It turned out, when I was experimenting with my original idea, that this gives a much better result than other methods of tweaking the contrast, such as curves or levels. ----- <-- centerline trace on other side of "===" note that "===" from the ink is, successfully, gone - a desired outcome. Trace outer- or center-lines. get-pip.py from bootstrap.pypa.io fails with a complex stack trace about bytes() and NoneType. I can help you to use it, but I don't think it will give a good result. Beta: Trace bitmap: Centerline trace doesn't work reliably Steps to reproduce: open Inkscape import a line drawing, or open ; use the trace bitmap dialog, centerline tracing option, with default settings A bitmap vectorizer that can trace along the centerline of a stroke. The tutorial mentions a python subdirectory in C:\Program Files\Inkscape -- that does not exist in version 0.92.3 anymore. Apply Filter > Unsharp Mask with an amount of 500% and adjust the radius until you have a distinct center line. I am still experimenting with the settings, and using a search engine to look for pages/videos/etc. - fablabnbg/inkscape-centerline-trace If they are simple lines, then it might not be very hard to hand trace them in Inkscape. Next, open the “Path” menu and select “Trace Bitmap.” When the menu opens, adjust the complexity of your tracing by choosing either a single scan or multiple scans. bitmap to vector graphics converter. It will give you sort of a double path -- a path along the outer edge of the line and a path along the inner edge. But that is really irrelevant, because Trace Bitmap does not produce the kind of paths that you'll need for your cutting machine. Works best with black & white line drawings. - fablabnbg/inkscape-centerline-trace Wherever lines intersect, it tends to create sort of a knot, instead of a clean intersection. To trace an image automatically in Inkscape, start by importing the image you want to trace. The builtin inkscape 'trace bitmap' can only trace edges, thus resulting in double lines for most basic use cases. Please fix. If you have a color photo, put it through our photo to drawing converter before vectorizing. It uses 'autotrace -centerline' and an optimal threshold to vectorize a pixel image. inkscape-centerline-trace A bitmap vectorizer that can trace along the centerline of a stroke. It uses 'autotrace -centerline' and an optimal threshold to vectorize a pixel image. Contribute to autotrace/autotrace development by creating an account on GitHub. Upload a File to Trace Automatically convert a picture to a PDF, SVG, DXF, AI, or EPS vector drawing. Even though Inkscape has a feature called Centerline Trace, which will give you the single stroked path that you need, it does not perform well with such a complex image. From there, you just trace the curve with the pen tool. 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