GS-900™ calibrated densitometer and Image Lab™ software

In the GS-900 densitometer calibration report, what do the Min, Med, and Max values mean?

The Min, Med, and Max values are the minimum, median, and maximum raw count pixel values within each of the step tablet steps.

The GS-900 calibrated densitometer is a 16-bit instrument with 0– 65,536 available grayscale levels. The calibration breaks these levels into a series of groups — the steps of the step tablet. The software calculates the optical density (OD) by creating a curve of counts versus OD. The OD reported is the median OD of all pixels within each step, as calculated from the curve.