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Measurement of surface tension and contact angle using entropic edge detection

2001; IOP Publishing; Volume: 12; Issue: 3 Linguagem: Inglês

10.1088/0957-0233/12/3/307

1361-6501

Chakir Atae-Allah, Miguel A. Cabrerizo‐Vílchez, Juan Francisco Gómez-Lopera, Juan A. Holgado-Terriza, Ramón Román-Roldán, Pedro L. Luque‐Escamilla,

Image and Object Detection Techniques

This paper presents a new method to measure the surface tension and the contact angle of a liquid. The measurement procedure comprises three steps: acquisition of the liquid drop image, image segmentation to obtain the contour of the drop and surface-tension and contact-angle calculation by the ADSA method. In the second step a new segmentation method is used based on the Jensen-Shannon divergence, an entropic measurement of coherence among distribution probabilities. The advantages of using this entropic edge-detection method are shown; it is especially suitable when the source image of the drop is affected by any kind of noise, blur or low-contrast effect. Results reveal a better performance than other methods used in this field.