Question: Question infragram kit

I need some help with your questions.
What is the name of the product you bought from Public Lab?
Do you want to modify the camera on your DJI Phantom 3?
Do you want to open up that nice camera and remove the IR cut filter and replace it with a filter from the Infragram filter kit?
I don't know how hard it is to replace the IR cut filter in that camera. I don't know how good the photos are after the filter has been replaced.
The formula for NDVI is (NIR-red)/(NIR+red). I don't know how to compute NDVI in Photoscan.

Chris

Hi Chris, thanks for the reply. The kit "DIY Plant Analysis Filter Kit" consists of a red and a blue gelatin. Yes, I want to change the Phantom camera 3, in fact I have already done, the first question that I was born (I'll put the blue one or the red one?) I put the red. But to have the possibility of a variety of use, I would remove it and insert it into the filter that is in front of 'goal, but I do not know if this can be done. In short, to do some 'of experiments with different types of filter. I send you a picture made at a height of about 60 meters with the change I made. Then tell me if it is of acceptable quality? I build drones and I have a lot of experience on this field of optical change. Kind Regards

Where can I send pictures?

Mario,
After the internal filter has been removed, a new filter can be used either inside the camera or in front of the lens. It's hard to keep the filter clean and free of scratches when it is in front of the lens, but it makes it easy to test filters. The red filter has some advantages over the blue filter: https://publiclab.org/notes/nedhorning/11-01-2013/why-a-red-filter-should-work-well-for-ndvi

Photoscan can stitch photos together and output a single composite image. That image could be converted to NDVI using the Photo Monitoring plugin for Fiji: https://publiclab.org/notes/nedhorning/01-13-2016/packaged-photo-monitoring-plugins-available-on-the-github-repositoy

Photos can be dragged into research notes or comments. The photo will be uploaded and code will be inserted into your text where the cursor was. Click "Preview" to see your photo.

Chris