Maximum Entropy Method for Low Contrast Images

Details Maximum Entropy Method for Low Contrast Images Maximum Entropy Method for Low Contrast Images

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jkas...27..191c&link_type=abstract

Journal of the Korean Astronomical Society, vol. 27, no. 2, p. 191-201

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Technique: Image Processing, Infrared:Interstellar, Sun:Photosphere

Scientific paper

We propose to use the entropy of power spectra defined in the frequency domain for the deconvolution of extended image. Spatial correlations requisite for extended sources may be insured by increasing the role of power entropy because the power is just a representation of spatial correlations in the frequency domain. We have derived a semi-analytical solution which is found to severely reduce computing time compared with other iteration schemes. Even though the solution is very similar to well-known Wiener filter, the regularizing term in the new expression is so insensitive to the noise characteristics as to assure a stable solution. Applications have been made to the IRAS 60 micrometer and 100 micrometer images of the dark cloud B34 and the optical CCD image of a solar active region containing a circular sunspot and a small pore.

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