| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| LaPa | "Thank you Nedhorning, nice to see your answers in the my research note! I'm reading your notes about calibration trying to understand more about ND..." | Read more » | about 8 years ago | |||
| nedhorning | "I have the reflectance spectral for these materials and can provide a PDF, Excel, or CSV file of the spectra if someone lets me know a good way to ..." | Read more » | about 8 years ago | |||
| LaPa | "If anyone in PublicLab has a spectrometer and can get the proper calibration targets I could buy it. " | Read more » | about 8 years ago | |||
| richardbowman | "Hmm, yeah - getting things to reliably push-fit without crazy excessive force is quite tricky between printers, it could just be that your printer ..." | Read more » | about 8 years ago | |||
| mathew | "I was able to get one of the nuts to sit firmly at the bottom, but the other two wouldn't. My print might be a little messy there, I'm not sure. O..." | Read more » | about 8 years ago | |||
| mathew | "The paints are for making consistent whites and greys that will be the same perceptual color across a wide variety of lighting conditions. They are..." | Read more » | about 8 years ago | |||
| richardbowman | "Super. Oh, and I meant to say - the hexagonal holes are deliberately oversized, they taper down at the end to grip the nut firmly. The idea is yo..." | Read more » | about 8 years ago | |||
| mathew | "Awesome Richard, thanks! The basic mechanism of the rubber bands works flawlessly, the smooth motion is really impressive. I have to post a video..." | Read more » | about 8 years ago | |||
| richardbowman | "Hi Matt, good to hear you got it working :) I have switched to single elastic bands now, and you're right, it does make it much easier. The ins..." | Read more » | about 8 years ago | |||
| cfastie | "Mathew, I haven't seen any spectral data for Rosco paints. Is there any reason to think that they would be better than other paints for NDVI calibr..." | Read more » | about 8 years ago | |||
| mathew | "well, B&H will sell it to you by the gallon. pricey to try out. $42-95 a gallon, but it sure will make a lot of targets. I tried to get chip..." | Read more » | about 8 years ago | |||
| LaPa | "ok, THANKS all of you for the answers. I like that my research note elicits answers that can also affect other. I am interested to make experiences..." | Read more » | about 8 years ago | |||
| cfastie | "It would be great to have a few paints that: had reflectance spectra for 400 nm to 1000 nm, were exterior paint, were matte finish paint, were av..." | Read more » | about 8 years ago | |||
| mathew | "I haven't played around with it, but I'd assume a neutral gray "TV White" and "TV black" paint like these for TV camera calibration would be the be..." | Read more » | about 8 years ago | |||
| cfastie | "I don't know of any commercially available inexpensive calibration targets. A good calibration target will have the same reflectance for all wavele..." | Read more » | about 8 years ago | |||
| LaPa | "Hi, 1) unluckily I don't have access to a spectrometer 2) wich are the companies where I can buy a cheap Calibration targets? 3) may it be fine to ..." | Read more » | about 8 years ago | |||
| LaPa | "Thank you Chris, I'm going to read with the attention the Ned Horning's note that you link! Have a good day! LaPa " | Read more » | about 8 years ago | |||
| kevinvivergy | "Ahhh I see. And it looks like both ways showed that there is a big plume of particulates coming out of the rock quarry that dissipated over the rig..." | Read more » | about 8 years ago | |||
| mathew | "the authors did two levels of survey-- first the 6 minute 'snapshots' and then they used that to determine where to place passive monitors for long..." | Read more » | about 8 years ago | |||
| kevinvivergy | "Wow that is super interesting. That would definitely cover the variation over space... but what about if the levels vary over time in each particul..." | Read more » | about 8 years ago | |||
| cfastie | "Sorry I missed some questions. Calibration targets work outside or in a greenhouse. Calibration targets are hard to find and very expensive. But ..." | Read more » | about 8 years ago | |||
| mathew | "hah! school networks are always a problem. I posted a note recently on hotspot identification, the first stage of which involved a systematic surv..." | Read more » | about 8 years ago | |||
| kevinvivergy | "Thanks @mathew! Has certainly been an adventure. Only consistent issue has been school internet security protocols- they treat the Raspberry Pi as ..." | Read more » | about 8 years ago | |||
| mathew | "I'm revisiting your note, just want to say again how cool this is! great to see you're still up and posting data. " | Read more » | about 8 years ago |