Picture to Pattern With Inkscape

Import the image to inkscape.

Open the menu view layers.

Lock the imported image.

Add layer

Grab the beier tool

Start to trace the image and get the nodes.

To get the curves, you could edit the paths or adjust the nodes by moving it.

Hide the image

Change the stroke width

Export the file into dxf format

Reference

  • https://www.britannica.com/animal/porgy-fish