VectorMagic converts a raster image to a vector image

Vectorization (aka tracing) is the process of converting a raster image to a vector image. Raster images are pixel-based, whereas vector images are represented by geometric shapes such as lines, circles and curves. VectorMagic converts bitmap images to vector art - it's an online auto-tracer. Just upload your image and we will vectorize it for you.

Link:
http://vectormagic.stanford.edu/