So i am new to this and i have not been able to find a lot of info. this question has three parts. firstly i am using a PI No ir V2 camera with a blue filter to map a field. firstly i keep seeing things that say that it need to calibrate it. What am i calibrating and how? secondly secondly i want to take these photos and stitch them together to create a larger map that i can then process with NDVI. So what is the best software for processing NDVI ? i tried the inframgram.org one but i am looking for the one that shows green as healthy and red as not healthy. Can anyone help a noob out ?
For calibrating the Raspberry PInoIR camera I wrote a gui application to just play around with till I found a good result.
I looked for values that would look as close to a RGB picture as possible but depending on the filter used some colors would look of. The code can be found at https://github.com/PiddePannkauga/PiCameraGui. Run it on the raspberry pi.
The image I have provided shows a good calibration in my opinion. This is using a blue filter that came with the PInoIR. The red gain for white balance is higher than the blue gain. All setups require different calibrations depending on how much light is present when capturing an image.
I just took some colored pieces of paper I found at the office. The paper squares was only added to show other people that I didnt just re color the image but actiaöly took images of different lightwaves than pne can be used to see from consumer cameras.
I also did the calibration by using my gui application where I could manually set the properties of the camera.
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