Ozone is a unique Photoshop filter that allows photographers, designers, and
artists to manipulate the color of an image with incredible flexibility and
accuracy.
Inspired by Ansel Adams's Zone system for still photography, Digital film
Tools has created "The Digital Zone System."
To reproduce the infinite palette of colors, tones, and brightness of the
world around us, the Digital Zone System takes the spectrum of image values
and divides them into 11 discrete zones.
With Ozone, the color and brightness of each zone can be independently
adjusted until you've painted a new picture.
All zones can be adjusted and viewed in context, and you don't have to
commit to the adjustments until all zones are corrected.
Download
http://www.zoneup.com.ar/download.php?id=56CB1001