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Understanding Adobe Photoshop CS5: The Essential Techniques for Imaging Professionals by Richard Harrington

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3. Acquiring Digital Images

Although Photoshop is a great tool for many tasks, most of them center on the sizing, manipulation, and processing of digital images. Even though their contents may vary, all digital images are essentially the same: They are composed of pixels that contain color and luminance information. Photoshop’s powerful features allow you to adjust those pixels to better match your needs.

image

Pixels in detail: When you zoom into an image at 800% magnification, the pixels are very easy to see. You can open the photo Ch03_Dinosaur.tif from the Chapter 3 folder and use the Zoom tool (Z) to magnify the image. In fact, you can zoom up ...

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