Before revision: Angular wavenumber , expressed in radian per metre (rad/m), is related to ordinary wavenumber and wavelength by Visual perception In the study of visual perception, sinusoidal gratings are frequently used to probe the capabilities of the visual system .
After revision: , such as contrast sensitivityAngular wavenumber , expressed in radian per metre (rad/m), is related to ordinary wavenumber and wavelength by Visual perception In the study of visual perception, sinusoidal gratings are frequently used to probe the capabilities of the visual system .