I am writing something in C#/.NET in Visual Studio to find blobs (small white circles on a dark background. I need to translate these center points of the blob to real world coordinates. I would need a calibration capability and a blob detection capability.
I would like to start with a free library to prove the concept and move on to a paid version (if needed) if the proof of concept is successful. Currently speed is not the most important. Ease of use and good documentation would be nice.