2. Object motion
Let's call examples 1-6 "Object Motion", since they all involve objects changing
their positions over time.
Although objects are really moving out in the world, your visual
system infers motion. Often this inference is correct, but someti
4. Motion detectors in area MT
To see the neural mechanisms which underlie our actual percept of plaid-pattern
motion, we need to leave V1 and head to extra striate area MT. MT can be defined
according to the F-A-C-T criteria we have discussed earlier:
5. Observer motion
Information derived from vision is a major guide to our actions; the perception of
motion is especially central to our own movements through the world. (see
examples 7 and 8 at top).
Optic flow and Heading perception: an idea originally
3. Simple motion detectors in V1
How does our visual system infer motion from the variety of cases described above?
We already know from the experiments of Hubel and Weisel that there
are directionally-selective neurons in V1.
Building a directionally-s
Our eyes are constantly making small, fast movements, although your perception
of the world isn't nearly so "jumpy". However, there are ways to make your eye
movements more obvious.
In fact, as we already learned, we know that images stabili