1. A quantization method for oversampled signals, wherein the quantization method produces enhanced images, comprising: (a) pruning search space by exploiting redundancy, wherein the pruning results in minimizing searches based upon clusters of possible sampling vectors, wherein the clustering is done offline; (b) minimizing correlation based on the minimized searches; (c) decreasing reconstruction error as a function of oversampling ratio based on clusters of sampling vectors; and (d) wherein the quantization is modeled as a nonlinear integer over an infinite space.