Is the site of non-linear filtering in stereopsis before or after binocular combination?

@article{Wilcox1996IsTS,
  title={Is the site of non-linear filtering in stereopsis before or after binocular combination?},
  author={Laurie M. Wilcox and Robert F. Hess},
  journal={Vision Research},
  year={1996},
  volume={36},
  pages={391-399}
}
There is recent evidence that both linear and non-linear filtering operations subserve stereoscopic localization. For example, for spatially band-pass stimuli, the overall Gaussian envelope, which is not explicitly represented by the output of linear filters, can provide coarse disparity information. Here we ask three questions about the nature of this non-linear processing in stereopsis. First, is the site of the non-linearity before or after binocular combination? Second, is the stimulus… CONTINUE READING