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Author Comment Last activity Moderation
WhiteRabbit "I found this: http://www.vernier.com/products/sensors/col-bta/ which is interesting because unlike other low-cost spectrometers/colorimeters its s..." | Read more » over 8 years ago
WhiteRabbit "Would acetone or some other solvent dissolve the glue holding on the IR blocker so that it can be removed without shattering it? Is it known what ..." | Read more » over 8 years ago
WhiteRabbit "Ned, Thanks very much for posting this research note. I found it to be helpful background for a related topic (http://publiclab.org/notes/WhiteRa..." | Read more » over 8 years ago
WhiteRabbit "Interesting results! " | Read more » over 8 years ago
WhiteRabbit "Thank you for the very nice write-up. FWIW, it might be that you can get light in a narrower bandwidth from a point source than from an LED: http..." | Read more » over 8 years ago
WhiteRabbit "Here's a write-up that I'm finding quite helpful: http://publiclab.org/notes/nedhorning/11-01-2013/why-a-red-filter-should-work-well-for-ndvi Eyeb..." | Read more » over 8 years ago
WhiteRabbit "Sounds like gel filters would be tricky at best, so I guess ixnay to that. How about this one? http://www.ebay.com/itm/Optical-Interference-Filter..." | Read more » over 8 years ago
WhiteRabbit "Cool! Awesome post. I suppose it's wishful (and probably foolish) thinking, but given the the low price of a filter swatch book and the seemingly..." | Read more » over 8 years ago
WhiteRabbit "Hi Matthew, Thanks! Have you found any additional filter wheels worth considering since making your post? http://publiclab.org/notes/WhiteRabbit..." | Read more » over 8 years ago
WhiteRabbit "Thanks, Chris, for your thoughtful and very informative post. If I'm reading it right, perhaps using two monochrome cameras, each with the appropr..." | Read more » over 8 years ago
WhiteRabbit "" I can try different filters to learn how to make the best plant health images." Which filters have you found that make the best plant health ima..." | Read more » over 8 years ago
WhiteRabbit "So, is it working properly, or is it not? The sample NDVI photos look nice.... " | Read more » over 8 years ago
WhiteRabbit "Interestingly enough, I did just now find this $889 turf grass color meter which does, indeed, use NDVI! http://www.specmeters.com/nutrient-manage..." | Read more » over 8 years ago
WhiteRabbit "Thanks for the links. Supposedly grass also changes color as the soil loses moisture (IIRC, it becomes less green and more blueish?), and people c..." | Read more » over 8 years ago