Application for bubble depth tracking
Hi all,
I am currently looking at potential methods of imaging bubble particle interactions as they pass upwards through a clear column. I think the intel depth camera could be of use but a little concerned about; one imaging bubbles as they are not solid objects and two the imagining distance. The column itself is only 70mm in diameter, would any of these products be able to effectively distinguish the depth of the bubbles when the difference may only be a few millimeters. Any advice would be greatly appreciated.
Kind regards.
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Hi Saczekjoshua Such a scene can indeed be difficult to depth sense, due to the problems of reflectivity of the container or its contents, or difficulty in reading depth detail from a clear container as it will tend to pick up what is on the other side of the clear container.
The RealSense D415 is likely the most suitable model for this particular application. It has an optimal depth accuracy resolution of 1280x720 and excels at capturing small objects that are static or only have a small amount of motion.
I ran extensive tests with a D415 on a clear plastic drinks bottle containing clear water and shook up the bottle to simulate bubbles whilst observing depth readings with the camera. The camera had difficulty reading depth from the empty sections of the bottle but did better with the liquid sections that provided resistance to the light passing through.
When the bottle was shook up to disturb the contents, the empty areas became more readable by the camera as the liquid flowed into them and then returned to being difficult to read when the liquid settled and that area of the container was empty again.
The image below shows the filled bottle with an empty area near the top. The empty area above the top level of the liquid does not render well on the depth image. When the bottle was shaken to make the contents rise up, the empty area temporarily became depth-readable.
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