infrared-photography
infrared-photography


Author Comment Last activity Moderation
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 » over 8 years ago
Rayishido "VIS " | Read more » over 8 years ago
Rayishido "Hi, Iam back with some update on the project. I didn't tweak the program but I brought the written 87 filter. and put everything on my phantom 2. ..." | Read more » over 8 years ago
cfastie "That's a good description of what the Rosco blue filter does. Both the blue and the red channels will have a mixture of visible and NIR light. The ..." | Read more » over 8 years ago
Rayishido "Hi! I was in the filed without internet. I wrote a program that trigger the photo on the second pi when a picture is taken with the first so it is..." | Read more » over 8 years ago
cfastie "other areas (not foliage) showed values between 0.2 and 0.9 and I don't know why, since there is no photosynthesis occuring there. Getting high ND..." | Read more » almost 9 years ago
cfastie "Do you know how well synchronized the photo pairs are? Do you have to start them both taking photos at the same time, or synchronize their clocks? ..." | Read more » almost 9 years ago
Rayishido "I am using 2 raspberry Pis (one camera on each) and I synchronize the shutters using interrupts. I had some strange behavior (one Pi taking more pi..." | Read more » almost 9 years ago
cfastie "The NDVI image in my last comment was made by stretching only the NIR channel. The default is to stretch both NIR and VIS and that usually works we..." | Read more » almost 9 years ago
Rayishido "Hi Chris, to obtain this picture you stretched the histogram of the visible or visible and IR. As far as I understand to make NDVI picture a visib..." | Read more » almost 9 years ago
cfastie "Both NDVI images look good. Both seem to have some biological meaning and both have reasonable NDVI values in areas that are shady which is very go..." | Read more » almost 9 years ago
Rayishido "Hi Chris! You assumed right! :D The pictures was taken with the pi noir and the blue filter and turned off the automatic white balance to set my o..." | Read more » almost 9 years ago
cfastie "Rayishido, I assume the orangish photo was taken with the PiNoir camera with a blue filter. By calibration I think you mean you used the AWB_gains..." | Read more » almost 9 years ago
Rayishido "Hi! Thank you very much for your answers! I have downloaded Fiji and it's plugin and will test as soon as possible. This weekend I am going to mak..." | Read more » almost 9 years ago
cfastie "Hi Rayishido, Nice Pi photos. Claytonb is correct about the shadows. It's a common artifact for dark areas to have very high NDVI values. In your ..." | Read more » almost 9 years ago
Claytonb "@Rayishido -the high NDVI values is a normal occurrence with shadows. You will notice that the NDVI values will change in the shadows depending on ..." | Read more » almost 9 years ago
nedhorning "The current version of the plugin only outputs index (NDVI and DVI) images. The plugin only calibrates two bands, a visible and a NIR band and two ..." | Read more » almost 9 years ago
JacobNederend "Thanks for the feedback. I think I misunderstood the function of this plugin. I thought I could calibrate my jpeg R/G/NIR images to a black, a gre..." | Read more » almost 9 years ago
nedhorning "Hi Jacob, To check for aperture you could try another EXIF reader. Maybe "max aperture" is the same as "aperture" but I have no idea. When working ..." | Read more » almost 9 years ago
JacobNederend "Hi Ned, I am really excited about the work you are doing here as it helps resolve some major issues with my grad studies. I have a few questions: ..." | Read more » almost 9 years ago
nedhorning "Unfortunately those values would only work if you had the same materials that I used. To get the reflectance values you would either need to fine s..." | Read more » about 9 years ago
aldehyde "How to get target reflectance values for the visible and near-infrared wavelengths that correspond with the camera filter? Can I use?. 0.7529225,0..." | Read more » about 9 years ago
nedhorning "Hi aldehyde - Did you look at the user guide on Github: https://github.com/nedhorning/PhotoMonitoringPlugin that should have information about crea..." | Read more » about 9 years ago
aldehyde "Please help. If it is possible to describe all the work with the plugin. How to create "сomma-separated variable (CSV) file with the reflectance v..." | Read more » about 9 years ago