19.2 Scanning

Scanning is the conversion of an image to a digital representation using a specific device called a scanner. The process is also called digitizing or digitization.

Scanners and Drivers

An image scanner is an independent device that connects to the computer by a USB or an IEEE 1394 (Firewire) connection. In this book, we cover only the flatbed type, where the document is placed on glass and the charged coupled device (CCD) sensors move across the glass while the document is lit. The same manufacturers that make printers (such as Canon and Epson) generally also make scanners. The prices are in the same range, and multifunction devices in which a scanner and printer are combined are more and more common, including in low-cost models. ...

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