Use realsense d435i underwater
I am using realsensed435i to measure the distance of an object underwater. Since infrared light attenuates quickly underwater, the measured distance error is very large（The real distance is 90 cm, and the distance obtained by using the camera underwater is about 70+ cm）. I don’t know if anyone has related experience .I hope to get some pointers, thank you!
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Hi Carlsonito You could try aligning depth to color to improve results, like in Intel's Python tutorial depth_under_water. Aligning depth to color can help to distinguish background pixels from foreground pixels.
https://github.com/IntelRealSense/librealsense/blob/jupyter/notebooks/depth_under_water.ipynb
Also, applying a physical optical filter over the top of the camera lenses may help. For example, using a Linear Polarizer filter can greatly reduce the negative impact of glare from reflections.
https://dev.intelrealsense.com/docs/optical-filters-for-intel-realsense-depth-cameras-d400
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