Computing motion in the primate's visual system

Computing motion in the primate's visual system.

Computing motion on the basis of the time-varying image intensity is a difficult problem for both artificial and biological vision systems. We will show how one well-known gradient-based computer algorithm for estimating visual motion can be implemented within the primate's visual system. This relaxation algorithm computes the optical flow field by minimizing a variational functional of a form ...

Neural Mechanisms of Visual Motion Perception in Primates

A large extent of the posterior cortex of the primate found that are direction selective (Figure 1). Direction brain is devoted to vision, and it contains two general selectivity refers to the fact that these cells respond streams that process visual information. The one stream best when a stimulus moves in a particular direction is situated more ventrally in the cortex and is important within ...

Trans-synaptic Retrograde Degeneration in the Visual System of Primates.

Although the first observations of trans-synaptic degeneration in the nervous system were made in the nineteenth century, the phenomenon has been something of an infrequent curiosity. From an experimental point of view it is not a particularly attractive field for study due to the time required for the full effects to become evident and may entail many months or even years of waiting. Consequen...

Motion blur and motion sharpening in the human visual system

The effect of motion sharpening upon blur discrimination thresholds was examined for a range of speeds and blur widths. Blur discrimination thresholds were measured for drifting edges whose blur was either physically or perceptually constant. Under conditions where edges were kept at a constant physical blur width, discrimination thresholds rose as a function of speed as previously reported. Ho...

Occam algorithms for computing visual motion