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How do I detect large bubbles on the surface of a boiling liquid?

Asked by Aaron Aquino on 17 Feb 2016
Latest activity Answered by Rahul punk on 15 Feb 2019
I've been studying machine vision system for automation of production of sugar from sap. As a background, the process simply involves heating the liquid sap to boiling, then turning off the heat and mixing the liquid up to crystallization once large-sized bubbles form on the surface of the boiling liquid. Now, I need to develop a MATLAB program for two things:
1. One that will detect the large-sized bubbles of a certain radius or higher, from captured image of the boiling process. A sample image may be viewed from this link: https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/55438/versions/1/screenshot.jpg
2. One that uses the algorithm in (1) in real time, where the images are acquired from a video of the boiling process, also taken in real time.
Please help with this. Thanks in advance. :)

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Is there any prospect that the light source and/or camera could be moved, or that a different frequency could be used, or perhaps a pattern could be projected? For example it might be easier if a grid (red for example) were projected over it.
I wonder what it would look like in infrared ? I speculate that the bubbles would be slightly cooler.

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1 Answer

Answer by Rahul punk on 15 Feb 2019

https://www.mathworks.com/matlabcentral/fileexchange/70220-rahulpunk?s_tid=prof_contriblnk

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