The use of imaging colorimeter systems and associated analytical software to assess display brightness, color uniformity, and contrast, and to identify defects in displays, is well established. A fundamental difference between imaging colorimetry and machine vision is imaging colorimetry's accuracy in matching human visual perception for light and color uniformity (and non-uniformity).

In this paper, we describe how imaging colorimetry can be used in a fully-automated testing system to identify and quantify defects in high-speed, high-volume production environments. We cover the test setup, and the range of tests that can be performed, spanning simple point defect detection through complex mura detection and evaluation.

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