September 2012
Intermediate to advanced
232 pages
5h 26m
English
Content preview from Digital Video Processing for EngineersBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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4
Introduction to Digital Filtering
Chapter Outline
Digital filtering is used in different aspects of video signal processing. One application is reducing random noise effects or corrupted pixels in images or video. Finite Impulse Response (FIR) filters can be used to smooth out an image, and to reduce random noise, but the drawback is that it will soften or blur sharp edges in the image.
4.1 Median Filtering
Another type of filter often better suited to reducing noise in an image is the median filter. A median filter is a non-linear filter, which does not use multipliers. It analyzes the image pixel by pixel, and replaces each pixel with the median ...
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