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General / Re: Seeking solution for UAV data alignment challenge over water with Agisoft Metash
« on: October 21, 2023, 07:03:48 PM »
Hello Eden
Considering the principle behind photogrammetric matching, it's impossible to obtain any good result with water surfaces (which moves and have reflections) or any other moving or reflective surface. Unless there the water is very very shallow (20 cm or less), perfectly transparent, and you have distinctive features bellow the water, you won't be able to get any matching. The only way to obtain good altimetric results bellow water is to use sonar scanning (the needed equipment depends on your needs and environmental characteristics) or by using LIDAR that supports bathymetric features (usually until 2 Secchi depth).
If you are low on budget it will be a problem because a LIDAR with these features usually costs 75000 US D or a lot more.
Cheers
Considering the principle behind photogrammetric matching, it's impossible to obtain any good result with water surfaces (which moves and have reflections) or any other moving or reflective surface. Unless there the water is very very shallow (20 cm or less), perfectly transparent, and you have distinctive features bellow the water, you won't be able to get any matching. The only way to obtain good altimetric results bellow water is to use sonar scanning (the needed equipment depends on your needs and environmental characteristics) or by using LIDAR that supports bathymetric features (usually until 2 Secchi depth).
If you are low on budget it will be a problem because a LIDAR with these features usually costs 75000 US D or a lot more.
Cheers