Contrast enhancement of time-averaged fringes based on moving average mapping functions

Abstract

Moving average contrast enhancement techniques are applied for visualization of time-averaged fringes produced by time average projection moire The complexity of the problem is based on the fact that grayscale levels at centerlines of fringes depend from the geometrical location of these fringes. Moreover, moire grating geometry determines the direction of sensitivity to dynamic deflections. Standard fringe visualization methods fail to produce interpretable results. The developed pixel-based analysis techniques enable efficient reconstruction of projected fringes.