| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| agustin_castellano | "Sorry is should be (blue- (red-blue)) /(blue+(red-blue)) ?? To extract the nir data in the red chanel. Regards. " | Read more » | about 9 years ago | |||
| agustin_castellano | "Could something like this (blue- (red-blue)) /(blue-(red-blue)) ?? To extract the nir data in the red chanel. Regards. " | Read more » | about 9 years ago | |||
| nedhorning | "Hi Agustin, The formula you wrote is what I use. I typically use the PhotoMonitoring plugin which can be found here: https://github.com/nedhorning..." | Read more » | about 9 years ago | |||
| agustin_castellano | "Hi Ned thanks for your research! Is great this information. i have two doubts. First if i use a red filter how should be the formula (blue - red) ..." | Read more » | about 9 years ago | |||
| agustin_castellano | "Hi Andresc4, i would like be in touch with you.i'm researching about the same like you. I live in Argentina. Please contact me my emailagustin.cast..." | Read more » | about 9 years ago | |||
| agustin_castellano | "Hi Andresc4, i would like be in touch with you.i'm researching about the same like you. I live in Argentina. Please contact me my email agustin.cas..." | Read more » | about 9 years ago | |||
| mathew | "@Jimsford. you gotta print one! Shapeways could run one for you. " | Read more » | about 9 years ago | |||
| jimsford | "where can i get that from? " | Read more » | about 9 years ago | |||
| harrysafraz | "Yes drag and drop would be fine " | Read more » | about 9 years ago | |||
| cfastie | "Oh, that's what's happening. I wondered how it worked at all in Chrome without Silverlight support. In all other browsers you see overlays of zooma..." | Read more » | about 9 years ago | |||
| warren | "Cool, the Photosynth viewer for Chrome is done in HTML5, natively - no plugin! Pretty neat. " | Read more » | about 9 years ago | |||
| homechemist | "Anyway, tomorrow if I have time I am going to upload a new research note on chromatography that i think it will be really interesting for detecting..." | Read more » | about 9 years ago | |||
| homechemist | "Well, actually i cannot tell you exactly the concentration because i have prepared the solution roughly , but i think is more or less between 0,30..." | Read more » | about 9 years ago | |||
| warren | "Very interesting. What was the concentration of the copper solution? " | Read more » | about 9 years ago | |||
| homechemist | "The device is based on the public´s lab one, is one of the project that i posted time ago, the only thing that changes is the calibration(I used tw..." | Read more » | about 9 years ago | |||
| warren | "not large enough to detect most of the functional groups present What range would we need? I understood that the important fingerprint range is 16..." | Read more » | about 9 years ago | |||
| warren | "Wow! metallic solutions tend to block infrared light Really, even under 1000nm? Could this help to detect heavy metal contamination in water, or ..." | Read more » | about 9 years ago | |||
| fjcaceres | "Chris On last thing on the Agribotix site is that they conclude the best filters are the blue ones Javier " | Read more » | about 9 years ago | |||
| cfastie | "@fgiorlando, I assume the Hoya 25A filters are just as good as Wratten 25A filters for infrared photography. The Hoya glass filters would produce c..." | Read more » | about 9 years ago | |||
| cfastie | "There seems to be a lot of marketing hooey at the Agribotix site. They seem to be doing DIY uncalibrated infrared vegetation index work like a lot ..." | Read more » | about 9 years ago | |||
| fjcaceres | "Because I don't really know much about filters, I came across this company named Agribotix that do NDVI and below the next paragraph is their expla..." | Read more » | about 9 years ago | |||
| cfastie | "Stretching the histograms of either the NIR or VIS (or both) channels used to make NDVI is a trick that can produce more meaningful NDVI. I don't k..." | Read more » | about 9 years ago | |||
| kykytos | "@cfastie What do you mean with 'stretching the histogram of the infrablue photo'? Because if it means to reduce blue levels (increase NDVI levels),..." | Read more » | about 9 years ago | |||
| clayton | "Wouldn't you still need a spectrometer with you to calibrate the panel every time you go out into the field to account for varying lighting conditi..." | Read more » | about 9 years ago |