1. A method of measuring warpage of a sample having a first region of a first surface reflectance and a second region of a second surface reflectance comprising: projecting a dynamic fringe pattern onto the first and second regions, wherein the dynamic fringe pattern comprises an intensity distribution based upon the first surface reflectance and the second surface reflectance; capturing phase-shifted fringe images of the dynamic fringe pattern reflected from the first and second regions of the sample; generating a wrapped-phase image from the phase-shifted fringe images; unwrapping the wrapped-phase image to obtain an unwrapped-phase image; and converting the unwrapped-phase image into a displacement image indicative of warpage of the first region and the second region of the sample.