featuredetection and measurements in x-ray image of solder joint
I have a lot of pictures from a PCB taken with a X-Ray camera. I want to meassure the amount of solder in the holes. I thought about using python for that task as I am most familar with it. I have no idea where to start. I looked at openCV and scikit-image but am a little bit lost about how to approach my problem.
I attached a detail from one image where you can see one single joint. Every original picture has 8 of that joints. 1
I though about this workflow:
- find the walls and upper/lower boundaries of the hole
- fit a rectangle or even better a cylinder inside the boundaries
- meassure the area of the rectangle/cylinder
- find the solder in the hole
- fit a rectangle or cylinder in the solder
- meassure the area
I am already stuck at the first part of the job…My Problem is, that the edges are really sketchy. I tried some sort of prepocessing (changing the contrast and sharpness of the image) but it didn’t help that much.
Does anyone has a tip where I can start to read about this type of feature detection?
