If you are referring to a scale of 0-255 that would be gray levels. In Ps, curves can be set to use/display one or the other.
~ Keith
Keith Schreiber
On Feb 17, 2014, at 4:31 PM, paulmwhiting@... wrote:
More specifically: at the bottom of the Calibration Mode file bundled with QTR is a 21-step grey scale... below it are two rows of numbers. The first row is pretty clear, simply a percent scale. But what does the second row represent? Density, perhaps? In which case, where would the decimal point be? Would the numbers then read from 1.6 to 0.0?
TIA!
Paul