| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "The mirror arrays are looking more and more attractive because of their light-efficiency and compactness. Also, since I can now order cast and hig..." | Read more » | about 10 years ago | |||
| cfastie | "Ivan, Yes, the plugin to make the file pairs list requires some study. It also requires that you have: synchronous pairs of VIS and NIR photos al..." | Read more » | about 10 years ago | |||
| ivalethia | "I belive the problem is in the first plugin ("Create dual image list" ), 'cause I don't understand from where this file (list) comes, do I create i..." | Read more » | about 10 years ago | |||
| cfastie | "Let us know which parts of the user guide (PhotoMonitoringPluginGuide.odt, at Github) you need help with. Chris " | Read more » | about 10 years ago | |||
| ivalethia | "Hi Chris (@cfastie). Can you help one more time? I can't make it work with the plugin in Fiji (also in ImageJ), could you put it in simple words ho..." | Read more » | about 10 years ago | |||
| ivalethia | "After add the IRCut filter in the IPCam, with the GIMP (@Warren) method, I get this: It looks like go better according the color scale (except t..." | Read more » | about 10 years ago | |||
| cfastie | "Okay, I think I understand now. What you did is: remove IR block filter from a camera take a photo take the same photo with exposed and developed..." | Read more » | about 10 years ago | |||
| ivalethia | "Hi Chris (@cfastie). This pictures (the third in every serie of 3) are not produced directly from the camera, as you say. First, I take a picture w..." | Read more » | about 10 years ago | |||
| cfastie | "Replacing the camera's IR block filter with exposed, developed, color print film allows only near infrared light to be captured. These IR photos ar..." | Read more » | over 10 years ago | |||
| cindy_excites | "Gracias por esto! Muy interesante! " | 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 | |||
| eustatic | "cool " | Read more » | over 10 years ago |