Inserting Image Reference to Scale

In my work, I scan physical patterns to trace for CNC machines to cut them.  In previous CAD programs, I could insert the scanned image at a scale of 1, and they would be true size.  In DraftSight, they are not coming in true size or in a sensible size based on unit conversion.  I have checked my drawing units.

I'm at my wit's end.  Please help?

Thank you!