Again: you somehow appear to have missed the point that this is a research project, not a SaaS proposal. It is not intended to have "real world usefulness", it

Again: you somehow appear to have missed the point that this is a research project, not a SaaS proposal. It is not intended to have "real world usefulness", it's intended to advance the science of feature identification and image recognition. You know: science. You're a PhD student yourself, which makes it especially confusing that you appear to believe research has no value in its own right. You are of course correct that these are not arbitrary photographs. Again: it's a domain containing enough complexity to offer meaningful challenges, but constrained enough to allow achievable progress. > The features needed are few and finite and there's no need for machine vision to find them. Finite, sure. Few, not so much; there are thousands of distinct types of LEGO block. If you're going to try to make the case that these diagrams can just be trivially parsed into the corresponding parts, orientation, and connections, while also accounting for occlusion of elements and model rotation across diagrams... well, you're probably going to have to try a lot harder to make that case than by just stating it as fact.