[PublicLab] Question: infragram and Pi NoIR camera - NDVI not working (#24460)

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Public Lab contributor agentnightingale just asked a question entitled 'infragram and Pi NoIR camera - NDVI not working ':

Help them by posting an answer here: https://publiclab.org/questions/agentnightingale/08-26-2020/infragram-and-pi-noir-camera-ndvi-not-working

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Hi there

I am very new to all this and needs some help to figure out what I am doing wrong.

I am recording images on a Pi NoIR camera with a red filter (also tried a blue filter). I download the images to my laptop and then upload to infragram. I run the preset for NDVI for RED filters - colourized. But all I get is a blue image - see attached screenshot. The image is of shrubs and non-organic matter, so would expect I would be able to see a differential between things. I am really not sure what I am doing wrong?

Any advice to a newbie would be greatly appreciated.

The same image as it came out of the Pi NoIR camera without any presets/changes:

Thanks

Sam

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