Evaluation of line-type thin-film transistor liquid-crystal display defects based on human visual perception

We propose an evaluation system that assigns each line-type thin-film transistor liquid-crystal display defect a corresponding level that objectively agrees with human visual perception. By "objective," we mean that the evaluation corresponds, on average, with the assessment of a group of inspectors. The basic idea is to use the human visual perception to evaluate defects. Crucial features of defects are selected to represent the human visual perception for the line-type defect. In the process, we define the "just-noticeable difference surface" (JND) and evaluate the level of defect as the distance from a feature point consisting of selected features of the JND. (C) 2008 SPIE and IS&T. [DOI: 10.1117/1.2957879]