03-3 - Spatial filtering fundamentals

03-3 - Spatial filtering fundamentals - Spatial filtering...

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4/28/2008 1 Spatial filtering fundamentals Spring 2008 ELEN 4304/5365 DIP 1 by Gleb V. Tcheslavski: [email protected] Mechanics of spatial filtering Considering frequency domain filtering, the effect of LPF applied to an image is to blur (smooth) it. Similar smoothing effect can be to an image is to blur (smooth) it. Similar smoothing effect can be achieved by using spatial filters ( spatial masks, kernels, templates, or windows ). We discussed that a spatial filter consists of a neighborhood and a pre-defined operation performed on the image pixels defining the neighborhood. The result of filtering – a new pixel with coordinated of the neighborhood’s center and the value defined by the operation. Spring 2008 ELEN 4304/5365 DIP 2 If the operation is linear, the filter is said to be a linear spatial filter .
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