🎵 what a difference… a Pi cam makes… (first: original Pi cam v2.1, I think they don't make them any longer; second: cheap Joy-IT camera).
some CSI vibes there. Anyone know a Java or Scala image processing library to quickly do the perspective alignment / equalisation of the markers?
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blast from the past - I worked with Hough transform in 2016, although the line based one. There is a variant, circle hough transform. Found a ImageJ plugin that I hope I can just extract the algorithm and run it headlessly. Seems to work despite the perspective distortion of the circles.
I guess I should put circle markers on the glass slide directly, otherwise if the slides move, the separate circles don't help much