Ken,
You are really offering a challenge to an old guy of 78 years. I have
avoided learning to use layers, because most of the photos I work with don't
demand it. As winter sets in, I may have to dig in to that approach and see
what it is all about.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Ken Norton" <ken@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Wednesday, October 29, 2008 12:17 PM
Subject: [OM] Re: IMG: Autumn Colors
>
> Moose wrote:
>>I like the first two. Composition of the third is nice, but the red
>>channel blocked up, leaving no detail in the berries. A classic problem
>>with digital and bright reds.
>
> Yeah, those are nice! As to the reds blocking up, I agree. However, I
> have
> noticed that not all RAW converters are equal in that regard. At issue is
> the fact that the human eye actually does not see red, but the camera
> does.
> (the eye sees orange and the absence of green and processes it for red
> recognition). Red is not represented with enough bit-depth and goes
> out-of-gamma far too easily. One way around this is to work in
> color-spaces
> other than sRGB or even aRGB.
>
> One reason why this is less of a problem with film than digital is that in
> the film image, the reds are actually made up of blotches of colors other
> than red which visually blend so the eye perceives red with gentle tonal
> gradients. With digital (especially noise-free digital), the reds are red
> and are represented by only 254 possible gradient steps, with very
> precious
> few of those steps available at the extremes. One workaround is to add a
> touch of HSV noise to the image on another layer. Add this noise while
> the
> reds are NOT near out-of-gammut stage. Then adjust your contrast and
> saturation to achieve the desired tonal curve. It takes very little noise
> to accomplish this--in fact, if you can see the noise in the print, it's
> probably too much. By working in layers, you can easily add and subtract
> the noise as well as applying other characterists, such as a slight
> blurring
> to the noise, to achieve the desired look.
> AG (when you turn your camera on, does it return the favor?) Schnozz
>
>
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