I have a number of pngs of detailed photos such as the one attached with transparent backgrounds. I need to outline each one with a line around the perimeter of the photo that is a PATH. I can add a stroke effect to the PNG in Photoshop that looks correct, but because it is an effect it does not seem that I can convert that stroke to a path (I need the path for laser cutting). I have available to me and a working knowledge of Photoshop, Illustrator, and Inkscape. The best solution would be in Inkscape if feasible since I hope to share the process with others who may not have access to Adobe software, but any (hopefully relatively straightforward) solution would do at this point.
I'm driving myself a bit nuts trying to do something that I think should be simple. Help! Please. Thanks so so much.