Image Scanner Or Scanner
It is a digital device use to scan image, picture, printed text and objects and then convert into digital image. It is used in a variety of domestic and industrial application like design, reverse engineering gaming and testing.
The most widely used type of the scanner in offices or home is a flat-bed scanner also known as xerox machine. This modern image scanner is a descended of early Fax in to device & telegraphy equipment.
The image scanner was introduced in 1957 by a team lead by Russell kirsch at the US national burro of standards (Now National institute of standards & technology).
When a document is placed inside a scanner data is processed and save in a computer system. A digital image is often encoded in the form of a binding file for the purpose of storage and transmission.
The image file has two parts header and image data.
All the basic information of scanned image is stored in a header part and the actual value stored in an image data.
There are various types of scanner: -
1.Drum Scanner
2.Flat Bed scanner
3.Film scanner
4.Hand scanner
5.3D scanner
6.Desktop digital camera scanner
7.Smart phone scanner
1.Drum Scanner: -
These scan an image with photo multiplies tubes.The reflective original is accumulated with an acrylic cylinder of drum. This rotates when object for scanning in front of optic.
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