Human visual recognition of uniformity variations and other defects in displays is dependent on many factors including brightness, color, shape, size, and severity of deviations within the area of the display. Developed to allow automated visual inspection systems to accurately identify JND—artifacts just noticeable by a human observer—TrueMURA™ evaluates display mura (areas of non-uniformity) in a way that simulates a human observer’s perception of defect severity. These algorithms can ignore mura that is imperceptible to human observers and identify various types of mura that can be passed and failed based on evaluation criteria.
Part of the Radiant Vision Systems TrueTest™ Software family, the TrueMURA license supplements the many benefits of TrueTest Software to efficiently perform image-based measurements for luminance, chromaticity, and adds specific tests to evaluate over 15 types of display mura.
The TrueMURA Software license provides several mura tests in addition to what is offered in standard TrueTest Software. TrueMURA allows users to define a complete set of measurement parameters and set pass/fail criteria for different types, locations, and severities of mura in an image. The software license includes specific tests for identification and measurement of mura types including:
Diagonal Line Mura