Spatial frequencies in the visual system

The fact that the nerve cells in the primary visual cortex respond selectively to the orientation (angle) of brightness edges has been known since the work of Hubel and Wiesel (1962). It was later discovered that these nerve cells also react to stripe patterns and that their response depends on the distance between the stripes and thus on the “spatial frequency” (the reciprocal of the period length).

Motivation for this AI blog

The topic of “Artificial Intelligence” – AI – will have drastic impacts on all aspects of life in the coming years. It has the potential to take on a significant amount of work for us humans, making us more productive and allowing more time for the enjoyable things in life. However, AI can also destroy lives and limit freedoms, for example, when used for weapons systems or building totalitarian surveillance states. It’s not the AI itself that produces these negative consequences, but rather the human users of these AI systems.