| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Abdul, You are correct that all of the things you list could be responsible for the failure to produce a meaningful NDVI image. It could also be du..." | Read more » | about 8 years ago | |||
| cfastie | "Sorry to hear about the short lifespan of your timelapse deployment. Tony did some trials with the Mobius last spring and learned that it has a bat..." | Read more » | about 8 years ago | |||
| cfastie | "Even with that nice filter it won't be possible to get a pure red channel. The red channel is sensitive to NIR light, and NIR is transmitted by the..." | Read more » | about 8 years ago | |||
| cfastie | "Scott, There is no problem. The Mobius can do interval shooting at any interval, and it can also do motion detection. The trail camera has NIR LED..." | Read more » | about 8 years ago | |||
| cfastie | "This is a good question, and not an easy one to answer. Preferred characteristics of cameras to be converted to pure NIR or full spectrum (NIR + R..." | Read more » | about 8 years ago | |||
| cfastie | "Depending on the blue filter used, photos from a Pi NoIR camera would capture (instead of R,G,B) NIR+R, NIR+G+B, B+NIR+G. If you use a good red fil..." | Read more » | about 8 years ago | |||
| cfastie | "Thanks for the details. After you use a CFL to calibrate the spectrometer, replace the CFL with another light source. If the spectrometer is not d..." | Read more » | about 8 years ago | |||
| cfastie | "The sensors in consumer cameras have very low sensitivity at wavelengths shorter that 400 nm. Some cameras are slightly sensitive down to about 380..." | Read more » | about 8 years ago | |||
| cfastie | "Kat, Do you have a standard lycopene extraction? How do know what the spectrum of lycopene should look like? Are you using a fluorescent lamp to ..." | Read more » | about 8 years ago | |||
| cfastie | "The spectral response figure came from an article linked in this thread: https://groups.google.com/forum/#!topic/plots-infrared/aJhM30D6bUM That's..." | Read more » | about 8 years ago | |||
| cfastie | "All three Bayer filters (R,G,B) transmit some near IR light. Above: Spectral response of a Canon PowerShot A2200 before (top) and after (bottom)..." | Read more » | about 8 years ago | |||
| cfastie | "Is replication the same as reproducing the result of an experiment? The answer to this question is messy because the term replication is used to r..." | Read more » | about 8 years ago | |||
| cfastie | "It might be good to agree on definitions of some basic terms. Here is one suggestion. 1. Reproducibility, Reproducing the results of an experiment..." | Read more » | about 8 years ago | |||
| cfastie | "Replication (reproducibility) in scientific studies has become a topic of conversation because: Recent investigations suggest that few researcher..." | Read more » | about 8 years ago | |||
| cfastie | "Gretchen has a good point that the term replication has very different meanings when applied to builds, modifications, field tests, observations, e..." | Read more » | about 8 years ago | |||
| cfastie | "Yes, the config file goes on the SD card. NDVI is based on the proportion of red to NIR light reflected from leaves. That proportion depends in pa..." | Read more » | about 8 years ago | |||
| cfastie | "You are correct that this is not really an extraction. It's just plant material chopped up finely in a blender with some liquid. I also did this wi..." | Read more » | about 8 years ago | |||
| cfastie | "Thanks Leslie. In five years I think this is the first real evaluation of LEAFFEST. It’s so nice to get some reassurance that at least someone didn..." | Read more » | about 8 years ago | |||
| cfastie | "Don't we have to have an activity before we have a follow up activity? There are lots of ways to make this an activity and many ways to follow up (..." | Read more » | about 8 years ago | |||
| cfastie | "It still seems a little expensive to fly a thermal imager, but the FLIR One is US$250 and needs more or less any old smartphone. So it's not too ba..." | Read more » | about 8 years ago | |||
| cfastie | "Oh no @Zengirl2, TY so much for posting the awesome hard-hitting journalistic expose of LEAFFEST at the Adafruit blog: https://blog.adafruit.com/20..." | Read more » | about 8 years ago | |||
| cfastie | "This looks like a really good result that answers a lot of your original questions. I guess most people don't tag their notes with a location, so t..." | Read more » | about 8 years ago | |||
| cfastie | "Like this: https://twitter.com/search?q=%23leaffest2016&src=typd " | Read more » | about 8 years ago | |||
| cfastie | "Great. We should use #leaffest2016, because tweeting #leaffest is confounded with many other things. " | Read more » | about 8 years ago |