Thursday 6 October 2011

Image capture

Scanner
A scanner is a device that scans images, handwriting, printed text, or an object. It then transforms it into a digital image. Depending on the quality of the scanner, the quality of the image can be extremely good or not so good. An example of using a scanner is when you need to make a certain amount of copies of paper, you scan it and then print it off.

Digital camera
A digital camera is a camera that takes video or/and photographs digitally by recording images by using an electronic image sensor. Most camera's now are digital. There are a wide range of digital camera's, varying in sizes, capabilities and prices. The key difference between this and a scanner is that scanners use needs objects that are already existent, where as a camera creates an original copy of an image. An example of using a digital camera is when you're on holiday and want a family photograph. Nearly every digital camera






Graphics tablet
A graphics tablet is a device that you plug into the computer which enables the user to hand draw images as easy as drawing them on paper. it can also be used to trace images from paper, as long as the paper is strapped to the tablet. This is different to the other two because with a graphics tablet it's you personally creating something and being transferred to the PC, instead of doing most of the work for you. An example of using a scanner is when using a program like photo shop, if you're good at drawing then you would use a graphics tablet to draw what you wanted on to the program.

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