What I want to do
My goal is to make nvdi images of farmland. Hopefully the quality will be good enough to help farmers locate plant stress in the field. I think the best quality NDVI images will be made with two cameras. I'm using two canon a2500 cameras. The reason for a2500: the cheapiest canon camera i could buy.
My attempt and results
Usual steps for the camera remove: IR filter. It is difficult to get a watter 85A filter arround here. So I use a massa 850 nm IR filter.
Original Visible picture:
850nm filtered image:
processed with Ned Horning Fiji tool, float:
suggested cfastie lut:
The result looks good even I had to hold the two cameras in my hand, these pictures are not with the rig below.
Setup of two cameras.
Questions and next steps
These pictures where taken without changing any exposure setting ofthe camera. For now chdk was only installed for the raw camera capability. I'm wondering if I should take pictured with shutter speed and focal lenght locked for both camera. Or should I leave the cameras to decide what to do by them self.
Next steps: + test with 750 nm IR filter + test with locked shutter speed and focallenght for both camera using chdk + Modify my bixler2 drone to support both cameras with battery.
Why I'm interested
Our most important daily life thing is food and water. I think we need to find ways to help farmers get the best yeild they can while using resources where they are needed, water , firtilizer, pesticide. If you look how much area a farmer needs to cover, a bit of help is needed.