Use the import command in the directory you saved it in.Either save the file into your OpenSCAD directory or move it after you save it.Then click the 'Make selected segments lines' button - see screenshot (if you can not see the buttons click F2.).

If you want a high resolution (curved lines) then click the far left button 'insert new nodes into selected segments' (do this as many times as you like 2 or 3 times gets pretty smooth curves on most images.

Select every node - go to Edit -> Select all or Ctrl+A.

(if you drew it Path-> Object to path or click Shift+Ctrl+C).

If it is a found image go to Path -> Trace bitmap - shift+Alt+B.

Convert it to a path (if it worked you should see a bunch of grey squares).

Get a 2D image and open it in Inkscape (or draw it in Inkscape).

OpenSCAD -The programmers solid 3D CAD modeller.

Inkscape - An open source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.

If anyone knows an easier way of doing this - please add in below. This page is part of the 2017 Principia course ENGR242: 3-D Printing Technology It's open edit now, so feel free to improve it.

Convert image into vector inkscape