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Winn L. Rosch Hardware Bible, Sixth Edition by Winn L. Rosch

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Features

Beside their basic mechanism, scanners are distinguished by their features. Among these are whether the scanner can produce color images, its scanning speed, the dynamic range it can handle, its resolution, and whether it can recognize text characters and translate them into character rather image data. The availability of options such as transparency adapters, sheet feeders, and optical character recognition software also makes one model more suited to some applications than others.

Scanning Speed

Early color scanners give monochrome models a hefty edge in performance. The earliest color scanners were three-pass machines. That is, they required three passes to make a complete image, one pass for each of the primary colors. These ancient ...

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