| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Artichoke23 | "@Claytonb, This is a great post and comparison. I have a couple questions, I'm using the V2 NoIR Raspberry Pi camera and #2007 filter they provide ..." | Read more » | about 8 years ago | |||
| cfastie | "This is a great discovery. It will be good to learn how this color works with a red filter like Wratten 25. I will keep my eye out for Boom Chicka ..." | Read more » | over 8 years ago | |||
| everydayduffy | "Thank you @Claytonb. " | Read more » | over 8 years ago | |||
| Claytonb | "@everydayduffy -For the above comparison I used the calibration option in Pix4D pro. It consisted of drawing a region of interest on the image of t..." | Read more » | over 8 years ago | |||
| everydayduffy | "Thanks @Claytonb for this really interesting post. Could you detail a bit more about how you calibrated your images with reflectance targets please? " | Read more » | over 8 years ago | |||
| warren | "I really liked this note too! I'm interested in how this dataset could be used as a "test set" for software development as well. There are a range ..." | Read more » | over 8 years ago | |||
| Claytonb | "Hi Alex, I would recommend contacting Charlie Langlois at Labsphere- clanglois@labsphere.com They can make affordable($300 range)targets that are s..." | Read more » | over 8 years ago | |||
| admaltais | "Hi Claytonb, Really interesting analysis. I currently use a Canon S110 modified by Sensfly for NDVI and I wondered if there could be a big differen..." | Read more » | over 8 years ago | |||
| nedhorning | "Here are a couple links that should help you get started: https://publiclab.org/wiki/infragram https://publiclab.org/notes/mlamadrid/12-08-2015/pho..." | Read more » | over 8 years ago | |||
| ino | "hello, I have a infrared-visible camera, how i get the NDVI image? " | Read more » | over 8 years ago | |||
| bortek | "Thanks Clayton. I am on it now. :) " | Read more » | over 8 years ago | |||
| Claytonb | "@bortek -the blue in the NDVI image is related to the value of the color LUT I applied to the image during processing. I did that to help me to see..." | Read more » | over 8 years ago | |||
| bortek | "@Claytonb - I am planning to start with a single camera and do some initial testing and learning before I go over to two cameras. Yes the focusing..." | Read more » | over 8 years ago | |||
| Claytonb | "Here is a similar scene with the Event38 at about the same height. This is with f/4, exp 1/1250, ISO 100 " | Read more » | over 8 years ago | |||
| Claytonb | "@bortek -I am assuming that the noise is partly due to the filter thickness and light requirement. I believe the Event38 filter is 0.5mm thick and ..." | Read more » | over 8 years ago | |||
| bortek | "This is really interesting. I have read Ned's article too and it is clearly better contrast when using red filter versus blue. I have just receive..." | Read more » | over 8 years ago | |||
| DFlores6073 | "I use Fiji with the photomonitoring plugin...I would like to create a legend with the values, what would be AWSOME is to have the values on the ima..." | Read more » | almost 9 years ago | |||
| jtuhtan | "Hi David, The code I used was MATLAB, overlaying an image of the Fastie colormap onto the NDVI image. What software are you working with? " | Read more » | almost 9 years ago | |||
| DFlores6073 | "Jeff (Jtuhtan) could you please direct me to the right place so I can create a legend with values on my NDVI photos... Thank You David " | Read more » | almost 9 years ago | |||
| cfastie | "I don't know the specs of the blue paper I use for custom white balance. The idea is to flood the blue channel with light (when using a blue filter..." | Read more » | almost 9 years ago | |||
| carolccarvalho | "@cfastie, I'm trying to do the white balancing manually using a Raspberry Pi and I need to know the number of this "pure blue" that you are using. ..." | Read more » | almost 9 years ago | |||
| Tbtouaki | "Hi @Jakub I re-read lots and lots of posts here, but basically depending on the IR filter you use, you should use a color card, a red card to set ..." | Read more » | about 9 years ago | |||
| Jakub | "Hi! @Tbtouaki Could You explain, how You calibrated the WB on Your camera? Best regards, Jakub " | Read more » | about 9 years ago | |||
| Jogomez74 | "Cfastie and Agustin If we try to change de index co-dominium? I mean 0 to 1. And the equation of NDVI index must be.. NDVI 1= (1/2)(NDVI+1) = (1/2)..." | Read more » | about 9 years ago |