Bayesian inference
•Bayes law: P(A|B) = P(B|A)*P(A)/P(B).
•P(world|image) =   
•                       P(image|world)*P(world)/P(image)
•P(image|world) is computer graphics
–Geometry of projection.
–Physics of light and reflection.
•P(world)  means modeling objects in world.
•      Leads to statistical/learning approaches.
•Problem: Too often probabilities can’t be known and are invented.
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