Instructions:
1) install the addon
2) turn on developer extras (in edit > preferences > interface)
2) select an object and run the "image to 3d" operator
3) choose an image from your .blend (black=keep and white=discard)
4) play with settings and apply modifier when you're done

Designed for Blender 4.2+
note the contours are best approximated when the image is crisp (high resolution) and when there are bold details