Abstract
This report contains two methods to analyze a digital interferometry image. One is a direct method that uses digital image processing techniques to extract fringes of the image. We showed the processing techniques in a specific example applied for composite laminates with a circular hole. The other method is based on the 2-D continuous wavelet transform method to analyze the displacement field. The method is especially useful for analyses of images that contain strain concentration and discontinuous displacement. We showed the advantages of the wavelet transform method over a conventional Fourier transform method by applying it to moiré interference fringe on composite laminates.
