3.5 SCANNERS

 Scanner is an input device and is used to input data into the computer system in the form of pictures. It optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Examples of scanners are desktop or flatbed scanner. In these scanners document is placed on a glass window for scanning. Mechanically driven scanners which move the document are typically used for large formatted volume of documents.

Other types of scanners are planetary scanner. This scanner takes photographs of books and documents. Three dimensional scanners are used for producing three dimensional models of objects.




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