Live NDVI

[Colin Taylor]

Hi

Found this board and was hoping you could help with a project i've been looking at for a while now.
I would like to make wireless live NDVI system.

Currently have a MAPIR camera (like a gopro).
[(Also made own infragram canon point and shoot with filter kit)]
This produces a raw filtered image, ready for analysis using infragram code.

My idea is to use infragram code running on a Raspberry Pi to analysis this in real-time, producing an NDVI image.

I.e- Mapir-to-Pi-to-code-to-screen.

I realise that this is essentially the same as a webcam, to computer, to infragram program setup. However like the idea of recreating it with a Pi.

Can it be done? Anyadvice welcome!

Thanks in advance

Colin

[Chris Fastie]

Colin,

I think code on the Pi can open a jpeg and convert it to an NDVI image. I don't know how the photo from the camera can be transferred to the Pi automatically. That part is easy with a webcam (and drivers), but might be harder with some other cameras.

Chris 

[Jeffrey Warren]

Hi, Colin - there are a number of posts on modding the Raspberry Pi camera itself: https://publiclab.org/tag/raspberry-pi which might be easier than an external camera. 

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[Colin Taylor]

Thanks for the replies

The Pi was only to act as a processor of raw images and to run code. 

So would it be easier with a converted webcam and the pi setup?

Essentially want offline NDVI analysis. If anyone has any other ideas for how this could work, they would be greatly received!

Thanks

[Jeffrey Warren]

Not too many webcams convert well -- see this huge grid of tests we did on various webcams a few years ago: https://publiclab.org/notes/warren/09-13-2013/leaffest-infragram-camboard-batch-tests

So I guess I'd recommend trying to use a converted Mobius camera as a webcam, or the Pi camera. But it is possible to take webcam photos from the commandline. And the (pretty old/barebones) Infrapix library might be modifiable for your purposes? https://github.com/p-v-o-s/infrapix

Jeff

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