imagej
imagej


Author Comment Last activity Moderation
liz "@liz awards a barnstar to nedhorning for their awesome contribution! " | Read more » almost 2 years ago
sl_axe "Thank your for this tool Ned. I am trying to create NDVI animations/videos using FIJI and the Photo Monitoring plug in. Here is my workflow: I r..." | Read more » about 2 years ago
cfastie "A few different cameras were used to take those photos. Most of the cameras were Canon PowerShots. I think all of the photos were saved by the came..." | Read more » over 3 years ago
sjmanosalvas " Hello @cfastie , It's a good post, you have good photos. I'm new in photo monitoring. I have a question which camera do you use to take this imag..." | Read more » over 3 years ago
Tasos " Hey jtuhtan ! I'm trying to create a colormap like yours in matlab, but cannot figure it out how to change half of the color range (from -1 to 0)..." | Read more » over 3 years ago
suman "Hello Ned, I tried using different exposure settings now, and its working, the pixels aren't saturated anymore. Thank you so much for your prompt ..." | Read more » almost 5 years ago
nedhorning "Hi Suman - Using Analyze => Measure should work. It's not uncommon to have high pixel values for bright targets. In fact if the exposure isn't s..." | Read more » almost 5 years ago
suman "Thank you so much for your prompt response Ned... " | Read more » almost 5 years ago
suman "Ohh I get it now. Actually the data has 3 calibration target, but i plan to increase it to 5 targets. I also wanted to know, how i can manually me..." | Read more » almost 5 years ago
nedhorning "Hi Suman - The values from 0 - 1 have been scaled from the original image. The reason I do this is that some image pixel values range from 0 - 255 ..." | Read more » almost 5 years ago
suman "Dear Ned Horning, I calculated image calibration coefficients, using the reflectance data from department's spectrometer and 3 calibration targets..." | Read more » almost 5 years ago
reversevector "I'm using an SJCam 4000, it's a cheap GoPro clone. It doesn't have custom white balance settings so I'm using incandescent with a red filter. I'm a..." | Read more » about 5 years ago
suman "I was curious to know which modified camera do you use? For my case, i am testing with Modified Mobius actioncam with wide angle A lens 87mm. If yo..." | Read more » about 5 years ago
reversevector "I'm also using VGYRM although I sometimes have to stretch the NIR value to get good results. " | Read more » about 5 years ago
suman "The macro was developed by Frank Aldiuos, a member of public labs. It basically is doing same thing as processing from the directory where all the ..." | Read more » about 5 years ago
reversevector "The Photo Monitoring plugin already has a command that generates NDVI from a folder full of images (Single image index processing from directory). ..." | Read more » about 5 years ago
cpegus "GIS and Icebergs - Hi Ned, I am a PhD student doing my research work on remote sensing of icebergs-- I am not sure if you will get this message but..." | Read more » over 5 years ago
nedhorning "Hi - Using 440nm seem reasonable but I'd probably increase the NIR value to 760nm or beyond or something like that since the peak is probably beyon..." | Read more » almost 6 years ago
carolccarvalho "Hello, @nedhorning, for the Rosco Roscolux #2007 Storaro Blue Gel Filter, with the following datasheet Could I just use the visible reflectance ..." | Read more » almost 6 years ago
Davidkao "Thank you very much for the advice Chris and Ned, I have learned a lot. I will continue to this research, so if possible if I encounter any problem..." | Read more » almost 6 years ago
cfastie "David, When using a blue (#2007) filter, the red channel records NIR and the blue channel records visible blue light which is used to compute NDVI...." | Read more » almost 6 years ago
nedhorning "Hi David - This is an interesting project. The reflection of the glass should affect the results as long as the reflection is not in the area of yo..." | Read more » almost 6 years ago
Davidkao "Hello, @nedhorning, I had recently been researching about NDVI and came across your amazing calibration plugin. It works great; however I have a fe..." | Read more » almost 6 years ago
cfastie "I couldn't follow the arguments in that paper, so I don't know whether their modified NDVI formula is valid. They know the spectral sensitivity of ..." | Read more » about 6 years ago