| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, just curious which lens you're referring to? Thanks! " | Read more » | about 6 years ago | |||
| cfastie | "Computing NDVI requires a value for the "brightness" of both red light and near infrared light for the same part of a scene (or for each pixel). Un..." | Read more » | over 6 years ago | |||
| warren | "Hi, possibly also see this related question: https://publiclab.org/questions/jjoll/06-03-2017/can-a-spectrometer-be-used-to-detect-material-type " | Read more » | over 6 years ago | |||
| warren | "Hi, very late reply but I'm starting to tie everything in this topic area together -- there's now documentation up at both https://publiclab.org/wi..." | Read more » | over 6 years ago | |||
| nedhorning | "How about testing it on subsets of satellite imagery? You can pick the 3 bands and the band order you want for the testing and can compare that to ..." | Read more » | almost 7 years ago | |||
| ccpandhare | "Thanks for the amazing explanation and reference, @warren! I'll be grateful for your help @nedhorning and @warren :) " | Read more » | almost 7 years ago | |||
| warren | "Hi, Ned - i'm not asking about calibration at this point, just for a way to empirically test (in the sense of automated testing -- https://en.wikip..." | Read more » | almost 7 years ago | |||
| ccpandhare | "Thanks for that @warren! " | Read more » | almost 7 years ago | |||
| nedhorning | "Hi Jeff - I think I might be able to help with this but I'm not sure what you are looking for. NDVI is simply an algorithm applied to two bands so ..." | Read more » | almost 7 years ago | |||
| warren | "Hey @ccpandhare - just a heads up on this! " | Read more » | almost 7 years ago | |||
| cfastie | "The basics are described here: https://publiclab.org/wiki/ndvi-plots-ir-kit, and there is more detail in many research notes and comments at this s..." | Read more » | about 7 years ago | |||
| warren | "Hi, just wondering about my question on the screw in the photo below -- is that to unscrew the lens assembly itself? " | Read more » | about 7 years ago | |||
| suman | "There's no information about making GoPro first version to full spectrum in the internet...i have done a lot of research in the web and found nothi..." | Read more » | over 7 years ago | |||
| warren | "Can you show a picture of the front and back as well? I think i see a screw, but not sure... " | Read more » | over 7 years ago | |||
| warren | "Hmm, very hard to follow without images, huh? I wonder if there are any YouTube tutorials? " | Read more » | over 7 years ago | |||
| suman | "Found this on the DIYdrones forum :http://diydrones.com/forum/topics/go-pro-camera-near-ir?id=705844%3ATopic%3A767644&page=2#comments But stil..." | Read more » | over 7 years ago | |||
| suman | "Dear Warren, This is the first version of GoPro Hero HD without screen not Hero 2 (although it looks quite similar). Yeah the lens is fixed (no ..." | Read more » | over 7 years ago | |||
| warren | "Via @wildintellect on the plots-infrared discussion list: Replace the lens, there are several aftermarket GoPro lens made for IR. http://stuntcams..." | Read more » | over 7 years ago | |||
| jfd | "Nice! Thank you Warren, ok I will check it out. Yes, I will develop on Github... I will have some time in next 2 weeks, once I get a prototype goin..." | Read more » | over 7 years ago | |||
| warren | "Are you developing on GitHub, and might I follow your progress there? " | Read more » | over 7 years ago | |||
| warren | "Well, basically we just take the incoming image pixel by pixel, and for each of the input pixels, we plug their color values into the "infragrammar..." | Read more » | over 7 years ago | |||
| jfd | "Hi Warren, Thank you for your email; I see this is a greenfield area. I'd like to get this implementation to run as fast as possible. If you could..." | Read more » | over 7 years ago | |||
| warren | "Hi, this is a good question, but I wanted to suggest possibly adapting the WebGL implementation which is awfully fast: https://github.com/p-v-o-s/..." | Read more » | over 7 years ago | |||
| ashwinvasudevan | "@abdul You can take a look at the project here https://github.com/mirkix/BBBMINI Basically, Mirkix modified the linux port of the Ardupilot proje..." | Read more » | over 7 years ago |