1. A band matching method for enabling accurate determination of a disparity between two surfaces using an interferometer, comprising the steps of: (a) capturing an image of first and second surfaces with a pattern of interferometric fringes superimposed over said image and over said surfaces; (b) identifying a discontinuity in a primary fringe that is used for said determination of said disparity; (c) moving a pixel value from an adjacent fringe to said primary fringe to fill in said discontinuity; (d) arithmetically fitting first and second equations to portions of said primary fringe over said first and second surfaces respectively; and (e) determining said disparity between said surfaces based upon said first and second equations.