1. A method for identifying one or more objects, comprising: using a computer processing device to perform a fractal analysis on a data set comprised of a plurality of data points having positions distributed in three-dimensions; based on said fractal analysis, identifying at least one object class that is potentially represented by a spatial distribution of said data points, said object class specifying a category of physical object; performing a phase congruency analysis of said data set based on said object class identified by said fractal analysis; and performing a further object identifying step based on said phase congruency analysis.