Reducing DVX noise

D

Damien

Member
Hi,
Upon reading the comparison tests of the three cameras, the fact that DVX has more noise was brought up.
I have found that when testing my camera outside that the greens (particularly grass and tree leaves) looked the noisiest everytime but the blacks looked fine.
The noise in these parts of the frame looked the most distracting than any other noise overall in the frame.

Does anyone know any menu settings or other thoughts on decreasing noise? I personally would rather have less low light sensitivity and a cleaner picture if that is the trade off.
 
Re: Reducing DVX noise

I went by some tips from people on here. these are the settings I currently have; the noise is much less then when I bought the camera. If anyone would like to suggest modifications to further reduce noise, that would be fabulous!


SCENE FILE:

DETAIL LEVEL = 0

V DETAIL LEVEL = 0

DETAIL CORING = +7

CHROMA LEVEL = -7

CHROMA PHASE = -7

COLOR TEMP = 0

MASTER PED = -5

A. IRIS LEVEL = -3

GAMMA = [ ]LOW, [X]NORM, [ ]HIGH, [ ]B.PRESS, [ ]CINE-LIKE, [ ]CINE-LIKE_D, [ ]CINE-LIKE_V

KNEE = [X]AUTO, [ ]LOW, [ ]MID, [ ]HIGH

MATRIX = [ ]NORM, [ ]ENRICHED, [X]FLOU, [ ]CINE-LIKE

SKIN TONE DTL = [X]OFF, [ ]ON

V DETAIL FREQ = [X]THIN, [ ]MID, [ ]THICK

PROGRESSIVE = [ ]OFF, [ ]30P, [ ]24P, [X]24P(ADV)
 
Re: Reducing DVX noise

oh yeah, and someone had also told me to stay far far away from CINE-LIKE_D gamma setting.
 
Re: Reducing DVX noise

Yes, stay far away from cine-like-D. I normally use a master PED at -6, which figures out to be 0% black when shot with the lens cap on. As far as the chroma phase and level, that is just rediculous. There is no reason that you should be shooting at -7 for both. For chroma level I wouldn't go past +1 or +2 if you don't want noise, but here is the real secret. Get yourself a nice 85B 72mm filter (it's the strong orange one). This filter is specifically balanced for shooting tungsten film under daylight. SO set your camera to 32k, or just slap the filter on and do your normal white balance through it. You can shoot jsut like you had balanced without the filter, but you will notice that the picture will be far less grainy. With this filter you will find that you can have your setting at almost anything and the results will look great. The is definatly one of the most important filter purchases for the DVX. I was skeptical when I first heard it as well, but the results speak for themselves.
 
Re: Reducing DVX noise

I don't understand how a temperature correction filter can change the noise level ?

Thanks,
Ulisses
 
Re: Reducing DVX noise

Damien, I noticed you mentioned leaves and grass specifically. Trees and foilage (depending on distance, light, etc) generally looks poor thanks to DV compression. Some of what you are seeing as noise may also be artifacts.
 
Re: Reducing DVX noise

Ok,

but blue channel should be bad alone, like commented about leaves and grass they will be more present in the luminance / green channel. Anyway I guess there are other ways to reduce noise without a color correction filter (using a 4:4:4 HD or 35mm camera ? :)

Thanks,
Ulisses
 
Re: Reducing DVX noise

so would it be better to have my chroma level and chroma phase at 0 instead of -7?
 
Re: Reducing DVX noise

Depends on the look you want> Do you want saturated colors, or not. Chroma phase acts more as adjusting the tint of the color, so that is personal preference. I usually shoot with my chroma level at -1 or 0, but it really depends on the shoot.
 
Re: Reducing DVX noise

I think it might reduce it very slightly, maybe 1/4 to 1/2 stop, but if your balancing for daylight, usually this is not a problem.
 
Re: Reducing DVX noise

[quote author=ronik15 link=board=Events;num=1105638652;start=15#15 date=01/17/05 at 13:10:55]does it reduce light?
or you use the same aperture?[/quote]

2/3 of a stop

It will convert 3200 to 5600
 
Re: Reducing DVX noise

Use a #85, "Because it reduces the blue and the blue channel is noisy.  It's a DV thing."

This sounds like a great tip. David and Sharky, I don't recall seeing this in Barry's book.

Has anyone done tests that evaluate the actual effect of the "balance to #85 approach?"

Is this one of those things that is in widespread use, with consensus agreement among DV pros, or is it more in the try it and, who knows, see what you think department?

Thanks!
 
You must log in or register to reply here.
Back
Top