| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Greg, that’s very exciting progress. Your new summary of all the measurements that can be taken with a MultispeQ is excellent. It’s the best descri..." | Read more » | about 10 years ago | |||
| natalie | "This is a wonderful project!!! This might be a great companion to the Infragram Plant Monitoring... " | Read more » | over 10 years ago | |||
| 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 10 years ago | |||
| warren | "Wow chris the barcode scanner filter idea is great!!! " | Read more » | over 10 years ago | |||
| cfastie | "The Public Lab desktop spectrometer is quite capable of making a spectral graph of sunlight reflected from grass. The curve will differ from the pr..." | Read more » | over 10 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 10 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 10 years ago | |||
| cfastie | "I have not seen a cheap filter like Rosco that is truly a narrow band pass filter. It might be possible to combine filters to get a fairly narrow t..." | Read more » | over 10 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 10 years ago | |||
| cfastie | "A filter switcher is a viable solution, especially for small cameras. Cameras as large as Powershots might require a big, precise device in front o..." | Read more » | over 10 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 10 years ago | |||
| cfastie | "It should be possible to distinguish between stressed and non-stressed lawn grass using NDVI. I suspect that the $900 FieldScout performs more or l..." | Read more » | over 10 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 10 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 10 years ago | |||
| warren | "I think a lot of the challenge of using an Infragram camera well is the need for comparison. Comparing an area treated in one way with a "control" ..." | Read more » | over 10 years ago | |||
| karenv | "Wow! Interesting, amazing, and incredibly helpful! " | Read more » | over 10 years ago | |||
| mathew | "I love the in-depth historical storytelling. awesome research and thanks for showing others how to follow your process. " | Read more » | over 10 years ago | |||
| aldehyde | "How can I get the beta version? Free beta tester filled. thank you! " | Read more » | over 10 years ago | |||
| gbathree | "None for sale yet, still working on the beta. Keep an eye on the site for the public release, maybe early next year! " | Read more » | over 10 years ago | |||
| aldehyde | "Hi! When can buy this device? " | Read more » | over 10 years ago | |||
| gbathree | "Yes, it's a little confusing - that's actually one of the hurdles is to quickly and easily explain what this does, and how it works (the how it wor..." | Read more » | over 11 years ago | |||
| warren | "Wow! Sorry, this looks really cool, but what is the device pictured above? Is that a cuvette in it, or a prism or what? Could we emulate the senso..." | Read more » | over 11 years ago | |||
| gbathree | "Awesome! Yes, actually one of the reasons we're going with the Teensy is precisely because of Paul. I've never met him but I've never seen a sing..." | Read more » | over 11 years ago | |||
| mathew | "That's awesome. The Teensy was a good choice (even if the bootloader isn't FOSS) and Paul Stoffregen, the Teensy developer, is a really great guy ..." | Read more » | over 11 years ago |