Wow, thanks for the link Marco.
excellent video, as is her one about white balance underwater.
so... if you really want to get good colour video underwater, you're going to have to get serious.
use a red or magenta filter on your camera lens below 3m depending on whether you have blue or green water, and increase camera sensitivity setting to compensate for the colour lost in the filter. this may turn out grainy in low light conditions.
use blue tint ROV lights or a blueish filter on your white ROV lights when operating with a mix of natural and artificial light and compensate for the blue colour by using manual white balance on the camera settings, and.... re-set it using a white or grey card close to the camera EVERY METER OR TWO!! of depth change.
Use white ROV lights when operating in the dark (at night or in deep water) and use manual white balance, no need to keep re-setting it every meter or two.
Accept that everything more than 1-2m away from the camera will be blueish, trying to compensate for it will screw up the colours close to the camera.
ye canny change the laws of physics capt'n.
I now have a "coaxitron" controller for the CCTV camera I use in my ROV so will be able to manually set white balance on the fly from my ROV console.
