Fechner:
Inner psychophysics -mind body problem- relationship between percept and underlying brain processes
Outer psychophysics: relationship between percept and stimulus (distal/proximal) – more tractable
Modern study of perception > Fechner’s “Elements of Psychophysics” > percept (result of causal chain of events that start with a distal stimulus ie object and proceeds through a proximal stimulus ie object’s retinal image, transduction, brain processes, ends with percept of distal stimulus) is completely determined by sensory input > cannot explain the process that allow percepts to be veridical > post-Fechner (Helmholtzian, Structural, Gestalt, Gibsonian) has not been successful > computer vision community > perceptual vision = solution to an inverse problem, depending critically on a priori constraints > usefulness of the Bayesian > studying human perception as an inverse problem