At which of the following scenarios averaging filters is/are used?(a) In the reduction of irrelevant details in an image(b) For smoothing of false contours(c) For noise reductions(d) All of the mentionedI have been asked this question in an online quiz.Origin of the question is Smoothing Linear Spatial Filters in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing

At which of the following scenarios averaging filters is/are used?(a)

1.	At which of the following scenarios averaging filters is/are used?(a) In the reduction of irrelevant details in an image(b) For smoothing of false contours(c) For noise reductions(d) All of the mentionedI have been asked this question in an online quiz.Origin of the question is Smoothing Linear Spatial Filters in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing
Answer» RIGHT choice is (d) All of the mentioned For explanation I would say: Averaging filter or smoothing LINEAR spatial filter is used: for noise REDUCTION by REDUCING the sharp transitions in gray LEVEL, for smoothing false contours that arises because of use of insufficient number of gray values and for reduction of irrelevant data i.e. the pixels regions that are small in comparison of filter mask.

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