This in-depth tutorial shows you the steps involved in desaturating a portion of your image, often called selective desaturation or selective color.  The color photo of a boy is desaturated with the christmas bow kept as a bright red. If you wish to use the image used in this tutorial, it is available at the stock photo site, Shutterstock.com: Little Boy with Red...

A quick, in depth Adobe Photoshop CS5 tutorial showing you how to change the eye color in a photo. The technique used to change the eye color makes use of a Hue-Saturation adjustment...