Example image of eyePlorer eyePlorer map for 'Just-noticeable difference': Psychophysics Ernst Heinrich Weber Gustav Fechner Weber–Fechner law Pitch (music) Continuum Stanley Smith Stevens Detection theory MacAdam ellipse BEF (image format) Limen Comma (music) Mired HDR PhotoStudio Sensory threshold Color difference Cent (music) Color vision BND Law of comparative judgment Inferior colliculus Pairwise comparison Harmonic series (music) Film speed Countersteering Color temperature Color blindness List of unusual units of measurement