SPECKLE PHOTOGRAPHY FRINGE ANALYSIS USING THE DISCRETE HARTLEY TRANSFORM

The two-dimensional Fourier transform algorithm had been previously as sessed to out-perform other existing algorithms in the aspect of analy tical efficacy but not in the area of computing speed when used to num erically process Young's fringe diffraction patterns from double expos ure speckle photographs. In this paper, a two-dimensional Hartley tran sform algorithm is outlined and demonstrated to provide the same level of analytical capability as the Fourier transform algorithm but with improvements in processing speed.