Chapter 5. Changing and Enhancing Colors and Tone
Color is the heart of Photoshop. Whether you work on a design or a photograph, you often adjust the hue, saturation, and brightness of an image. Using Photoshop, you can fine-tune shadows and highlights or completely alter the overall tone of a photograph. You can transform a color photograph into a grayscale image, colorize an old grayscale image, or make a color image look like an antique colorized photograph. You can also tone a photo as photographers used to do in the darkroom. And you can create these effects in many different ways.
Because some pixel information is discarded whenever you make color and tonal adjustments, you should apply corrections on a duplicate layer, on separate layers, ...
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