| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Here are a couple leads! https://publiclab.org/notes/cristoforetti/06-22-2016/webvalley-2016-improved-compact-spectrometer https://publiclab.org/..." | Read more » | over 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 | |||
| warren | "Hi, Ben - I hear via @stevie that you've switched to a higher power supply (2.5 amps) but again it only worked for ~24 hours. (https://data.sparkfu..." | Read more » | over 7 years ago | |||
| warren | "Ah I see the last transmission was March 31st, was that when you moved it? " | Read more » | over 7 years ago | |||
| warren | "Hi Ben! Catching up on this now, I guess it's running #open-pipe-kit, right? How long ago was the last data upload and what's changed since, if an..." | Read more » | over 7 years ago | |||
| chrowe | "That said, reading https://www.raspberrypi.org/documentation/hardware/raspberrypi/usb/README.md makes it sound like maybe all Pis support OTG " | Read more » | over 7 years ago | |||
| chrowe | "I think this should be relatively easy if you are using the Pi Zero. See http://blog.gbaman.info/?p=791 But for all other Pi devices I think it is..." | Read more » | over 7 years ago | |||
| warren | "Hi folks! I'm starting with the general case here, that a pi could act as a keyboard (an HID interface), for any of the above cases. I think we cou..." | Read more » | over 7 years ago | |||
| cfastie | "Are you storing data in RAM on the Pi? In a RAM drive? Do these data persist after the Pi is powered down? Is this Pi always connected to a compute..." | Read more » | over 7 years ago | |||
| pdhixenbaugh | "To clarify, this problem is concerned just with sending data over the USB? Collecting data in the first place is separate? Would you want the pi t..." | Read more » | over 7 years ago | |||
| mathew | "@bkeist do you want to try troubleshooting it live? could you join next Tuesday's open call? its from 2-3 Central time. " | Read more » | over 7 years ago | |||
| BenR | "@khufkens did you set a white balance on the Raspberry Pi for the Infrared image? I use a NoIR V2 camera with the Thorlabs RG9 longpass filter. " | Read more » | over 7 years ago | |||
| aldrin | "Sir, did you use any technique or calibration of pinoircamera's white balance? " | Read more » | about 8 years ago | |||
| thechapu | "@carolccarvalho mi nombre es Cristofer, soy de Chile. Llevo 2 años usando raspberry y mas de 1 año aprendiendo sobre NDVI, en la Universidad tuve u..." | Read more » | about 8 years ago | |||
| warren | "Just wanted also to link to @stoft's input on this question in this comment: As to the RPi camera, it seems to have two "difficulties" which need ..." | Read more » | about 8 years ago |