Imagery REALLY feeds our monkey brains. Today: tools for 3D reef mapping. Bonus: some 360-degree images and video to use with virtual reality headsets.
Several exciting talks at the International Coral Reef Symposium featured 3D mapping of coral reefs using SfM, Structure from Motion techniques, to stitch together large numbers of overlapping images. The resulting 3D mapped images were used to help address a surprising range of research questions. The primary tools used to create these were Agisoft’s PhotoScan or the free and open source Bundler (github) by Noah Snavely. Part of the challenge of this difficult work is organizing the workflows and data processing pipelines: it’s an example of a type of cyberinfrastructure need that eventually EarthCube architecture should be able to help stage. Look for a guest blog soon by John Burns to learn more!
BONUS: The process of creating spherical or 360-degree images or video is at root a similar challenge of stitching together images, though more of the work is done inside a camera or on someone else’s platform. There are some recent beautifully-made examples of spherical coral reef images and 360 videos, viewable through virtual reality (VR) headsets; these have great potential for education and outreach. Consider the XL Catlin Seaview Survey gallery of coral reef photo spheres and videos from around the world, (including bleaching and before-and-after images) and Conservation International’s 8-minute video, Valen’s Reef, both exhibited at the current IUCN World Conservation Congress in Honolulu.
A new project, Google Expeditions, was launched this past week to facilitate synchronized use by multiple people of 360 videos and photo spheres as a design for class use. Google Streetview is being made more accessible as a venue for education and outreach, including creating and publishing one’s own photo spheres. Also find 360-videos of coral reefs on YouTube.
UPDATE: Visually powerful 360 bleaching images that Catlin Seaview debuted at ICRS, viewed by tablet or smartphone, are now accessible in this article on coral bleaching.