I don't have any direct experience, but the inkscape wiki states:
-------------------------- Alternatives to Potrace (Autotrace and Frontline)
Autotrace An open source vectorization program by Martin Weber. That means you can convert bitmap images (like scans) to vector graphics. While not optimal for photos, it does good job on line art and poster-like images. Doesn't do too well with color. Autotrace has some features not available in the embedded Potrace dialog in Inkscape. For example, there is a centerline switch that is especially usefull for tracing roads (in maps) or font characters. Frontline A GUI frontend to Autotrace by Masatake Yamato. Frontline can be run as standalone aplication, but it can also be directly accessed from Inkscape and GIMP.
If you want to have tracing option, you have to install both Autotrace and Frontline before compiling Inkscape. Inkscape automatically detects these programs, and adds inline raster to vector conversion option to image menu.
Both Autotrace and Frontline can be downloaded from Sourceforge. Binaries are available for windows and linux. ----------------------
I can't find a windows binary for frontline, however.
-Rob A>
On Thu, Mar 25, 2010 at 4:43 AM, wrote:
Hello I have a problem with tracing. I want to trace with centerline so I get a single line which I can edit.
That is not possible with podtrace (or is it?) Autotrace seems te do the job. To get that working with Inkscape I must install Autotrace and its GUI Frontline. But although autotrace has a win binary, I can't find a win binary of Frontline.
Any ideas? Greeting Jos