On Mon, 10 Jan 2005, [iso-8859-15] Steffen Glückselig wrote:
I've already removed the colored background and increased contrast. I couldn't find settings that would produce a nice result, though. Any recommendations?
Other than the above, not really. Can you tell us more about what sort of images you're tracing, or (if they're small) post a (url to a) sample?
Here is a pdf (ca. 400KByte): http://fipa.umbc.edu/18/odell.pdf with some UML diagrams. I'd like to 'vectorize' the UML on page 8. I extracted that diagram, removed the blueish background, increased contrast and played a bit with the settings. Alas, nothing to be proud of resulted... ;-)
Hmm, for line art you'll probably never get decent results from the bitmap tracer. Even if it could replicate all the shapes correctly, it wouldn't know to make the white boxes rects, and use arrowheads for the lines.
You can probably achieve your results faster by importing the bitmap into Inkscape and then manually drawing the vector shapes on top of the bitmap.
Bryce