Abstract
In a detection task low and high spatial frequencies are processed in a characteristically different manner by the human visual system. This conclusion is drawn from reaction time experiments in a simple detection task using supra- and subthreshold sinusoidal gratings exposed with various onset asynchronies. The main properties of the mechanism which principally processes lower spatial frequencies are: a short delay time, a transient step response (temporal band pass filter), and a nonlinearity even near threshold, while the properties of the mechanism which processes higher spatial frequencies ( greater than 3 c/deg) is characterized by a long delay time, a sustained step response (temporal low pass filter), and linear behavior near threshold.
| Original language | English |
|---|---|
| Pages (from-to) | 80-84 |
| Number of pages | 5 |
| Journal | Photogr Sci Eng |
| Volume | 22 |
| Issue number | 2 |
| State | Published - 1978 |