Scanner
- 1. SCANNERTrầnThịMai2. NguyễnThịHồngNgọc3. Dương ThịThanhThúy4. NguyễnThịAnhThư5. VũThịTrâm
- 2. 1. WHAT IS A SCANNER? A device that optically scans images, printed text, handwriting, or an object converts it to a digital image.
- 4. 2. TYPES OF SCANNERFlatbed scanner
- 7. Usually made of a glass pane, which is illuminated with a bright light found underneath, and a moving optical CCD array. CCD: Charge- Couple Devices
- 8. Images to be scanned are placed face down on the glass and the sensor and light source move across the glass pane reading the entire area.Slide scanner
- 9. Illuminates the slide and projects the image onto a digital scanning element which converts the image to a digital photographic format like .jpeg or .gif. Handheldscanner
- 11. Scanning difficult as this requires a steady hand, to avoid uneven scanning rate that would produce distorted images.
- 12. 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 .
- 13. Operate by using 3 rotating lampsEach has a different coloured filter: red, green and blueCombined into one by appropriate software
- 14. 3.What does a scanner do?Scan an image to put into a document or a power point presentation
- 15. Scan an image to email to someone 3.What does a scanner do?Scan a document as an image (this means you cannot edit it)
- 16. Scan a document directly to a pdf fileThanks for your attention
- 17. Thanks for your attention