It's amazing how technology advancements, especially in the subsea robotics domain, and innovation, a culture we constantly pursue in BM, meet for promoting cost-efficient solutions in projects that would normally require substantial budgets to be completed successfully a few years back.
This is a typical example that demonstrates the case.
We have been in the underwater photogrammetry business for some time now, typically relying on larger ROVs with advanced photogrammetric cameras and equipment payload for such projects, but we are now
investigating the potential of our smaller ROVs, which however incorporate the latest subsea technology at a smaller form factor and at a reduced budget, to deliver high-quality 3D modelling results for our clients.
This is a photogrammetric model of a Piper (type PA-28-181 Warrior II) aircraft found sunken off the Greek Island of Makronisos. We have utilized our Chasing M2 Pro Max ROV to acquire the raw photogrammetric material (UHD images) needed for the construction of the 3D model of this aircraft wreck. The utilization of the raw material acquired by the ROV camera for the construction of a detailed, properly scaled and aligned, 3D model, constituting the core of a successful underwater photogrammetry processing method, is a different very interesting and technically hot but also very debatable, especially in recent years, subject (which software tools to use, which processing methods, and so on). We have left this part out of this post discussion.
Some tech details about this project:
We have utilized the Chasing M2 Pro Max ROV for a 4K video inspection of the photogrammetry subject (aircraft wreck). The video inspection lasted 1hour and 4 minutes. A total number of approx. 11,000 UHD frames (8 MP analysis photographs) extracted from the video, at a rate of 3 frames per second, with the use of dedicated video processing software. Out of these frames, 5,000 were carefully selected based on clarity and image quality, ensuring a 60% overlap on average. Sufficient image overlapping is crucial in almost all photogrammetric projects.
Model specifics: sparse point cloud comprising of 1.6 mil tie points, dense point cloud 50 mil points, mesh with 16 mil faces. Scaling was performed with coded targets deployed around the wreck position and lens calibration at inspection depth was performed by utilization of a proprietary calibration plate. Model measured to have a cm accuracy.
Hope you will enjoy the result by watching this short video ……………………
ΒΜ Consulting Marine shared an exciting underwater photogrammetry case study on our forum.
https://lnkd.in/gFgn2Sj2
It's a fascinating journey of discovery and innovation beneath the waves, and we'd love for you to join the conversation. Check out the link, share your thoughts, and let's explore the hidden mysteries of the ocean together. Your insights could illuminate new paths!
https://lnkd.in/gNJ_Ke4f
We've just shared an exciting underwater photogrammetry case study on our forum.... | By Chasing Underwater DronesFacebook
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Congratulations team Blackmaps! Great testimony to your abilitites in safeguarding aerodromes