Pixel Averaging and Edge Enhancement

High-pass filtering (correct)

Low-pass filtering

Masking

Edge enhancement

When frequencies of areas of interest are amplified and other frequencies suppressed

When more pixels in the neighborhood are included in the signal average

When frequencies are masked resulting in the loss of small details

When fewer pixels in the neighborhood are included in the signal average (correct)

To remove high-frequency noise (correct)

To increase contrast and edge enhancement

To amplify frequencies of areas of interest

To suppress frequencies resulting in the loss of small details