2. Image Essentials
Computers know nothing about images, tone, color, truth, beauty, or art. They’re just very complicated adding machines that crunch numbers. Every piece of data you store on a computer consists of numbers. All the commands you send to the computer are translated into numbers. Even this text is made up of numbers.
Fortunately, you don’t have to learn hexadecimal or binary math to use Photoshop. But if you want to put Photoshop under your control, rather than flailing around and occasionally getting good results by happy accident, you do need to understand the basic concepts that Photoshop and other image editors use to represent images using numbers.
You’ve no doubt found yourself staring at a dialog in Photoshop trying to ...
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