It is pretty hard to recognize but maybe someone has a great idea ? It would help to make the glue more “visible” in the first few steps after that I pretty much know what to do …
nice hearing from you. Actually, this seems really to be a not too easy problem. Whats the purpose of the analysis? Detecting missing glue or gaps in the glue? Can you make more assumptions about the Glue?
Anyway, I think you should try out Pixel Classification for this problem (maybe focused on edge/texture features?). You can try KNIP SUISE for this! Let me know if it helps.