Receptive Fields

• Your eyes work with receptive fields.
• What goes down the optic nerve is a signal that a receptive field is active.
• The fields are oval and of varying sizes.
• They are on centre off surround, or off centre on surround.
• The neurons associated with a field responds optimally to this, but less with a less perfect pattern.
• For an on centre off surround, it responds less when there is less on in the centre, or more on in the surround.
• Most vision research isn't interested in this, as they get what they need from simple projections, though it's now being used in some vision deep nets.