It’s great to see some cats using the Yale Open hand, hydrophones, and R-Pi’s in interesting ways with the ROVs. I’ve written posts about wanting to do just these things some time ago. Now, I’d like to turn your attention towards PTMs and how, in my opinion, they can assist the marine archaeological and possible search/rescue groups in identification of submerged objects via polynomial texture maps (PTM).
Quoted from the link:
"Polynomial Texture Maps (PTMs) are a simple representation for images of functions instead of just images of color values. In an conventional image, each pixel contains static red, green, blue values. In a PTM, each pixel contains a simple function that specifies the red, green, blue, values of that pixel as a function of two independent parameters, lu and lv.
Typically, PTMs are used for displaying the appearance of an object under varying lighting direction, and lu,lv specify the direction of a point light source. However, other applications are possible, such as controlling focus of a scene. PTMs can be used as light-dependent texture maps for 3D rendering, but typically are just viewed as ‘adjustable images’."
It may not be obvious at this moment what being able to modify light source and refocusing objects in a given image might illuminate for you. However, given the examples from HPs website and the papers written by Tom Malzbender, highlighting Sumerian, Egyptian, and ancient Greek discoveries made by using a PTM rig as an analysis tool, one may begin to consider what such techniques could do for underwater explorers like ourselves.
Well, as I sit here, 12am on a Friday morning, wrapping up the CTD work and getting ready for some wet testing of the near finished kit, I find myself planning the next payload project. The ARC-CAM.
This on a ROV
Doing this for science:
You get the idea. Or you will, in the coming months. Being able to do this real-time and share the data in said real time to a community of explorers would be pretty exciting.
I’ll post CAD and specifications for the camera rig this weekend.