Review of applications of 1D and 2D S transforms
Mark Eramian, Robert A. Schincariol, Robert G. Stockwell, R. P. Lowe, Lalu Mansinha · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1997
Gaussian modulated sinusoids are used in S-transform to extract time-local and space-local spectral information. Similar data sets recorded at neighboring spatial locations may be used with cross spectral analysis to determine frequency localized velocity spectrum. The 2D S-transform is used in image analysis for space localized wavenumber spectra. Local changes in the image spectrum are used to define textural boundaries on images. This paper summarizes several of the research projects involving S-transforms currently in progress at the University of Western Ontario including the application of the 2D S-transform to texture analysis, recognition, and the classification of images.