| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| zengirl2 | "This tutorial will help you--skip to software section after you check parts https://learn.adafruit.com/raspberry-pi-wearable-time-lapse-camera/over..." | Read more » | about 7 years ago | |||
| Sidney_AstroPlant | "Using NIR LEDs seems like a good option to look into and I'm happy to hear that I might not have to deal with extensive filtering! I just got a res..." | Read more » | over 7 years ago | |||
| cfastie | "A simple option might be to turn on some NIR LEDs when the photography happens. The NIR:VIS ratio might not match sunlight, but if you know what it..." | Read more » | over 7 years ago | |||
| Sidney_AstroPlant | "The kit is fully enclosed with LED with a certain blue and red ratio (I have to verify what the exact ratio is). This brings me to the conclusion t..." | Read more » | over 7 years ago | |||
| cfastie | "Thanks for adding a photo. NDVI is based on the assumption that the light illuminating the foliage has a certain proportion of NIR and VIS -- the p..." | Read more » | over 7 years ago | |||
| cfastie | "Using two cameras solves one of the two problems I described (mixed NIR and VIS). That problem can also be solved by measuring or making assumption..." | Read more » | over 7 years ago | |||
| Sidney_AstroPlant | "Thanks Chris for your response. My assumption was that the blue filter supplied with the RPI Noir camera blocks the red channel fully. So you get a..." | Read more » | over 7 years ago | |||
| Sidney_AstroPlant | "Thanks for the positive messages! I see that both of you are active in open source hardware and software initiatives. We are thinking to share our ..." | Read more » | over 7 years ago | |||
| zengirl2 | "Glad you posted here as you know I'm a fan of the project. :) " | Read more » | over 7 years ago | |||
| cfastie | "I haven't used the Pi NoIR cam and have not seen your photos, so I can only respond from general principles. Camera sensors are not as sensitive ..." | Read more » | over 7 years ago | |||
| warren | "Just wanted to say this looks really cool! " | Read more » | over 7 years ago | |||
| aldrin | "sir, do you now the right values of white balance in pi noir in capturing ndvi? " | Read more » | over 7 years ago | |||
| jfd | "nice work! " | Read more » | almost 8 years ago | |||
| ajawitz | "RE:Any Radio? Wow! I had no idea! That could definitely be really useful if you already have compatible equipment for another purpose RE:OpenCPN..." | Read more » | over 9 years ago | |||
| danbeavers | "An additional site http://www.discriminator.nl/ais/index-en.html and http://www.discriminator.nl/index-en.html show how to do it with any radio tha..." | Read more » | over 9 years ago | |||
| khufkens | "Thanks Mathew for the link back! The whole package should work perfectly now, I'm still working on implementing the input output part, where I can..." | Read more » | over 9 years ago | |||
| mathew | "sounds cool. here's the link back to the context and description of PhenoPi http://publiclaboratory.org/notes/khufkens/04-24-2015/phenopi-a-citiz..." | Read more » | over 9 years ago | |||
| khufkens | "There are three variables in this setup: 1) the light source's output, which needs to be characterized or idealized (you could use the sun as a re..." | Read more » | over 9 years ago | |||
| warren | "Uh, perhaps I am not fully understanding on my initial readthrough, but since we have a big need to characterize sensitivity in the webcams we use ..." | Read more » | over 9 years ago | |||
| khufkens | "If I can back out the spectral response I'll post it online for sure. So give it some time. " | Read more » | over 9 years ago | |||
| DarylWM | "Thanks for sharing your work. I've had the same trouble trying to find the spectral response curve for the OV5647 sensor, so this technique was ver..." | Read more » | over 9 years ago | |||
| stevie | "Woah! Awesome thread... " | Read more » | over 10 years ago | |||
| amysoyka | "There is this really cool trick for peeling CD's. This video shows how it works: CD spectroscope: http://youtu.be/-cH_2mbsvBo " | Read more » | over 10 years ago | |||
| btbonval | "Thanks for the screenshot. I think it will help give people an idea of what they're getting if they should choose to use this meteorological statio..." | Read more » | over 10 years ago |