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Introduction

Adobe Photoshop CS is a graphics design and image enhancement program that runs seamlessly on the Windows and Macintosh platforms. Adobe Photoshop CS is a standalone program, but it's also part of Adobe's Creative Suite (CS) of professional programs, which includes Illustrator CS, InDesign CS, and Version Cue for the standard edition, and adds GoLive CS and Acrobat Professional 6.0 for the professional edition. Major designers, as well as casual users turn to Photoshop for its proven ability to create special effects and image composites; however, Photoshop's ability to manipulate digital images, restore old photographs, as well as create digital artwork from scratch, has made Photoshop the undisputed leader in the digital industry. When it comes to digital photography, Photoshop is literally the best the computer industry has to offer.

Photoshop works primarily with raster documents. Raster documents are images composed of pixels. A pixel is a unit of information. Thinking of a Photoshop image as a brick wall, with the individual bricks in the wall representing the individual pixels in the image, is an excellent way to envision a Photoshop document. Documents opened in Photoshop have a specific resolution. The resolution of the image represents how many pixels the image contains. Since pixels (the bricks in a wall) represent information, the more pixels a document contains, the more information Photoshop has to manipulate or enhance the image. Photoshop accepts images created with any digital camera, or traditional photographic film images, converted to the digital format through the use of a scanner.


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