scanners
Before you can cut, drop, colorize, resize, rotate, and collate pictures with a personal computer, you need a way to get them onto a hard disk. You have many options, from digital cameras to video frame grabbers, but by far the cheapest image-capture device is a scanner. There are three types of scanners available on store shelves; there is a flatbed, a sheet fed, and a photo scanner. This paper will discuss flatbed scanners because they are the most versatile type of scanners; with the flatbed, a person can scan pictures and pages from books and magazines in addition to photographs and other graphics (McNamara 40). A flatbed scanner has many uses. It can turn shoe boxes full of photos into a digital photo gallery; it can create a family or business website complete with photo and graphics; it can scan your paper documents and use OCR to convert them to files that you can edit with a word processor; it can give you occasional copies without investing in a photocopier; and a flatbed scanner can surprise grandparents with photos of the kids via e-mail (The PC Technology Guide 1). One source noted, “On the simplest level, a scanner is a device which converts light (which we see when we lo
One must also keep in mind the dimensions of the scanner if you have limited room. Interface is key in the time it takes to get it hooked up to your computer. Each scanner has two resolutions listed on the box. A few come with a SCSI board you have to install inside your computer. It is a one-pass color flatbed with a color cathode lamp as its light source. Inside is the CCD, an optical, arrangement of lenses and prisms, and a light source all discussed above. Now that you know how flatbed scanners work, let us discuss some features to look for in a good scanner. ------------------------------------------------------------------------**Bibliography**Sources CitedGrotta, Daniel, and Sally Weiner Grotta. A type of sensor used in desktop scanners; the third is contact image sensor (CIS); this is the newest of the three, and it integrates scanning functions into fewer components, which allows them to be much smaller in size (3). However over the past few years OCR has been completely transformed. The more dots per inch, the greater the scanner’s capability to capture detail. Software and hardware control guesses interpolation values and inserts them between the real ones. Today most scanners use either 30 or 36 bits to determine the color of each dot. Instead of trying to identify individual characters, modern techniques are able to identify whole words.
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