1. A system residing on a tangible non-transitory computer readable medium for using observed contrast to analyze dipping surfaces in earth formations from borehole images, comprising: a) a first system on a tangible non-transitory computer readable medium for transforming borehole image data from multiple sources to create a composite description independent of tool technology of each feature in a section of said borehole; b) calculating a contrast between the feature and its background; c) interpreting dipping surfaces from the borehole images based upon the feature composite descriptions and the calculated contrast; and d) using said interpretation to characterize a region of said earth formation.