Evaluate Device RGB Calibration
Evaluate the neutral calibration of an RGB device. RGB devices that can be calibrated typically set equal RGB values to gray (eg RGB (100,100,100) -> Lab (45,0,0).
The calibration state at the time of profiling can be calculated from the device's profile.
With a well-calibrated system, you would expect to see the vertical line of neutral points stay very close to the neutral axis in the grapher.
- An example for the use of this test would be to verify the calibration of a Fuji Frontier or a Noritsu digital minilab before profiling targets were run. These are examples of RGB printers that (are supposed to) go through a calibration procedure on a daily basis to bring the printer back to a known state. This test will show how accurate the calibration was at the time of profiling. Think of this as a "peek around" the profile to see how the system's doing.