Best settings to reduce Grainy image?

M

MooseFunk

Member
Im just wondering what is most important to set when it comes to reduse grainieness (?, don´t know how to spell that)?
I have alot of problems with getting footage "clean", meaning that especially darker colors get grainy, i think thats the right term. It´s not just dark it is "alive"! Feels like really crappy quality sometimes even in well lit situations, like filmed with a cell phone in worst cases, even without any gain on!

What do i need to work with?

thnx
 
Have a look at this thread for some scene file settings and have a play. http://www.dvxuser.com/V6/showthread.php?t=101419
Also read the DVX book and learn what each component of the scene file does. Once you've established a look you like , you can tweak it from there as to whether you get a clean or noisy image. Detail coring and detail level are of great importance here.
 
The DVX is a fairly noisy cam as DV cams go. The DVX100A is the worst, the DVX100B is the best. A lot of people compare it favorably to film grain. Watch for grain on the big screen next time you go to the movies, it's everywhere.

DETAIL CORING is described in some of the product literature as "digital noise reduction." Turn it up to decrease noise.

DETAIL can be turned down to avoid oversharpening and lessen the visibility of noise.
 
In post use after effects and use the noise reduction filter and play with the settings so it does not look really soft
 
MooseFunk said:
What do i need to work with?

thnx
Click to expand...

Work with some light.

Dark = grain no matter WHAT you shoot with. A $300 or a $300,000 camera. All of them love light. Same with film.

If you are talking about footage you've already shot, then you need some good denoising software. I use a variety of stuff, but mostly the MSU denoiser plugin for Virtualdub. I've worked miracles with that one. Dynamic Noise Reducer has also been VERY helpful.
 
different cameras have different image to noise ratios in the same light level, also different cameras have different sensitivity levels.

if you shoot a candle as the only light source few feet away from the cameras and a subject one meter away from the candle and compare different cameras, the result will vary too much, you won't even believe they were shot in the same conditions.
 
The point, of course, being that the amount of light is directly related to the amount of noise you get. Less light, more noise.

Also, color correction can well bring out more noise -- if you have misbalanced color and try to bring out more of a color that there's little of, you'll see more noise in that channel, the same as brightening dark footage brings out noise.
 
i have alot to learn, im happy i just got my dvx book!
thnx gain! will return when i can specify my questons abit better!
 
Get as much light in as you can. You can always darken an image in post. Shooting too dark then trying to pull stunts in AE, PP or FCP (or whatever your post workflow is) is asking for trouble.

The camera compensates for low light by artificially creating light - boosting the light via internal computer processing - this is not good.
 
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