| 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 » | almost 8 years ago | |||
| cfastie | "You can try other colors for doing a custom white balance. See this note: https://publiclab.org/notes/Claytonb/08-13-2016/plant-health-ndvi-white-b..." | Read more » | almost 8 years ago | |||
| spandan1234 | "The NDVI map looks good. But is there anything that can be done to better the results. The information required is totally visible here. Any sugges..." | Read more » | almost 8 years ago | |||
| cfastie | "Your photo looks good. An NDVI image made with the Photomonitoring plugin for Fiji also looks good. That might be a better way to process your phot..." | Read more » | almost 8 years ago | |||
| spandan1234 | "Hi, I have taken some images directly from a Canon SX280 with a red filter. Then I calibrated it using the reflectance from red paper in the shade ..." | Read more » | almost 8 years ago | |||
| cfastie | "Most surfaces reflect both NIR and visible light. Ideally you would have some targets that reflect various amounts of both and you would know the p..." | Read more » | almost 8 years ago | |||
| carolccarvalho | "Hi Chris, thanks again! Which are the surfaces that reflect both blue and NIR light? Could you give me some examples? And about mobius camera, i ..." | Read more » | almost 8 years ago | |||
| cfastie | "1) When you said shortcut, you meant I could for example use a blue led or a blue paint as target? Or do you have another suggestion? An LED or ot..." | Read more » | almost 8 years ago | |||
| carolccarvalho | "Hi Chris, thank you very much for the help! I'll choose better times and avoid shadows the next flight. And I'll try correcting the exposure too! ..." | Read more » | almost 8 years ago | |||
| everydayduffy | "Thank you @Claytonb. " | Read more » | almost 8 years ago | |||
| cfastie | "Those NDVI images look reasonable. Deep shadows are not being handled very well so they are assigned NDVI values of 1.0 (magenta) or apparently -1...." | Read more » | almost 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 » | almost 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 » | almost 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 » | almost 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 » | almost 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 » | almost 8 years ago | |||
| cfastie | "The flexible PVC tubing is exactly the right size to slip inside the third smallest carp pole section. To stiffen the connection I insert a length ..." | Read more » | about 8 years ago | |||
| ggallant | "I'm impressed but I would have been AWED if it had been done with levitation. " | Read more » | about 8 years ago | |||
| tonyc | "You do have a rye sense of humor, Chris. A groan is my highest compliment. Some people prefer laughs, but I'm a groan man. Did you just tape the P..." | Read more » | about 8 years ago | |||
| cfastie | "Thanks, George. Come on Tony, you know the title is the best thing about this note. I'm sure Jeff gave me a barnstar because of the title. Yes the ..." | Read more » | about 8 years ago | |||
| tonyc | ""Graze Anatomy" Groan! What made you use the short pendulum shaft? Just desire to keep it off the ground as much as possible? Or was there somethi..." | Read more » | about 8 years ago | |||
| ggallant | "What a great article!! " | Read more » | about 8 years ago | |||
| cfastie | "Hi Rayishido, They are beautiful mosaics. I didn't have any problem using these images in Fiji. But the Photo Monitoring plugin does not do a very..." | Read more » | about 8 years ago | |||
| Rayishido | "VIS " | Read more » | about 8 years ago |