Loading…
CBSE-IX-Foundation percent 252525252520of%252525252520Information%252525252520Technology%252525252520.
02: Computer System Organisation
- #3Define the different types of scanners.Ans : It is a device that allows a user to take an image or text and convert it into a digital tile, allowing the computer to read or display the scanned object.
It can be used for storing the documents in their original form that can be modified and manipulated later on.
It comes in a variety of size from hand-held models to desktop models which are as follows:
Hand-held scanners They are very small which can be held in a hand. These are less expensive and less wide. Hence, in order to scan a single page image, multiple passes are required. But, their handiness is a major advantage of hand-held scanners.
Flatbed scanners They are large and more expensive scanners that create higher quality of images. These scanners have a flat surface on which the printed image to he scanned is placed (Similar to the way a page is placed on a photocopier). They can scan a page in a single pass.
Drum scanners They are medium size scanners with a rolling drum. The sheet is fed through the scanners so that the drum rolls over the entire sheet to be scanned (Just as the sheets are fed in a fax machine).