Moiré measuring method is used widely throughout medical protocols, especially in the field of spinal diagnostics. In this article we will present an image processing method (written in National Instruments™ LabVIEW™ environment) to extract the height coordinates of a human back, by using the information provided by the moiré phenomenon formed on the surface. These data can be used to improve the accuracy of the two-dimensional deformation analysis (e.g. determination of Cobb Angle), or the relevance of three-dimensional aberrations (such as vertebral protrusions).