Subjective brightness during dark-adaptation
article
The course of dark-adaptation was studied with threshold measurements and with measures of the luminance required to maintain a constant supraliminal brightness. A stimulus in the light-adapted right eye was matched in brightness to a stimulus presented to the left eye, which was dark-adapted. Two different methods were used and several levels were tested. The usual transition from cone to rod function observed in threshold measurements is also observed in curves of constant subjective brightness, provided the brightness is of the order of 1 bril, or a luminance in the dark-adapted eye of 40 dB (1.0 µL).
The brightness function (operating characteristic) produced by light-adaptation plus recovery does not correspond identically to the characteristic produced by adaptation to a lower luminance, although the characteristic curves may be rather similar when only cone vision is involved.
The brightness function (operating characteristic) produced by light-adaptation plus recovery does not correspond identically to the characteristic produced by adaptation to a lower luminance, although the characteristic curves may be rather similar when only cone vision is involved.
Topics
TNO Identifier
3833
Source
Vision Research(2), pp. 495-502.
Pages
495-502