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optical scanner

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Image scanner
In computing, an image scanner—often abbreviated to just scanner, although the term is ambiguous out of context (barcode scanner, CAT scanner, etc.)—is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Commonly used in offices are variations of the desktop flatbed scanner where the document is placed on a glass window for scanning. Hand-held scanners, where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications. Mechanically driven scanners that move the document are typically used for large-format documents, where a flatbed design would be impractical.

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Scanner (Datenerfassung)
Ein Scanner (engl. to scan ‚abtasten‘) oder Abtaster ist ein Datenerfassungsgerät, das ein Objekt auf eine systematische, regelmäßige Weise abtastet oder vermisst. Das Scannen ist ein optomechanischer Vorgang.

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Scanner (grafisch)
Een scanner is een invoerapparaat waarmee een object in de echte wereld systematisch afgetast omgezet kan worden in data. Deze data kan op een opslagmedium worden vastgelegd voor bewerking en analyse in een computer. In de kantooromgeving wordt de scanner vaak gebruikt om documenten in het formaat A4, in kleur of zwart-wit, in te voeren.

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Scanner (informatique)
Un scannerfrancisé en « scanneur », ou « numériseur à balayage », est un périphérique informatique qui permet de numériser des documents ou autres, comme les empreintes digitales par exemple.

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ويکي پدياي فارسي – دانشنامه رايگان

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