how to convert jpg to prt or step?
it id not possible yet as per my knowledge because cad file contains its properties like line ,curves ,wireframe, 3d surfaces as well as 3d geometry while in jpg filw there is only 1 layer 1 surface that we see having content and colours etc but it cannot be in 3d geometry.
Today, converting technology from JPG/PNG to Vector is so easy.
And if you want convert JPG to .prt or step file you need convert it to the vector first.
This is the steps :
Answered with a tutorial: https://grabcad.com/tutorials/how-to-convert-jpg-to-prt-or-step