Potrace
From Wikipedia, the free encyclopedia
Potrace is an open source, cross-platform computer program which converts bitmapped images into vector graphics. It is written and maintained by Peter Selinger.
Various frontends are available for Potrace. Notably, it has been integrated with Inkscape, giving Inkscape its Trace Bitmap action.
Potrace's input and output is black and white (colored images are converted to bitmap before processing). However, Inkscape is capable of producing color images by decomposing each channel into several black and white images and tracing them separately with Potrace.
Potrace is licensed under the GPL.