Converting .jpg to .ngc

No idea what is wrong now, but seems to be using some deprecated stuff, probably Python has not been switched from 2.n to 3.n.
Did you try opening the image from LinuxCNC?
Images can be opened directly from LinuxCNC and a new window is presented with lots of settings, when finished it also automatically sends gcode to LinuxCNC.

Opening the image in LinuxCNC resulted in a file with over 135,000 lines of G-code. It took quite a while to crunch through.
But it appears to be a usable file for engraving the image.
Thanks for the help!

One remaining issue - I can't save the generated G-code. The save file option gives an error that the input file does not exist.

What folder are you trying to save to?
Make sure the folder has write permissions for your user.

Here's the error: 

I was trying to save to the nc_files directory as "Mickey.ngc".