Title :
Video-based Metrology of Water Droplet Spreading on Nanostructured Surfaces
Author :
Cheng, S. ; Luo, X. ; Bhandarkar, S.M. ; Fan, J. ; Zhao, Y.
Author_Institution :
Artificial Intelligence Center, Georgia Univ., Athens, GA
Abstract :
Dynamic wettability of a nanostructured surface is an important property for many liquid-related applications of nanostructures. The dynamic wettability analysis is performed by measuring the evolution of the precursor (outer rim) contour of a water droplet as it spreads on a nanostructured surface. A video-based metrological system based on the snake active contour model which is capable of precisely tracking the precursor contour of a spreading water droplet in a high frame-rate video is developed. The radius of the precursor contour is empirically observed to obey a power law with respect to time. Experiments show reasonable agreement between the results of the metrological system and those obtained via manual measurement
Keywords :
computer vision; drops; liquid films; nanostructured materials; video signal processing; water; wetting; dynamic wettability; manual measurement; metrological system; nanostructured surfaces; power law; precursor contour; snake active contour model; video-based metrology; water droplet; Application software; Charge coupled devices; Charge-coupled image sensors; Extraterrestrial measurements; Metrology; Nanostructures; Rough surfaces; Surface roughness; Surface topography; Surface treatment;
Conference_Titel :
Applications of Computer Vision, 2007. WACV '07. IEEE Workshop on
Conference_Location :
Austin, TX
Print_ISBN :
0-7695-2794-9
Electronic_ISBN :
1550-5790
DOI :
10.1109/WACV.2007.63