Question: Processing a picture from Rasperry Pi NoIR camera with blue filter and getting NDVI values.

Aezys is asking a question about ndvi
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by Aezys | October 07, 2018 15:32 | #17240

Hi everyone, I would like to know how to get the NDVI image from a picture taken by the Rasperry Pi NoIR camera with a blue filter. I tried using Infragram.

I used a picture from the Rasperry Pi website.

The picture:

image description

I uploaded it on Infragram, clicked on presets, NDVI for blue filters and then colorized. I left the default options that were: Grey, (R-B)/(R+B) and Default Colormap. This is the result:image description

Now, what is the scale of this image and how can I get it? Just so I explain myself, for scale I mean something such the one in this image (found on this website):

image description

And also, is there a way to get the number of the NDVI value for each pixel of the picture?

Thanks in advance.


What I’d like to do is taking some pictures with the NoIR camera, process them and then write some code in Python to get the percentage of healthy vegetation in each image.

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