Advancements in IVM SLAM: Revolutionizing subsea mapping and inspection
First things first, let’s define this technology in a few words. SLAM is an acronym that stands for Simultaneous Localization and Mapping. It is a well-known method used with mobile vehicles to map the environment while simultaneously localizing the vehicle within that environment. At IVM Technologies, we use Visual SLAM, meaning the data required to function relies on images. In our case, these images are provided by the Hydro Series system, enabling the creation of a real-time 3D model.
Why is SLAM essential for subsea inspections?
This technology is essential for subsea inspections because it provides accurate positioning and spatial consistency in an environment where GPS is unavailable. Underwater vehicles must rely on onboard sensors, and without SLAM, localization errors accumulate quickly, making inspection data unreliable and difficult to interpret. By continuously building a map of the structure, SLAM ensures that images and sensor data are correctly aligned in space.
Seeing the bigger picture underwater
Think of it like drawing a map of a dark room while walking through it. Without SLAM, you are lost: you do not have the bigger picture of what you are inspecting, and you have no clear idea of your inspection coverage. With SLAM, every step you take helps complete the picture and tells you exactly where you are within it. This directly translates into time and cost savings.
Since its first release in 2023, IVM SLAM has clearly proven its value in subsea inspections, and we decided to take it one step further. The latest version of IVM SLAM introduces significant advancements that address the unique challenges of underwater applications, such as poor visibility and dynamic currents.
Global bundle adjustment
The latest version of IVM SLAM delivers improved model consistency through global adjustment, ensuring higher accuracy across the entire dataset. In subsea inspections, large datasets are processed in real-time, and this update has been developed to answer this specific aspect.
Real-time 3D measurements
Real-time 3D measurements are now integrated into IVM SLAM, enabling precise spatial data capture on the fly. This capability is vital for underwater inspections, where accurate measurements are essential for assessing the integrity of structures like pipelines, cables, and offshore platforms.
More about IVM SLAM
IVM SLAM integrates seamlessly with all Hydro Series units to generate real-time 3D models during subsea inspections. As the subsea photogrammetry unit captures high-definition images, low resolution frames are transmitted to the IVM SLAM topside computer, where advanced algorithms and AI trained on subsea environments continuously identify key features and align images. This processing generates a live 3D model displayed directly in the IVM Supervisor interface, giving operators immediate spatial awareness of the asset and inspection coverage as they navigate. Even in challenging conditions such as turbidity or low visibility, the system maintains robust performance, allowing operators to track progress, avoid missed areas, and optimize survey duration. In parallel, IVM SLAM automatically selects the most relevant images to significantly accelerate post-processing, reducing final 3D reconstruction time by up to 80% while preserving inspection-grade accuracy.
Reducing costs of subsea asset inspections
Contact us today to discuss your requirements, explore our solutions, and embark on a transformative journey in underwater inspection.