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The output of a smoothing, linear spatial filtering is a ____________ of the pixels contained in the neighbourhood of the filter mask.

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The output of a smoothing, linear spatial filtering is a ____________ of the pixels contained in the neighbourhood of the filter mask.

(a) Sum

(b) Product

(c) Average

(d) Dot Product

I got this question in an interview.

My question is based upon Smoothing Spacial Filters in portion Intensity Transformations and Spatial Filtering of Digital Image Processing

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The correct option is (c) Average

Explanation: Smoothing is simply the average of the pixels contained in the neighbourhood.

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