Abstract
Two-dimensional S-Transform is an extension of one-dimensional S-Transform. It analyzes the fringe pattern to obtain the useful information from the instantaneous local information in two directions. Due to the application of Gauss Window, time resolution in the time–frequency spectrum is degraded because of the long front taper. In this paper, an asymmetry Gaussian window is introduced in the two-dimensional S-Transform method. With a decreased front taper and an increased back taper for the Gauss window, the proposed two-dimensional S-Transform method can reconstruct the measured object more accurately.
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