Tracking Bubbles in High-speed Image Sequences
نویسندگان
چکیده
In this study, we develop a semi-automatic system for tracking bubbles in image sequences. The vapor bubbles are generated on the surface of a heated tube in a boiling liquid. The images are taken with a speed of one thousand images per second via a high speed digital video camera. Due to some physical properties such as the testing liquid, the surface structure of the heated tube, temperature, and pressure, there are many kinds of reflections on the bubble images. Our system is robust against these reflections and is able to track the vapor bubble boundaries in an image sequence based on a manual selection of the bubble as a primitive in the first image and under the assumption of a circular shape. After the tracking, the bubble volumes changing in the bubble formation, and the bubble speed after the departure from the nucleation site can be determined. These parameters are important in exploring a heat transfer relationship between a given liquid and a heated tube.
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