Bilateral filtering
no vote
Filtering is perhaps the most fundamental operation of image processing and computer vision. In the broadest sense of
the term "filtering", the value of the filtered image at a given location is a function of the values of the input image in a
small neighborhood of the same location. For example, Gaussian low-pass filtering computes a weighted average of pixel
values in the neighborhood, in which the weights decrease with distance from the neighborhood center. Although formal
and quantitative explanations of this weight fall-off can be given, the intuition is that images typically vary slowly over
space, so near pixels are likely to have similar values