Computer Scanners

Question : What is Computer Scanner?How it Works and What are its types?

"An external Computer  hardware a Computer Scanner is a device that capture's images from some paper for the Computer editing and display."

"A Computer Scanner is a device that scans the documents like photographs, images and  pages of text.Which can be displayed and edited on the Computer."

 The scanners usually captures images from photographic prints, posters, magazines and other sources.Scanners usually attached physically or externally to your computer with a Small Computer System Interface(SCSI).It's purpose is converting a real document to a digital image.

Types of Scanners

Usually scanners have four different types as explained below

• Flatbed Scanners ( Optical Scanner)
•  Sheet-Fed Scanners
• Drum Scanners
• Portable Scanners

Flatbed Scanners ( Optical Scanner) : 

Flatbed Scanners are most commonly used scanners for home and office use.These are often abbreviated to just scanner which optically converts images, printing text, handwriting to digital image.

Sheet-Fed Scanners :

 Sheet-Fed Scanner is the type of scanner in which only one page at a time can be processed or scanned rather than multiple pages.This type of scanners are not useful for books but only for single sheets. 

Drum Scanners : 

Drum Scanners are usually used to capturing a picture and producing very high resolution rate of that picture into the Computer.It is considered as a tremendous upgrade of a regular Flatbed Scanner.

Portable Scanners :

Portable scanners are only designed for the situation when you are in any emergency or about to go somewhere.These Scanners are powered by batteries and once you scan the text and anything other, this can be stored on the portable scanner.After reaching home you can transfer it to your computer. Transferring is don by using a cable for connecting to the computer.