Graeme Gill wrote:
I can't say I really understand what the HCFR folks are doing with their reference
This study was done with MAZeT's MTCS-C2 Colorimeter Board, which even contains sensors with a spectral sensitivity approximating the CIE standard observer, and each board is also factory calibrated (I don't know for which spectrum, but I would at least assume that they are using a lab-grade reference to do the factory calibration). Nevertheless the study show that the factory calibration result in errors of up to 10 delta E when measuring CRT and LCD displays. Only with an individual calibration to the monitor's spectrum, the error could be reduced to about 1 delta E.
So if even approximately colorimetric sensors with an individual let me call it "general-purpose factory calibration" don't work sufficiently well for measuring a display device, I don't want to image how non-colorimetric sensors w/o any factory calibration will work...