5 ms·
What you want is a few lasers of known wavelengths (RGB?) pointing at known angles such that, from the camera's perspective, they appear as lines (ie they aren'
by iicc 7y ago
What you want is a few lasers of known wavelengths (RGB?) pointing at known angles such that, from the camera's perspective, they appear as lines (ie they aren't perpendicular to the plane of the photo sensor).
A calibration image(s) can be made before each shot. Possibly the resulting image correction can be integrated in to the camera too.
The laser wavelengths are a substitute for the color chart. The laser angle means you get a reading at each distance (ie in the image, each point on the laser "line", corresponds to a distance.)
- simonh 7y agolaser beams are only visible if they reflect off something, so in a lot of situations the camera just won't see them except as points where they hit an object.
- deleted 7y ago[deleted]
- ynniv 7y agoHer algorithm doesn't require calibration. The color chart in many of the photos is to demonstrate the effect, or was just habit when she took them.
- londons_explore 7y agoTrue, but the method would totally benefit from calibration, because not all water is made the same - some has different densities of particulates in.
- nicwest 7y agoAlso I imagine that depth would be a significant factor
- rocqua 7y agoThat seems like a bad idea, because lasers are monochromatic. Sure, a red laser looks red. But just because you only see 50% of the brightness of the light of a red laser doesn't mean the absorption of all red colors will be 50%. Seems a lot better to use some very mixed source of light.