Image restoration by short space spectral subtraction has been applied recursively to a photographic system in an attempt to increase the signal to noise ratio proportionally to the amount of optical density present. The image is smoothed in the frequency domain a small space at a time based on the power spectrum at a given density level. The method is a variable filter that is a function of photographic density.
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School of Photographic Arts and Sciences (CIAS)
Korte, Rose M., "Image restoration by selective short space spectral subtraction" (1981). Thesis. Rochester Institute of Technology. Accessed from
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