grating04_NB300_human
=====================


.. image:: /_static/generated_stimuli/papers.betz2015.grating04_NB300_human.png
   :alt: grating04_NB300_human stimulus example
   :align: center
   :width: 400px






.. py:function:: stimupy.papers.betz2015.grating04_NB300_human(ppd=PPD, rng=None)


   White stimulus (0.4 cpd) masked with 3.00 cpd noise for human experiments from Betz (2015).

   :param ppd: Pixels per degree, used for setting the visual size.
   :type ppd: float

   :returns: * *dict of str* -- Dictionary with the stimulus (key: "img") and additional keys containing stimulus parameters.
             * *Reference*
             * *----------*
             * *Betz, T., Shapley, R., Wichmann, F. A., & Maertens, M. (2015).* -- Noise masking of White's illusion exposes the weakness of current spatial
               filtering models of lightness perception. Journal of Vision, 15(14), 1,
               https://doi.org/10.1167/15.14.1.