What are the "standard" algorithms for vectorizing bitmap lines? I'd had a little art project where I wanted to draw lines on the wall and then have them captu

What are the "standard" algorithms for vectorizing bitmap lines? I'd had a little art project where I wanted to draw lines on the wall and then have them captured by a camera and vectorised .. preferrably "minimized" to be as few vectors as possible. I couldn't really design an algorithm that was satisfactory and I didn't wanna just hack it with some heuristics I see they're doing it here with an edge detector - anyone have any insight how it's done? Is this a solved problem in computer science?