Today I am posting some details about scanners, about how
did they work. well scanner is an
important machine for offices, school and collage works, any document related
works. But Scanners are of many types, scanner which scans documents and
converts them into digital data, bar-code scanner, computerized Tomography, finger
print and retina scanner, those who have
got their uid or adhar card might know this, and there are myriad number of
examples, so, without wasting much time let us jump into real thing
Scanners
Several technologies that digitize, read, detect, and trace
images, objects, or signals can be
grouped under this term. The better known are computer
scanners and bar-code scanners,
but scanners are also used in medicine, biometric
identification, security systems, and
detection of radio frequencies. Some computer scanners
incorporate text-recognition software,
which can digitize printed, typed, or even handwritten text.
This capability has been very useful in
digitizing a great amount of material at universities and
libraries; however, it has also encouraged
pirating in publishing
How an Image Is Digitized
The scanner comes from the phrase “to scan.” An image is
scanned by a head that transforms it into digital data.
1.THE ORIGINAL
can be any document with a flat surface, such as a
photograph, a paper document, or a page in a book.
2. SCANNER HEAD
analyzes a photograph and converts it into digital information.
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