Evaluate Device Linearity
- Determines the linearity of a device (smoothness of transitions between tones in each channel). Calculates linearity from an existing device profile.
A profile is opened up in the Grapher, and plotted as points, with the points limited to a narrow field of primary colors. The straightness of the lines, and the distance between points provide an instant, visual indicator of how linear the profile is.
This information can be used to suggest per-channel ink limits for CMYK profiles.
This can be used for both RGB and CMYK profiles.
Don't forget to uncheck "Tone using L*" to see the darker points more clearly. Choosing primaries & secondaries will add the secondary colors to this 'spider graph' and you can view the results of combinations of colors.