UC Santa Barbara
Peripheral Representations: from Perception to Visual Search
- Author(s): Deza, Arturo
- Advisor(s): Eckstein, Miguel P.
- et al.
The human visual field is composed of a high acuity region at the center of gaze called the fovea, and
its complement, the visual periphery. Not much is known about the computations and representations
of the visual periphery, as most of the focus in the field of human (and machine) vision is geared towards
foveal vision. Thus, the focus of this thesis will be on understanding the computations performed by
the human visual system in the visual periphery. In doing so, I will begin by modelling the perception
of clutter and how it changes as a function of the behavioural task and point of fixation, developing
a collection of foveated clutter models that enhance non-foveated models. I will then propose a new
metamer model that renders how the information is distorted in the visual field, and what this tells us
about the computations done in the visual periphery. Finally, I will conclude with the design of two
hybrid man-machine collaborative visual search systems that try to overcome the limitations in human
visual search imposed by the visual periphery and observer inefficiencies in terminating exploration.