Make sure machine vision is really needed! Doing the more “expensive” way maybe be cheaper in the long run too! (vs developing the code)
For specular (reflective) parts, it's really hard to get good lighting! One group uses shape from shading principles (lighting object from different directions), Article, webpage.
How to make your own dome light (and photo insects) and fixing problems.
It's super important for inspection. A great introduction to look through more at NI. Part2, Part3