News
Getting into Photogrammetry – debut blog from Alex Tasker
Every cloud has a silver lining. In early March our skipper called off the weekend’s diving in Loch Fyne. A shame – but I made a couple of phone calls and seized the opportunity to attend IANTD’s first, two-day Photogrammetry course instead. I’ve been experimenting with this over the last year and increasingly feeling that I needed some help!
Tim Clements, who prepared the course, was there to lead it at Vobster Quay. Although there was quite a mix of students with a variety of camera gear, everyone was able to create 3D models from their own image data that they had captured during the underwater exercises which were part of the course. There was an emphasis on teamwork, safety and dive management, as well as on the photographic tasks, and all the students got useful feedback on their in-water abilities over the weekend.
I was paired with David, an experienced technical instructor. While this was my first visit to Vobster he must have dived there hundreds of times – he’s enthusiastic about the place and I must say I found it well set up and hassle-free. We gelled easily and I really enjoyed developing the use of “angel lighting” over the three dives we did together. On dive #2 I had an issue with my primary camera and was relieved to have the Paralenz on top of my rig – I was able to extract frames from the video to produce this model: https://skfb.ly/6HYJJ (that’s the same concrete block we were playing with topside the previous day!)
Back in the classroom, Simon Brown of Deep3D provided expert knowledge on photography and image processing. I was delighted to renew my acquaintance with Simon, who’s a particularly accomplished photogrammeter (if that’s the word) and has modelled numerous interesting underwater sites. I came away with pages of notes to digest on the photography itself and subsequent workflow.
We were also treated to some great 3D VR demos from Marcus Blatchford, illustrating some of the potential for our 3D models. He lent some much-needed computing power too, putting together this model from the image data I captured on dive #3: https://skfb.ly/6HTHX
We all deemed the course a real success; I’m certainly hoping to share some far more interesting models in the near future…
Gear News
Go anywhere with Stahlsac
Stahlsac dive bags and travel luggage are built for our community of divers, surfers, kayakers and outdoor explorers who need bags that are constructed with durability, toughness, and the highest quality the industry has ever seen. We were founded by one man determined to build better watersports and dive bags, and today, that mission is carried on by many. Adventure doesn’t just present itself; it requires discovery. When we design dive bags, we make sure they are tough enough for you to explore in all conditions—warm and cold, wet and dry—to the nearest and farthest reaches of the earth. And for those times you want to push the boundaries of adventure, Stahlsac dive bags make sure you can truly GO ANYWHERE.
Abyss Duffels
Made to be your partner-in-crime on every adventure, Stahlsac’s Abyss Duffels protects your gear from Mother Nature’s worst. Tough and 100% waterproof with double-TPU nylon material that shrugs off daily wear-and-tear, and RF-welded seams further boost the bag’s potential for lifelong exploring. Get Wet. Get Lost. Go Anywhere with Abyss.
- A weatherproof duffel for trips, travel, and adventure
- Ultra-durable double-TPU nylon protects your gear
- Material repels water and keeps your equipment dry
- RF-welded seams are flush, tough, and waterproof
- Removable straps transform duffel into backpack
- Zippered internal stow compartments carry essentials
- External zippered flap is easy to open and close
- Welded external handles make transporting a breeze
Panama Mesh Backpack
The most copied design in scuba diving, the Stahlsac Panama Mesh Backpack is the “original” design and features two high-density foam padded shoulder straps, extra durable polyester mesh, duffel bag handles and our unique zippered dry pocket inside that combines with a wet pocket outside. The bottom’s built from reinforced 18-gauge PVC nylon to combat the wear and tear of your active coastal lifestyle, and, as a bonus in every bag, we supply a 12″ x 12″ mesh drawstring satchel for extra stowing utility. Pack up your beach kit and go.
- Density foam padded shoulder straps
- Outside wet/dry pockets
- 2 Carry handles
- Tough, snag-resistant polyester mesh
- Reinforced PVC bottom
For more information about Stahlsac bags, visit www.stahlsac.com/dive-bags.
Sea & Sea is the home of Stahlsac and other leading diving brands in the UK.
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