Fourier smoothing of digital photographic spectra

Details Fourier smoothing of digital photographic spectra Fourier smoothing of digital photographic spectra

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990basi...18...89a&link_type=abstract

Astronomical Society of India, Bulletin (ISSN 0304-9523), vol. 18, Mar.-June 1990, p. 89-96.

Astronomy and Astrophysics

Astronomy

Astronomical Photography, Astronomical Spectroscopy, Data Smoothing, Fourier Transformation, Low Pass Filters, Data Reduction, Digital Techniques, Image Enhancement, Stellar Spectra

Scientific paper

Fourier methods of smoothing one-dimensional data are discussed with particular reference to digital photographic spectra. Data smoothed using lowpass filters with different cut-off frequencies are intercompared. A method to scale densities in order to remove the dependence of grain noise on density is described. Optimal filtering technique which models signal and noise in Fourier domain is also explained.

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