Short blog on returning to the water and using UWIS navigator to locate and mark sonar targets
Using UWIS to record locations of objects and features of interest using GPS navigation tablet.
Regular visitors will know we use the UWIS system to track our movements and camera positions as we work on the Vobster Photogrammetry Project. But what if we turned the idea on its head? Instead of tracking the camera or diver as it moves around could we use the UWIS tracker units as a static Read more about Control Points Defined[…]
It should come as no surprise to find we like efficiency. Anything that makes life easier will always be welcomed with open arms and the UWIS navigation system does just that. Maintaining efficiency carries on above the waves. Every single image is traceable back to the project or subject and retrieval takes seconds. Its part Read more about You need an App for that[…]
UWIS underwater GPS navigation continues apace with real-time viewing of 3D wreck models during a dive.
Regular followers of the Vobster Photogrammetry Project will know we have been working on this for some time. The project is all done in our spare time, for free and for the sheer joy of pushing the boundaries of photogrammetry. The game changer has been the introduction of UWIS and underwater GPS. To keep the Read more about A Snapshot in Time[…]
Underwater GPS being used to reconstruct 3D photogrammetry models.
Underwater GPS meets Photogrammetry For a while we have been using GPS located cameras to construct highly accurate models of defensive structures known as pillboxes. Fixing a camera position above the waves is straightforward enough and you can build representative models without additional scale bars or measurements if the GPS signal is accurate. The problems Read more about Accuracy Defined?[…]
Discussion around the use and benefits of accurate GPS values with image alignment in photogrammetry
Slope Analysis As we have discussed before Digital Elevation Models help us understand subtle changes in depth (or height) of the subject. We also think they are art in their own right. Tucked away in the 1.4 release of Agisoft Photoscan Pro is a preference that adds slope analysis. The colours applied to the model Read more about DEMS – Another View[…]