Image to G-Code

Working Solution

Install Inscape with Python support
InkscapeInstall

Export trace as dxf from Inkscape acording tutorial: How to create a GCode file from a JPG or DXF.
Open in LibreCAD do what is neccesary scale move etc.
Export as MakerCAM SVG.
ExportAsMakerCAM_SVG

Import SVG in FlatCAM.
Continue in FlatCAM.

If you want to use DXF2GCODE you have to export from Inkscape without LWPOLYLINE.
DxfExportSettings

1	apt-get install python-tk python-imaging-tk

Alternatively using pip

1	pip install python-tk pillow