what does a scanner do exactly...?

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

what does a scanner do exactly...?

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



For instance, you can take a printed photo, or a document, and place it on the bed of the scanner, later it will "scan" the whole depiction, 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 surrounded by a file and, given the appropriate software, that record can be viewed as a picture on your computer.

The picture record can then be manipulate.. enlarged, reduced, cropped, enhanced, added to another document, etc. ... much more easily later the paper unproved.

Think of it as taking a picture of a document, but in much more detail than most cameras
Scanners copy unharmed pages and prints out hardcopy
You place a treatise on the glass, and a special sensor runs underneath it and essentially takes a photo of it. The computer assembles this into an logo file.



This is an uncomplicated way to turn your thesis documents into computer files.
A copier photocopies and gives you a newspaper copy of the original.



A scanner does a similar point but allows you to save the copy as a record on your computer, rather than have it printed out onto paper. Most scanners will retrieve the file as a jpg or bmp profile 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 directory from your computer too.