sine wave grating

sine wave grating

(sīn) [ L. sinus, curve, fold]
A test pattern to assess visual contrast sensitivity.
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(7) The CSF shows how CS and spatial frequency (SF) are related, an example of which is shown in Figure 2 (page 70) illustrating a sine wave grating. The dark areas (lowest luminance) represent the minima of the wave and the lighter areas (highest luminance) the maxima.
The sine wave grating that is visible to an individual represents their own CSF.
One problem with this technique when using sine wave gratings is that the process is hugely dependent on the responses of the observer.