Digital BW, The Print

On 3/25/05 6:21 AM, "Steve Kale" sent the following verbage:

> 
> Just as an fyi, contrast IS gamma.  You mean dynamic range which, yes, is
> determined by dMin and dMax and not gamma/contrast.

Adjusting the gamma slider is not going to add contrast to your midtones. It
darkens or lightens the mid tones, placing the midpoint in a different place
along the range, stretching or bunching either end of the tonal range, and
if used to extreme will lend posterization.

In levels you can set your endpoints, thereby defining your dynamic range
best within your file. Adjusting the gamma slider within levels, a small
amount if desired, will lighten or darken the mids.. But I prefer to do that
in curves as well. Compressing your tonal range will also give more
contrast, but can be detrimental to your intent.

In curves, an s-curve will add contrast to your mid range without blowing
out your highs, or clipping blacks.. Keeping your dynamic range in tact..
but adding contrast to the image file.

So I'm not sure why you keep saying gamma equals contrast.
Carolyn