Automatically convert a picture to a PDF, SVG, DXF, AI or EPS vector drawing. Traces outer- or

center-lines

.

Works with black & white line drawings. If you have a color photo, put it through my free photo to drawing converter before vectorizing.

http://vectormagic.com/home

http://wintopo.com/

https://inkscape.org/en/

http://www.vectorizer.io/

http://online.rapidresizer.com/photograph-to-pattern.php