In image processing, smoothing an image removes some of the fine detail. This may be used to remove noise or to look at different levels of detail, notably in a Laplacian-of-Gaussian filter. Smoothing filters may be a very simply averaging of an NxN area of pixels, or more complex such as applying a Gaussian filter.
Used in Chap. 7: page 94; Chap. 9: page 124; Chap. 12: pages 165, 166, 172, 181, 187; Chap. 14: page 215
Also known as: smoothing filter, smoothing function
Used in glossary entries: Gaussian filter, image processing, Laplacian-of-Gaussian filter
Applying a 2 x 2 smoothing filter