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The windows of Frost filter and morphological closing are set to 3 × 3 and 7 × 7, respectively.
Speckle filters, such as Lee filter and Frost filter, can be used to smooth the speckle noise before segmentation [1, 2].
In comparison, the Frost filter is an exponentially damped circularly symmetric filter, which utilizes local statistics.
These methods include early methods such as Lee filter [ 3], Frost filter [ 4], Kuan filter [ 5], and recently developed methods such as adaptive filters [ 6, 7], wavelet transform [ 8- 11], bilateral filters [ 12], nonlocal-means [ 13] and anisotropic diffusion filters [ 14- 18], etc.
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"Pillars of Frost" is a three-minute drone that sounds like a cathedral organ played backwards, filtered through the Great Atari ST in the Sky and dumped into a deep freezer the size of eight International Space Stations.
Fierce frost, sun, frost.
Hard frost, sun, frost, snow, frost.
Fierce frost, bright & still, frost.
See also frost; precipitation.
Severe frost, sun, sharp wind, bright, frost.
Hard frost, grey, snow, sun, frost.
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