercial ones and hoped to find a better one here ;)

Well I guess its too complicated to make a filter like AddGrain to perform these kind of operations but is it possible to choose colour for the grain and maybe stack several addgrain() after eachother to achieve this?

Thank you

foxyshadis
1st February 2006, 00:22
http://forum.doom9.org/showthread.php?t=105297&highlight=grain

If I get time tonight I'll pretty up my modifications and post it. Then again, it may only be suited to my tastes. ;)

anton_foy
1st February 2006, 00:53
http://forum.doom9.org/showthread.php?t=105297&highlight=grain

If I get time tonight I'll pretty up my modifications and post it. Then again, it may only be suited to my tastes. ;)

Thats great Foxyshadis! :)

Here is a more visual and exaggerated example:
http://www.xtreem.nu/jonas/grainy.jpg

[EDIT] if I knew more of the theory behind how the eye percieves noise, grain, motion, and edges. Hmm, maybe a film board is a better place to ask than an encoding board.

No need to do that just ask me :P