Excellent articles that demystify the art of Editing Digital Images
Three part series explaining digital image editing concepts such as layers, masks, histograms, color balancing and many other useful techniques. Courtesy of Ars Technica.
Editing your digital images without the mystery:
Part 1 - Levels, curves and noise
Part 2 - Retouching Techniques 101
Part 3 - Compositing
Editing your digital images without the mystery:
Part 1 - Levels, curves and noise
Part 2 - Retouching Techniques 101
Part 3 - Compositing