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filmscanners: Photoshop Curves vs Levels
Last couple of days I was working on a scan from my ScanWit from Fuji Super G
400 of my 2 year old son playing with his trucks. I had used a couple of flash
units and screwed up the light level a bit and certainly the background shadows.
The local minilab printed crap, but the expression was cute.. So into VueScan
I went, aweful. Color balance wouldn't come close, way too blue. Also there
was bad posterization in highlights from his face. I went to MiraPhoto and
found I couldn't control where it placed the actual highlights what so ever, it
was mapping the brightest part (those skin reflections) up to 255. Obviously
this wouldn't work.
I took a look at a RAW scan from VueScan in PS and found there was a difference
in skin values or maybe 3 RGB and way too much blue. 7-10 points more blue
than red, which is typically in my children 30-40 below red when skin tones are
in the low 200 range. (the Raw scan was in the 37 to 41 range)
I then took up a curve that was nearly straight up to move my highlights in tke
skin into the 200 neighborhood and spent another couple hours fixing the skin
So my question is:
Is there a fundamental difference between using levels to stretch the histogram
versus using curves to stretch the same with a very steep line?