| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Leksu | "Thanks for the post and comments @warren ! Have you (or anyone else) had luck with other similar cameras since this? " | Read more » | over 4 years ago | |||
| warren | "It was also easily blown out by bright sunlight, which is not a good sign either -- i think it was just hypersensitive to IR. " | Read more » | over 5 years ago | |||
| warren | " " | Read more » | over 5 years ago | |||
| warren | "Quick follow-up about another cheap webcam - this one: https://www.amazon.com/gp/product/B01DRJXAWA/ "ELP megapixel Super Mini 720p USB Camera Mo..." | Read more » | over 5 years ago | |||
| cfastie | "It's a common artifact to get higher NDVI values from the darker areas of foliage in DIY infrared photos. The computation of NDVI depends not only ..." | Read more » | over 6 years ago | |||
| warren | "Great question -- I used tags to add the prompt for posting replications; if you're willing, would you mind posting your results using the button a..." | Read more » | over 7 years ago | |||
| cfastie | "You are correct that this is not really an extraction. It's just plant material chopped up finely in a blender with some liquid. I also did this wi..." | Read more » | over 7 years ago | |||
| iamkat | "Hi, I tried to re-create the lycopene extraction with methanol and ethanol (lab grade) but didn't get anywhere. It's my understanding that they are..." | Read more » | over 7 years ago | |||
| patcoyle | "Good stuff. " | Read more » | over 9 years ago | |||
| warren | "OK - try it out! I don't think it works in the WebGL version but in the basic version it should: http://infragram.org/sandbox/ " | Read more » | over 9 years ago | |||
| cfastie | "I get it now. Your translation is good. The blue is actually a light blue, I think [140 140 255] at 0.56. And I put pure green in there explic..." | Read more » | over 9 years ago | |||
| warren | "Whoa... no, a bit tough to use. If you can describe it as a sequence of colors, the format I mentioned will interpolate gradients between them. Jus..." | Read more » | over 9 years ago | |||
| cfastie | "I'm not sure what a Fiji lut file is. Might be binary. I got the values into a tab delimited text file. NDVI_VGYRM-lut.txt And I was able to cir..." | Read more » | over 9 years ago | |||
| warren | "we only accept certain types of files for upload, for security reasons. I can add .lut, is it an image file or a text file? " | Read more » | over 9 years ago | |||
| cfastie | "I will have to see if Fiji can output the values for a lut. Fiji has a GUI lut editor, so I have no idea what the values are. Maybe Ned can help. H..." | Read more » | over 9 years ago | |||
| warren | "Oh cool! do you want to post your LUT in a numeric format so we can post it as an Infragram.org option? The format is: colormap = segmented_color..." | Read more » | over 9 years ago | |||
| cfastie | "Your new Infragram SD4000 seems to have promise. Here is one with my new lut: . " | Read more » | over 9 years ago | |||
| cfastie | "nbawawa, Yes there is a lot of potentially confusing information in this research note. The note is about a very special case in which photosynthe..." | Read more » | almost 10 years ago | |||
| nbawawa | "hi guys, it's my first post here, sorry for my english but I'm a french native speaker :o) Just to be sure : if well understood, the goal of th..." | Read more » | almost 10 years ago | |||
| mathew | "sorry, I was confused. clearly dual camera. " | Read more » | over 10 years ago | |||
| cfastie | "Mathew, To make sure there is no confusion, the (NIR-Red)/(NIR+Red) formula is not used for the BG3 filter because there is no red visible channel...." | Read more » | over 10 years ago | |||
| mathew | "You and Ned are doing a great job of fleshing out this red vs. blue NDVI issue. thanks. its interesting to me that you can get such clear results..." | Read more » | over 10 years ago | |||
| mark9700 | "Hello Everybody Quite interesting materials ! " | Read more » | over 10 years ago |