| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Lens separation on cheaper GoPro clones seems very easy! https://publiclab.org/notes/azaelb/12-04-2016/conversion-of-4k-sport-camera-for-ndvi-anal..." | Read more » | almost 7 years ago | |||
| Claytonb | "@Gianni_Gadaleta - I never did get the chance to have the Komatex scanned so I haven't used it for target material. Becky Done with SABIC Polymersh..." | Read more » | over 8 years ago | |||
| Gianni_Gadaleta | "Good evening @AFairbairn , I read with great interest your post because even I and my group are having the same difficulties to develop good NDVI i..." | Read more » | over 8 years ago | |||
| Caca_nkg | "Hi guys... Any success with the Phantom??? " | Read more » | over 8 years ago | |||
| cfastie | "I like #4 too. I don't have a good answer for the type of glue. Something thick and quick drying. It does not have to be sticky, it just has to for..." | Read more » | over 8 years ago | |||
| talha | "Thank you very much for your quick and informative answer, Mr. Chris. Among those choices, which one do you suggest? To me, #4 looks ideal (light c..." | Read more » | over 8 years ago | |||
| cfastie | "The new filter can be put several different places: stick it on the front of the lens. Build a frame to hold it in front of the lens: https://pub..." | Read more » | over 8 years ago | |||
| talha | "I'm getting crazy, there is massive amount of talk about mobius conversions but there is no single guidance for converting the mobius for ndvi. I'v..." | Read more » | over 8 years ago | |||
| Matthew318 | "Using a heat gun allowed a clean removal of the filter, much easier than smashing. Would recommend just getting a $20 heat gun from home depot. " | Read more » | over 8 years ago | |||
| Claytonb | "@AFairbairn - I spent quite some time searching for reliable and cheap target material for calibrations. I spoke with someone who scanned Rustoleum..." | Read more » | almost 9 years ago | |||
| cfastie | "Yes I have seen Valspar in the US for many years, and Rustoleum is a big brand here. Maybe there is some international brand of art supplies that m..." | Read more » | almost 9 years ago | |||
| AFairbairn | "Good points. I am checking if my University has a spectrometer, I do not think my department does, however our geology people may have one. Waiting..." | Read more » | almost 9 years ago | |||
| cfastie | "Any place that sells paint has paint color chips, but these are too small to be useful as targets. But fancy paint stores have huge color samples. ..." | Read more » | almost 9 years ago | |||
| cfastie | "That's a really relevant article. They scale the graphs relative to a standard, so 100% is actually 20% reflectance. That means 25% reflectance of ..." | Read more » | almost 9 years ago | |||
| AFairbairn | "Chris, You are probably correct about the foil being a poor material because of how shiny it is, had not really considered that. I came across thi..." | Read more » | almost 9 years ago | |||
| cfastie | "ISO 100, 1/320 shutter speed That is much better than I thought would be possible. I don't know how those skinny little bands provide enough light..." | Read more » | almost 9 years ago | |||
| AFairbairn | "Jut did a really crude test, the image displays as it should, green in the cracks, green algae or whatever it is on the fence. The small panel in f..." | Read more » | almost 9 years ago | |||
| AFairbairn | "Chris, Thank you again for all the great information. I would assume the filter you found on PeauProductions website is the one in the lens I purch..." | Read more » | almost 9 years ago | |||
| cfastie | "Ned listed some resources of spectral reflectance data of common things in this note: https://publiclab.org/notes/nedhorning/11-01-2013/why-a-red-f..." | Read more » | almost 9 years ago | |||
| cfastie | "PeauProductions has this filter here: This must be a dichroic filter. The narrow bands could produce good results. We don't know how much cross ..." | Read more » | almost 9 years ago | |||
| AFairbairn | "Chris, Thank you for your comments. I realize I should have provided a bit more information. Unfortunately a multispectral imager was not in my bu..." | Read more » | almost 9 years ago | |||
| cfastie | "It would be good to know something about the camera and filter you are using. Do you have a spectral curve for the filter? How is the camera white ..." | Read more » | almost 9 years ago | |||
| Monoxyde | "Thank you, I thought, that by offering to plugin a VIS photo plus a NIR photo, Shooting by two identical cameras with the same parameters ISO etc ...." | Read more » | over 9 years ago | |||
| cfastie | "I am not sure what your question is. You could use the two-camera feature of the plugin but give it the same Wratten 25 photo for both the VIS and ..." | Read more » | over 9 years ago |