| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| nedhorning | "Mathew - Have you been able to find a reflectance plot for those paints? I looked but didn't see it. Other paints I was looking at a couple years a..." | Read more » | about 9 years ago | |||
| mathew | "Rosco manufactures outdoor-grade TV paints including 60% grey (TV white) and black (3%) and chroma colors (blue, green). They would be good choices..." | Read more » | about 9 years ago | |||
| admaltais | "Have you considered using reference charts used to calibrate green rooms in cinema? Some thing like this: labsphere - Reflectance Reference Targets..." | Read more » | over 9 years ago | |||
| warren | "This is something that'd also benefit the general white balance process of Infragram cameras. I wonder, are there any paint sample strips that are ..." | Read more » | over 9 years ago | |||
| nedhorning | "The panel order is not important as long as it's predictable and known. The "ideal" targets would probably be a few gray patches from bright to dar..." | Read more » | over 9 years ago | |||
| warren | "QR code libraries are available in many languages, and most QR code libraries will probably return a location of the center of the code. But maybe ..." | Read more » | over 9 years ago | |||
| nedhorning | "At this point I haven't put much thought into ideal targets mostly because I don't have access to a spectrometer to measure and test different targ..." | Read more » | over 9 years ago | |||
| nedhorning | "When I first started thinking about this a couple years ago I figured auto-detecting the calibration targets would be key but that turned out to be..." | Read more » | over 9 years ago | |||
| warren | "Ah, I see - its the difference between a new paragraph and a <br /> break tag. Thanks for the clarification. Yeah, that makes sense... It'd ..." | Read more » | over 9 years ago | |||
| cfastie | "In markdown, leaving a single blank line between two blocks of content produces a single blank line between the two blocks of content. If you want ..." | Read more » | over 9 years ago | |||
| warren | "Standard for an extra carriage return in Markdown is leaving a single blank line between two blocks of content - that may more sense, or be easier ..." | Read more » | over 9 years ago | |||
| nedhorning | "Yep - that's it " | Read more » | over 9 years ago | |||
| cfastie | "Ned, So like this. We need to make a different file of reflectances for each filter because the filters we were using were very narrow band filt..." | Read more » | over 9 years ago | |||
| nedhorning | "Chris - I'll email you the master list with all of the reflectance values for each target since they aren't really useful without the images. You n..." | Read more » | over 9 years ago | |||
| cfastie | "Cool. Ned, do you have a reflectance csv file for all of the calibration targets in the test photos from iFarm (the lead image)? And a key for whic..." | Read more » | over 9 years ago | |||
| azaelb | "I am doing about the same thing as you: use small quadcopters with small cameras with red/blue filters to analyze NDVI for small farmers. I posted ..." | Read more » | over 9 years ago | |||
| aldehyde | "Hello. how to calculate the chlorophyll content in terms of NDVI? " | Read more » | about 10 years ago | |||
| cfastie | "I posted a note about the new lut. There is a tab delimited file of the colormap in a comment there. I will put the lut file for use in Fiji there ..." | Read more » | about 10 years ago | |||
| silvanhi | "really intersting. i dont no how to make a lut but i'd love to have one. My idea is to mirror the values in the NDVIBlu2red.lut from NDVI 0 to 1 an..." | Read more » | over 10 years ago | |||
| cfastie | "Here is an NDVI image of your latest scene using a new lut I have been trying. I'll post a research note about this lut soon. " | Read more » | over 10 years ago | |||
| cfastie | "Silvan, Your new results look really good. You can probably improve on those settings for any particular scene, but it will require more trial and..." | Read more » | over 10 years ago | |||
| silvanhi | "Thanks Chris for your information. I tried the values from your note initially for the HSV formula but they didn't work out so good so I tried my..." | Read more » | over 10 years ago | |||
| cfastie | "Silvan, Okay, infraBlueNDVI.lut is the same as NDVIBlu2red.lut Infragram does not use the luts that are used in Fiji. Infragram uses its own look..." | Read more » | over 10 years ago | |||
| silvanhi | "Hi Chris, Thanks for your fast answer. 1.) Here is the infraBlueNDVI.lut; I think its quite the same as the NDVIBlu2red.lut 2.) Ok. I use from..." | Read more » | over 10 years ago |