ISO 20462-1:2005 provides an overview of psychophysical elements used to estimate pictorial still image quality. It defines just noticeable differences (JNDs), explains how observer characteristics, stimulus properties, instructions, viewing conditions, and experimental duration affect results, and provides guidance for selecting appropriate psychophysical methods. The standard also outlines reporting requirements and discusses paired comparison, triplet comparison, quality ruler, rank ordering, categorical sort, and magnitude estimation methods.
Application Scope: Use for designing, conducting, documenting, and comparing subjective image-quality experiments involving cameras, displays, image-processing algorithms, photographic systems, and related imaging technologies.
