This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.

# MinFilter

 MinFilter[image, r]filters image by replacing every value by the minimum in its range r neighborhood. MinFilter[data, r]applies min filtering to an array of data.
• MinFilter[image, r] finds the minimum in (2r+1)×(2r+1) blocks centered on each pixel.
• At the edges of an image, MinFilter uses smaller neighborhoods.
• MinFilter[image, {r1, r2}] uses neighborhoods with vertical range r1 and horizontal range r2.
• For multichannel images, MinFilter[image, ...] replaces each pixel by a pixel in its neighborhood that has the minimum total intensity, averaged over all channels.
• In MinFilter[data, ...], data can be an array of any rank.
Use a minimum filter to dilate the darker parts of a color image:
Use minimum filtering to erode thinner objects:
Minimum filter of a vector:
Use a minimum filter to dilate the darker parts of a color image:
 Out[1]=

Use minimum filtering to erode thinner objects:
 Out[1]=

Minimum filter of a vector:
 Out[1]=
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