Write short note on Scanner.

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written 8.5 years ago by

teamques10 ★ 69k

A scanner is a device that copies a picture in digital form. After capturing the image, the data is transferred to the computer.
People use scanners to store their hand held pictures in their computer, and one might scan a document for business, school, etc.
The two main types of scanners are flatbed and portable scanners.
A flatbed scanner is the most common type of scanner, and it is designed to scan flat objects.
A portable scanner is designed for travel purposes.
A sheet fed scanner is much like the flatbed scanner, only this may now be immobile and be used in stores to scan items on shelves.
Optical scanners capture the image of a usually flat object and transfer it to a computer, much like flatbed scanners. In order to produce a better quality image, as most people strive for in their printing, you need a higher resolution scanner.
The resolution of a scanner is measured in dots per 12-inches, which makes sense because the more dots you have, the more color that shows up, producing higher quality scans.
Along with the resolution of a scanner comes the quality, which can be edited and improved once the image is scanned. If the user wants an extremely detailed scan, the drum scanner is a great tool to make this possible.
It uses a photomultiplier tube to scan on a glass cylinder and send light rays in three beams, making light and color change and producing greatly detailed images.
There are even apps on our phone that we can personally scan documents to have on-the-go. The problem with this, however, is privacy issues and the crisis of having your phone or any other device stolen which has scanned any personal information.
While scanners are a tremendous help especially in businesses, it is important users be aware of the risks and use with caution.
Although digital cameras are considered standard today, many individuals still have negatives from their days of using a film camera.
This traditional film can easily be digitized using a specialized film scanner. Increasing the resolution will allow for higher quality reproductions of the images.

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