What can be seen using an IR camera on the ocean
ubcsailbot.org
What can be seen using an IR camera on the ocean
1–10 of 10 posts
Re: What can be seen using an IR camera on the ocean
#2There are racing teams with multi-million dollar budgets who would be interested in this sort of detection technology. For example, just a couple days ago one of the top competitors in the Sydney-Hobart abandoned the yacht race due to hull damage from hitting...something [1].
However, testing in waves is very important, and this article shows none of that (barely mentions it, in fact). But at least the big boats have the advantage of being able to put a sensor 50 meters up in the air, if that helps.
[1] http://www.smh.com.au/sport/sailing/sydney-to-hobart-comanch...
Re: What can be seen using an IR camera on the ocean
#3It seems like you could take advantage of some background subtraction.
Detecting the horizon seems trivial enough (hough transform? or a robust edge detector). If you know where that line is then you can take series of gradients normal to it and form an average temperature model as a function of distance from the horizon. If you take enough of these gradients across the image, you should be able to get a robust average.
You then use this model to predict the temperature at each pixel and take a difference with the observed data. What should happen is you get a ton of ~zeros, a bit of noise due to waves and any non-sea object will stick out like a sore thumb.
The rule here is that absolute measurements will kill you when it comes to dynamic range. You're much better off taking relative measurements.
Re: What can be seen using an IR camera on the ocean
#4There are racing teams with multi-million dollar budgets who would be interested in this sort of detection technology. For example, just a couple days ago one of the top competitors in the Sydney-Hobart abandoned the yacht race due to hull damage from hitting...something [1]. However, testing in waves is very important, and this article shows none of that (barely mentions it, in fact). But at least the big boats have…
I'd think underwater hazard detection would be more relevant.
Another modern shipwreck: http://www.newyorker.com/news/sporting-scene/twenty-first-ce...
Re: What can be seen using an IR camera on the ocean
#5Well that's kind of boring. I was hoping I could use this to look for sharks before going for a swim.
Re: What can be seen using an IR camera on the ocean
#6Interestingly, the last picture there - the one looking at the sun - was taken at a nude beach (wreck beach)
Re: What can be seen using an IR camera on the ocean
#7There are racing teams with multi-million dollar budgets who would be interested in this sort of detection technology. For example, just a couple days ago one of the top competitors in the Sydney-Hobart abandoned the yacht race due to hull damage from hitting...something [1]. However, testing in waves is very important, and this article shows none of that (barely mentions it, in fact). But at least the big boats have…
I'd think underwater hazard detection would be more relevant. Another modern shipwreck: http://www.newyorker.com/news/sporting-scene/twenty-first-ce...
Underwater hazard detection would be very interesting to explore, but for UBC SailBot's purpose (crossing Atlantic Ocean with surface vessel) overwater hazard detection seems more feasible with the technologies currently out there (radar, IR, AIS, etc). Do you have any suggestions for good technologies to explore for (horizontal) underwater obstacle detection? We have played with the idea of horizontal sonar, but not sure how feasible this is...
Re: What can be seen using an IR camera on the ocean
#8Interestingly, the last picture there - the one looking at the sun - was taken at a nude beach (wreck beach)
"clothing optional" you mean... ;-)
Re: What can be seen using an IR camera on the ocean
#9Well that's kind of boring. I was hoping I could use this to look for sharks before going for a swim.
now that would be awesome! :-D
Re: What can be seen using an IR camera on the ocean
#10[deleted]