Hi all,

I am in the process of trying to calibrate my Sony A6000 Uv camera. I have measured a set of pastels with a spectro and generated a cone mapping model from chart (same pastel chart .mspec image). However, my R2 values are way lower than .98, between 0.72(UV) and 0.86(LW).

There is some noise resulting in negative values in my spectro measuremts. Could this be the problem. To remedy this do I need to remeasure and make sure my black point is more accurate. Note, that the noise is at the short end of the spectrum ~300nm.



Low R2 values in cone mapping model
jolyon Answered question June 9, 2021