Slight Posterization on Skin?

GraphicPlanet

GraphicPlanet

Well-known member
Hi guys, I was wondering if anyone can shed some light on my issue. I seem to be getting a slight posterization on skin tones with my AF100 footage. I use a GH2 for a B Cam and I don't get it there. Here's an uncorrected image and here are my scene file settings. Thanks!

Film Cam
1080/24p
Detail Level: -3
V Detail Level: -3
Detail Coring: 1
Chroma Level: -4
Chroma Phase: 0
Color Temp A & B: 0
Master Ped: 0
DSR Level: 3 Same thing happens when I'm at 1 here.
Gamma: B Press
Knee: Low
Matrix: Norm 2
Skin Tone Detail: Off

Interview-shot.jpg
 
Don't use DRS if you don't have to. It can really extend the range but it also causes some odd side effects. Try it without DRS...

Plastic/smoothed-out skin (or, as Kholi calls it, the "oil paint effect") can happen when your coring setting is too high; I wouldn't expect it with a coring setting of +1, but with a high setting (like +5 or higher) I could see that as a side effect. The "coring" function is analogous to the GH2's "Noise Reduction" setting; if you have NR on the GH2 set to -2, then you should probably be using a much lower coring setting on the AF100 if you want to see basically comparable results.

I'd also consider the skin quite overexposed. On a caucasian I normally want the skin tones to be around 60, with the very very peaks just touching 70. In your shot, pretty much all the skin is above 70, with the peaks at about 80.
 
Yeah Id say its over exposed as well. I let the highlights just ht 70 on my zebras.
Aslo when you say its too dark, do you mean on the lcd screen or when you actually look at the footage?
I often look at my camera and think it looks a bit dark but trust my zebras and waveform and find once imported it looks great.
 
I keep my zebras at 70 and 100. When on 70, you should just barely see the slightest hint of zebras on the skin. At 100, that's when things are basically clipping (well, 105 = clipping, but at 100 they may be shifting colors due to chroma clipping). So set the zebras on 70 and expose for the skin, then set them on 100 and check for overexposure. Skin just barely hitting 70 on the very hottest/brightest spots, and no clipping at 100 anywhere in the frame, means thumbs-up to go ahead and shoot.
 
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