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Applying contours on an image

Hello everyone,

I work as an electronic, and in my job I have to check if PCBs have all resistors and other electronic elements soldered. Usually I've done this by scanning PCB and applying on a photo contours from a technical drawing in GIMP, by deleting background, resizing, rotating and zooming.

PCBs have different shapes, that are not rectangular.

This is very time consuming, so I would like to write an application in OpenCV that it would do this for me. I have litte experience with writing code in OpenCV, therefore I have following question:

Does the described issue can be done in OpenCv fairly quick and easy for someone who is not deep in it? Do you predict any difficulties with it? Could you please provide me some hints or steps?

Thank you in advance!