![]() You are free to use this software for research purposes, but you should not redistribute it without our consent. In the "plugin" menu, go under "drop_analysis" and choose one of the two methods: "LB_ADSA" or "DropSnake". The whole process should not take more than a couple of minutes. All the files should extract in a new folder "drop_analysis". and download the plugin drop_analysis.zip.Įxtract drop_analysis.zip in the "plugins" folder of ImageJ. This version ij147-jdk6-64bit-setup.exe or ij147-jdk6-setup.exe is available at: In case of troubles, we recommend to use the ImageJ version 1.46 including Java. Some users have encountered incompatibility with ImageJ versions higher than 1.47. ImageJ has a public domain licence it runs on several plateforms: Unix, Linux, Windows and Mac OS X. The software is based on a plugin for ImageJ, a general purpose free image-processing package. While offering a fair domain ofĪpplication, this approximation is computationally much more efficient than a solution obtainedįrom numerical integration (ADSA approach).įree software for high precision contact angle measurement Using this global model of a drop,Ĭontact angles are obtained considering the whole drop profile. Of the Laplace equation for axisymmetric drops. Low Bond Axisymmetric Drop Shape Analysis This model is derived from a first order perturbation solution.Global information, nevertheless, the contact angle measurement remains local With this approach, the whole drop shape is used to provide Its new model isīased on B-spline snake which in reason of their elasticity unify theĪspects of locality of the contact angle to the guidance provided by the Suitable to drops that do not follow a global model. B-Spline Snake The B-snake approach provides a novel methodology.Images, a drop detection method based on image gradient energy and cubic spline interpolation has been used.īased on this framework, two complementary drop models have been designed. Interpolated gradient-based energy: In order to provide high precision contact angle on a wide range of.The drop reflection has been integrated into the drop model, so that to detect the interface position. Interface detection: Considering that the interface position is a crucial parameter when measuring contact angle,.Hoffmann, " A Snake-Based Approach to Accurate Determination of Both Contact Points and Contact Angles," Colloids And Surfaces A: Physicochemical And Engineering Aspects, 2006. Unser, " Low-Bond Axisymmetric Drop Shape Analysis for Surface Tension and Contact Angle Measurements of Sessile Drops," Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2010. See the "free software" section to download. These methods have been implemented as a Java plug-in for the ImageJ software and we make it freely available. LBADSA is based on the fitting of the Young-Laplace equation to the image data.DropSnake is based on B-spline snakes (active contours) to shape the drop.We propose, here, two new methods to high-accuracy measure contact angles: ![]() They are often dependant of one measurement setup, and may fail under non-standard conditions. The commercial softwares available today are still very limited. The technique of the sessile drop is today the most widely used method to measure this parameter. Written by Aurélien Stadler and Daniel SageĬontact angle is a simple and yet powerful tool for characterizing three-phase junctions.
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