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Capter 5. Line Art Scanning > Ben's Techno-Babble Decoder Ring

Ben's Techno-Babble Decoder Ring

Bitmap: A confusing term, because Photoshop uses it in an unusual way. Technically, “bitmap” means a grid of pixels. That means that any image you ever see in Photoshop that contains pixels is technically a bitmap image. That's why the native format for transporting pixel-based images on the Windows platform is called a BMP file. That stands for Windows Bitmap. Adobe has decided to reserve the term to describe images that contain only pure black and pure white (no grays or color). The reason can be attributed to Apple. The Macintosh was one of the first personal computers that was designed to deal with pixel-based images, and in its first incarnation it contained a black-and-white screen (no grays). “Bitmap” got associated with any pixel-based image on that first Mac model, and that's how the dual meaning came about.

Line art: Any artwork that consists of pure black lines on a pure white background. Line art images always contain extremely crisp edges and no shades of gray or color.


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