•Background
•Viewpoint Invariant Non-Accidental Properties.
–Lowe sees these as probabilistic.
–Biederman drops this.
–Primitive properties
–Composing them into units/geons.
•Use in Recognition.
–Speed search.
–Geons: analogy to speech.
•Evidence for Value.
–Computational speed.
–Human psychology: parts; qualitative descriptions; view invariance.