brightness constancy brightness • brightness equation · · · Info · Definitions · Characters · · brightness constancy · · Text Common · · Latin · · Scripts 20 · · Length 5 · · Syllables Definitions · · · (noun) the tendency for a visual object to be perceived as having the same brightness under widely different conditions of illumination. Synonyms: brightness constancy. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079