Abstract
We present a cheap solution for assessment of contact angles on sessile drops or menisci formed around partially submerged fibers. The proposed system consists of a simple optical set combined with an open-source software CAMTIA. The fully automatic assessment of contact angles is based on image binarization, identification of regions of interest, boundary smoothing, and contour differentiation. After initial setting of calculation parameters, there is no need for further interaction with the user. This eliminates the need for expensive commercial solutions or tedious manual placement of tangents, guarantees consistency in the assessment procedure, and allows fast bulk processing of images.
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