Measurement of the optimum surround ratio inducing the highest perceived image contrast

摘要: Much research has shown that perceived image contrast increases as the surround luminance increases, but a number of recent studies reported opposite trends under higher levels. We measured change in wide range levels covering from dark up to 2087 cd/m2. A large-area illuminator was used illuminate surround. It consists 23 dimmable fluorescent lamps and diffuser. Its maximum is cd/m2 could be adjusted six lower set paired comparison experiments conducted compare perception seven different The results showed varies with found near ratio (SR) 1. As SR 0 1, z score increased, which can fully expected by Bartleson Breneman effect. However, it drastically decreased region > 1; thus, eventually decreased.