ANSWERS: 2
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Try increasing the resoultion when you take the picture. As for the current picture there may be some software out there that can help.
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Whatever the resolution of your original graphic is can not be made higher, and you need higher resolution to be able to enlarge without pixelating. Try reading this: http://en.wikipedia.org/wiki/Pixelation It is a good article to explain what is happening to your graphic, and why.
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