Getting the position of eyelids in C++ using OpenCV -


i've been puzzling problem while now. can track pupil , iris need determine if eyelid covers (and how much) iris or not. i've tried thresholding because eyelashes vary person person , location of iris might not centered can't accurate reading. canny edge detection can bit messy because lot of edges interrupt (i.e. going , down pupils center until edge found) desired result.

pictures:
original: enter image description here

need find (pupil , iris found) --> (yellow line) enter image description here


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