isoluminant

isoluminant

Possessing the same luminance. Example: red and green bars of a grating which have the same luminance. If such a grating is moving sideways, many observers will barely perceive its motion or fail to notice it altogether. Syn. equiluminant.
References in periodicals archive ?
a presents the original picture which is made up entirely of isoluminant colors (i.
A very obvious and already discussed issue is the problem with the isoluminant colors: how to make them visually perceptible and distinguishable after the greyscale processing, on what criteria an isoluminant component should be brighter or darker.
It basically controls the direction in which the isoluminant colors are being made distinguishable, either by increasing in brightness or in darkness.
But if the chrominance difference happens to be bigger than the luminance, it means that there is the possibility at looking at two isoluminant color values, and so the Challenge1 comes into focus.
In contrast, the HCL version shows an isoluminant gray in the desaturated version.
In theory, this can also be achieved by printing the figure on an isoluminant background.
Flicker photometry: Prior to commencing the experiment flicker photometry was used to adjust the energy of the green and blue-green cues to be approximately isoluminant with the grey frames.