Optimal Test Charts

Thorsten Braun, ColorLogic GmbH; Jodi Alejandro, CrossXColor, Inc.

This paper will discuss the analysis of determining the ideal number of color patches to produce ‘optimal test charts’. A test chart consisting of 8,000 patches does not necessarily mean that the fingerprint or characteristic of an output system is more accurate than using a smaller test chart. How much quality is really gained by increasing the number of patches?

We will introduce a simple formula predicting the expected quality when varying the test chart size and discuss the results.