What I want to do
Change external filter on A490 from Rosco 2007 to Wratten 25. Try it for NDVI.
My attempt and results
Photos of conversion and finished change: filter material:
A490 with external filter:
First testing image examples, were shot after custom white balance in shade using red file folder:
Test photos of the community garden at Asbury United Methodist church in Livermore CA.
processed with Ned Horning Fiji tool:
processed with Infragram web tool:
Additional test images show comparable NDVI images in my front yard, shot with Rosco 2007, with improved white balance, and the new Wratten 25 filter; processed with Ned Horning tool with the Chris Fasti lut.
new Wratten 25 filter:
Questions and next steps
Tune white balance or other parameters to improve results.
Why I'm interested
Continue to explore as tool to assess vegetative health.