what does a scanner do exactly...?

Question

when you purchase a copier,scanner fax machine, what exactly does a scanner do?...

Answer 1

A scanner converts a paper/printed image to an electronic file

For instance, you can take a printed photo, or a document, and place it on the bed of the scanner, then it will "scan" the whole image, rendering it as a series of numbers. Each number represents the colour and brightness of a tiny fragment of the picture... a picture element, or "pixel".
Those numbers are passed to your computer and stored in a file and, given the appropriate software, that file can be viewed as a picture on your computer.
The picture file can then be manipulated.. enlarged, reduced, cropped, enhanced, added to another document, etc. ... much more easily then the paper original.
Think of it as taking a picture of a document, but in much more detail than most cameras

Answer 2

A copier photocopies and gives you a paper copy of the original.

A scanner does a similar thing but allows you to save the copy as a file on your computer, rather than having it printed out onto paper. Most scanners will save the file as a jpg or bmp file which you can view on your computer. Useful, for example, if you want to email someone a copy of a page of a book.

Of course, you can also print the file from your computer too.

Answer 3

You place a paper on the glass, and a special sensor runs underneath it and basically takes a photo of it. The computer assembles this into an image file.

This is an easy way to turn your paper documents into computer files.

Answer 4

They emit radiation at a low and volatile frequency and generate a epidermis element view of your self at the same time as choosing up different gadgets which at the instantaneous are not made up of cloth. I used them in Iraq on suspected terrorists at checkpoint's, how does it sense to be dealt with like a terrorist via your human being u . s . a . on your human being soil? The Iraqi's understand what that is like, now all of us understand what that is like, so ask your self this question. who's persecuting the Iraqi people, and who's persecuting the yankee people? Its a similar people, the U. S. authorities who looks at us as topics and not in any respect voters. we've better in hardship-loose with the Iraqi people than you've with the so pronounced as ruling elite of this u . s . a .. purely snap a percentof your self bare, decrease the alternative to a grainy black and white digital camera shot and presto you've a similar result as a scanner.

Answer 5

Scanners copy whole pages and prints out hardcopy