Constants

CIE

colour.constants

CIE_E CIE \(\epsilon\) constant.
CIE_K CIE \(\kappa\) constant.
K_M Rounded maximum photopic luminous efficiency \(K_m\) value in \(lm\cdot W^{-1}\).
KP_M Rounded maximum scotopic luminous efficiency \(K^{\prime}_m\) value in \(lm\cdot W^{-1}\).

CODATA

colour.constants

AVOGADRO_CONSTANT Avogadro constant.
BOLTZMANN_CONSTANT Boltzmann constant.
LIGHT_SPEED Speed of light in vacuum.
PLANCK_CONSTANT Planck constant.

Common

colour.constants

DEFAULT_FLOAT_DTYPE alias of numpy.float64
EPSILON
FLOATING_POINT_NUMBER_PATTERN unicode(object=’‘) -> unicode object unicode(string[, encoding[, errors]]) -> unicode object
INTEGER_THRESHOLD Integer threshold value.