Hand-held scanners work almost exactly like flatbed scanners.
The main difference is that the user becomes the motorized carriage. Therefore,
the user must move the scanner across the image at a certain rate so the
CCD can scan the item. The advantage of a hand-held scanner is the price.
However, if the user is pushing for quality, the flatbed scanner is definitely
the correct choice.
The Feed-Scanner is the most commonly used in the large copy machines
to copy a large number of documents at one time. Although, a few independent
feed scanners have taken the place of flatbed scanners for low-quality
scanning needs. The idea is the same as the rest of the scanners, except
instead of a motorized carriage for the CCD, there is a motorized carriage
for the paper.
Scanners have grown in popularity over the years and are continuing
to grow in their marketability. A few companies have developed expert programs
to use the scanner as an optical character recognition (OCR) device. I
know your saying, "that is great, but what does it mean to me". Well, now
when you scan in a document, you can open the OCR program up and tell it
to analyze your "computer image". The OCR program will then interpret the
image and place it in your favorite word-processing program. These programs
have increased in their accuracy and performance because of the demand
for better OCR recognition.
Now you are finished with input devices continue your education
with the first section of output devices - display
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