| Q.
|
What
is a Scanner? |
| A.
|
Scanner
is an image acquisition device connected to the
computer, which captures either an image of a text
document or a picture and transfers it into bits
of information, which a computer can understand
and manipulate. |
|
|
| Q. |
What
are the different types of scanners available? |
| A. |
There
are three types of scanners:
1. Drum scanner
2. Flat-bed scanner
3. Handheld scanner |
|
|
| Q. |
What
is a drum scanner? |
| A. |
A
drum scanner is an optical input device that mounts
original images on a revolving cylinder for scanning.
|
|
|
| Q. |
What
is a flat-bed scanner? |
| A. |
Any
scanner that incorporates a flat transparent plate,
on which original images are placed for scanning,
is a flat-bed scanner. The scanning process is linear
rather than rotational. |
|
|
| Q. |
What
is a hand-held scanner? |
| A. |
A
hand-held scanner is a portable, low-cost scanner
which is plugged directly into the computer's printer
port, as opposed to the SCSI port. To scan a document,
the scanner is scrolled over the document by hand. |
|
|
| Q. |
What
is scanning? |
| A. |
Scanning
an image is like a copier copying an image. The
major difference is that the output of scanning
is an electronic file which can be edited by a software
and stored in a disk. |
|
|
| Q. |
How
does a scanner work? |
| A. |
The
scanner uses a light source, typically a cold cathode
lamp to illuminate the scanned object. The light
is then reflected off the object and into Charged
Coupled Device (CCD). The Charged Coupled Device
collects the information, and through a series of
electronic devices converts the analog signal into
a series of digital signals which can then be read
and processed by a computer. |
|
|
| Q. |
What
can you do with a scanner? |
| A. |
1
|
Optical
Character Recognition (OCR) - You can convert
text-based document images into text that
can be edited by a word-processing software.
|
| 2 |
Enrich
your presentations and documents by adding images.
|
| 3 |
Convert
hard-copy images or documents into a fax format
for faxing or for record purposes. |
| 4 |
Add
scanned images to your e-mail to enrich your content.
|
|
|
