| Abstract
Classically the visual system sensitivity
has been studied separately as a function of spatial frequency and orientation,
without explicitly pointing out the relation between both parameters. As
the visual system processes two-dimensional signals, its Contrast Sensitivity
Function (CSF) is intrinsically two-dimensional too, and therefore, the
dependence of the 1D CSF on orientation may be obtained by considering
different radial profiles of the 2D CSF.
In the present work, we propose a straightforward
method to obtain the maximum ammount of information about the 2D CSF with
few experimental measures. The results show that for emmetropic observers
two perpendicular radial profiles of the CSF are enough to describe the
behaviour of the function in the whole 2D frequency domain, where as for
the most common astigmatism cases, it is necessary to include another at
intermediate angles. |
