I've spoken with a few people over the past months about figuring out a way to monitor the color of a patch of water or air in a timelapse video -- to see if it changes on a cyclic basis, and if you can detect things like turbidity changes, emissions, and that sort of thing by looking at a graph of color change over a long period of time.
With help from a few people at a Tactical Tech event this week (more soon), I got a very rough prototype running; you can upload .mp4.mp4 videos (maybe others?) and click on the video where you want to "monitor" -- and as it plays, it'll graph the brightness of the pixel you've clicked. The data can be downloaded as well.
This has lots of possible pitfalls or problems - obviously the day/night cycle changes the lighting conditions, and so does the weather. The idea, though, is to see if, in a predictable enough situation, you could see some kind of recognizable and measurable change.
I used a timelapse video of mountaintop removal mining by @laurachipley (posted on this note) and it's working enough to try a few videos out. Please - if you have a timelapse, give it a try! Comments, ideas, refinements, all welcome.
Keep in mind, it's a very rough prototype! It is likely to break :-P
I got this data from the mine video, clicking on the exposed hillside -- but i wonder if my computer being really slow is making the video display poorly and therefore the data much rougher than it really is:
x,y 1,96 3,66 5,29 7,111 9,191 11,80 13,146 15,70 17,164 19,71 21,138 23,255 25,255 27,255 29,255 31,255 33,255 35,255 37,255 39,254 41,255 43,255 45,255 47,255 49,226 51,255 53,249 55,255 57,255 59,255 61,255 63,255 65,255 67,255 69,206 71,255 73,255 75,208