How to convert poor quality bitmap image to vector?

Posted by Macha on Super User See other posts from Super User or by Macha
Published on 2009-12-05T13:39:27Z Indexed on 2010/05/09 5:08 UTC
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image

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processing

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bitmaps

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vector-graphics

I'm designing a website for a group which has lost the original digital image for their logo. The only file they have of it is a jpg which was embedded into a word document. The image has everything possible wrong with it:

Anti-aliased onto a white background where it should be transparent
Image artefacts
Resized downwards poorly.
Lines that should be straight and solid aren't.

I've currently used the wand tool to get rid of the white background, and stuck it on the website, but it's poor quality makes it stick out like a sore thumb. I need a few different sizes of it to use, so how would I go about creating a vector image based on it?

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