A model describing the envelope of visual spatial sensitivity as a function of retinal velocities has been revisited. This spatiovelocity CSF model has been extended to include the effects of three types of eye movements: natural drift, smooth pursuit, and saccadic. Together, these extend the model from retinal velocities to image plane velocities in the context of natural viewing conditions. It is more straightforward to incorporate the effects of eye movements in a spatiovelocity CSF than in a spatiotemporal CSF generated from counterphase flicker stimuli. However, once the eye movements are incorporated, the spatiovelocity CSF can be rotated into a spatiotemporal CSF that is valid for unconstrained natural viewing conditions. The resulting visual model will be analyzed with respect to some of the key HDTV and computer graphics display formats.
Scott J. Daly, Scott J. Daly,
"Engineering observations from spatiovelocity and spatiotemporal visual models", Proc. SPIE 3299, Human Vision and Electronic Imaging III, (17 July 1998); doi: 10.1117/12.320110; https://doi.org/10.1117/12.320110