An FFT method to optimize the removal of coherent noise in small and large images

Details An FFT method to optimize the removal of coherent noise in small and large images An FFT method to optimize the removal of coherent noise in small and large images

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1027..180k&link_type=abstract

IN: Image processing II; Proceedings of the Meeting, Hamburg, Federal Republic of Germany, Sept. 19-21, 1988 (A90-13895 03-35).

Physics

Fast Fourier Transformations, Image Enhancement, Noise Reduction, Coherence, Halley'S Comet, Optimization, Pixels

Scientific paper

The amplitude, phase, and frequency parameters describing the behavior of the contribution of coherent noise to an image can be removed, after being determined by FFT techniques; small images often obtain disappointing results, however, and noise energy can be distributed over additional frequency locations if the image size is not a multiple of the dominating noise wavelength. Attention is presently given to a method able to improve noise-reduction accuracy through the successive adjustment of image-array size to integer multiples of the actual wavenumbers. Prefiltering routines are applied to the images in both the spatial and frequency domains to optimize the conditions for noninteractive coherent noise removal.

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