Sensitivity to contrast modulation depends on carrier spatial frequency and orientation

  title={Sensitivity to contrast modulation depends on carrier spatial frequency and orientation},
  author={Steven C. Dakin and Isabelle Mareschal},
  journal={Vision Research},
We consider how the detection of second-order contrast structure depends on the orientation and spatial frequency of first-order luminance structure. For patterns composed of a bandpass noise carrier multiplied by a contrast envelope function, we show that sensitivity to the envelope varies in proportion to the spatial frequency of the carrier. For oriented carriers at low spatial-frequencies, detection of the contrast envelope is easier when the envelope and carrier are perpendicular, but this… CONTINUE READING


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