Leonard Evens wrote:
I just tried it again with the -d and -yl options but left out -N. Thistime the L readings seemed to make sense.
Hmm. I'm not able to reproduce this problem with my current code, in which -N works as expected again.
There is still one thing I don't understand. I thought L was supposed to range from 0 to 100. My highest reading was over 105.
It has a value of 100 when it reaches "white". You have to establish a white though, and emissive and display measurements are absolute in cd/m^2, so the L*a*b* conversion "white" value is taken simply 100 cd/m^2. If you use -db or -dw you get to set an actual white value, and both the XYZ and L*a*b* readings are normalized to 100. Graeme Gill.