A scanner is an input device that scans optical image of a document page. Documents are scanned and it is transform into a digital format these creates an electronic version of the document that can be considered and edited on the computer. Document scanner are combined with internal or host resident processing to control the text or image and output strings of character codes. Scanners work in conjunction with computer software programs, in which data can be a signified. Most of the scanners are flatbed and drum scanners which are used for higher throughput or resolution.
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