12. The non-transitory computer readable program storage device of claim 11 , further comprising building a training set of 3-dimensional image volumes, and using said training set to train said learning and classification algorithm to recognize object shapes and appearances in said image volumes.
12. The non-transitory computer readable program storage device of claim 11 , further comprising building a training set of 3-dimensional image volumes, and using said training set to train said learning and classification algorithm to recognize object shapes and appearances in said image volumes. 15. The non-transitory computer readable program storage device of claim 12 , wherein said appearance models are derived from said image volumes.