] Astrophysics Pyramid Image Processing (APIP) is a set of
] multiresolution image processing routines and statistical
] descriptors developed by Dr. Charles H. Anderson at the
] Washington University Medical School in collaboration
] with Dr. William D. Langer at the Jet Propulsion
] Laboratory, California Institute of Technology.
]
] APIP is different from most other multiresolution
] software packages in its emphasis on overcomplete
] non-orthogonal representations. While most scientists are
] more familiar with the orthonormal wavelets, their
] strength is in data compression and not in image
] analysis. Orthonormal wavelets provide critically sampled
] representations with minimal storage, but the constraint
] of orthogonality leads to filter designs that are not
] necessarily the best for image analysis (cf. Strang 1989,
] Simoncelli et al. 1992).