Another visual illusion involving orientation.

  title={Another visual illusion involving orientation.},
  author={Randolph Blake and K Holopigian and Mandy Jauch},
  journal={Vision research},
  volume={25 10},
The orientation of a grating may be misperceived when that grating appears superimposed within one-dimensional visual noise of a different orientation. An adjustment procedure was employed to measure the size of this tilt illusion and its dependence on noise orientation. The illusion is maximum when the noise and test differ by 20 to 40 deg, depending on the spatial frequency of the test grating. Noise composed of spatial frequencies several octaves removed from the test spatial frequency can… CONTINUE READING