Generating the parts of an object

+

“square”

• One way to maintain the constraints between the parts is to generate each part very accurately – But this would require a lot of communication bandwidth. • Sloppy top-down specification of the parts is less demanding – but it messes up relationships between features – so use redundant features and use lateral interactions to clean up the mess. • Each transformed feature helps to locate the others – This allows a noisy channel

pose parameters

sloppy  top-down activation of parts

features with top-down support

clean-up using known interactions

Its like soldiers on a parade ground