MorphologicalPerimeter—Wolfram Mathematica 9 Documentation

Details and Options Details and Options

MorphologicalPerimeter[image, ...] yields a binary image in which pixels considered to be on the morphological perimeter have value 1 and others have value 0.
The morphological perimeter is defined to consist of foreground pixels that are directly adjacent to the background.
MorphologicalPerimeter works with binary, grayscale, and multichannel images, as well as real arrays of any rank.
MorphologicalPerimeter[image] is equivalent to MorphologicalPerimeter[image, 0].
MorphologicalPerimeter by default treats all eight pixels surrounding a given pixel as adjacent.
The option setting CornerNeighbors->False treats only the four pixels in the coordinate directions as adjacent.
MorphologicalPerimeter takes a Padding option. The default setting is Padding->0, corresponding to a black background.
MorphologicalPerimeter works with Image3D objects.