1. A system residing on a computer readable medium for interpreting dipping surfaces in earth formation from borehole images, comprising: a) a first system for transforming borehole image data from multiple sources to create a description 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 descriptions and the calculated contrast; and d) using said interpretation to characterize a region of said earth formation.