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uScope Navigator (Filter Manager) Median Filter
uScope Navigator (Filter Manager)

Information in this article applies to:

  • uScope Navigator (All Versions)

Article ID: NFL1053 — Created: 5 May 2017 — Reviewed: 5 May 2017

Question

What does the medial filter do?

Answer

The median filter is typically used to reduce noise in an image. It replaces each pixel with the median value of neighboring pixels. The median filter (unlike the blur filter) has the effect of reducing noise in an image while preserving edges. It is highly effective in removing impulse (speckles or salt and pepper) noise.

A technique that may have merit for some images involves running a median filter (to remove noise) and subsequently sharpening the image (so the noise is not sharpened).

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