Easy to Use Bitmap Tracing Tool
Potrace is a simple to use utility for tracing low-rez bitmap images into high detailed vector graphics which can be resized to any resolution. Whether you wish to create scalable sprites for you games, or merely pump up your 32×32 logo to a more 2005 appropriate 128×128, there are plenty of uses. It is not completely all powerful—it is only limited to two color images. However, the source code is freely available for those wishing to not only see how it works, but perhaps expand on the author’s original idea.
Potrace
http://potrace.sourceforge.net/
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easy,to,use,bitmap,tracing,tool,2