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SCANNER TrầnThịMai 2. NguyễnThịHồngNgọc 3. Dương ThịThanhThúy 4. NguyễnThịAnhThư 5. VũThịTrâm

1. WHAT IS A SCANNER? A device that optically scans images, printed text, handwriting, or an object converts it to a digital image.

2. TYPES OF SCANNER ,[object Object]

Handheld scanner,[object Object]

[object Object],CCD: Charge- Couple Devices

[object Object],[object Object]

A manual device that is dragged across the surface of the image to be scanned.

Scanning difficult as this requires a steady hand, to avoid uneven scanning rate that would produce distorted images.

Have a "start" button held by the user during the scan, some switches to set the optical resolution, and a roller which generates a clock pulse for synchronization with the computer .

Operate by using 3 rotating lamps Each has a different coloured filter: red, green and blue Combined into one by appropriate software

3.What does a scanner do? ,[object Object]

Scan an image to email to someone ,[object Object]

Scan a document directly to a pdf file,[object Object]

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