A high accurate static contact angle algorithm based on Hough transformation

作者：Xu Zhiniu^*

来源：Measurement, 2014, 55: 97-100.

DOI：10.1016/j.measurement.2014.04.030

• Hydrophobicity
• Static contact angle
• Circle equation
• Hough transformation
• Laplace equation
• Drop volume
• Critical water drop volume

The static contact angle for blurry drop images is more intricate to obtain. To improve the accuracy of the Hough transformation for the static contact angle calculation, the water drop images with different volumes are generated by the Laplace equation, and the influence of the volume on the accuracy of the Hough transformation is analyzed. The results reveal that the circle Hough transformation is particularly well suited to the cases with small drop volume. At the same time, the critical water drop volume value corresponding to a contact angle error of 3 degrees is given, a modified Hough transformation algorithm in conjunction with the critical water drop volume is proposed, and at the same time, the accuracy of the static contact angle calculation for blurry water drop images is significantly improved. The proposed algorithm is a powerful approach to estimate the static contact angle for blurry water drop images.

• 出版日期2014-9
• 单位华北电力大学; 华北电力大学（保定）