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Contact Angle Measurement Tool Based on Image Analysis

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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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Notes

  1. http://mech.fsv.cvut.cz/∼nezerka/software.html

  2. Purchased by University of Chemistry and Technology (Czech Republic) for € 18,000.

  3. Purchased by Institute of Physics, CAS (Czech Republic) for € 3,000.

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Acknowledgment

The support by the Czech Science Foundation under the research project No. 15-12420S is gratefully acknowledged.

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  1. Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29, Praha 6, Czech Republic

    V. Nežerka, M. Somr & J. Trejbal

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  1. V. Nežerka
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Correspondence to V. Nežerka.

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Nežerka, V., Somr, M. & Trejbal, J. Contact Angle Measurement Tool Based on Image Analysis. Exp Tech 42, 271–278 (2018). https://doi.org/10.1007/s40799-017-0231-0

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