Image quality evaluation based on human visual perception

A novel method that evaluates the color uniformity grade of electronic displays using a mura (non-uniform region) index E is presented. The visual perceptual filter is defined by using the color contrast sensitivity function as the extension of CIELAB color system at high spatial frequencies. The non-uniform images captured by a color camera are converted into CIELAB images. The images are transformed into frequency domains, and filtered by the newly defined visual perceptual filter. The experimental results showed strong relations between human sensory evaluation scores and the mura index E values. The experimental results of luminance variation samples are also reported.