MorphologicalPerimeter

MorphologicalPerimeter[image]
picks out the morphological perimeter of regions of foreground in image.

treats values above t as foreground.

MorphologicalPerimeter 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 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, corresponding to a black background.

Find the boundary of foreground objects:

Specify an intensity threshold:

Find the boundary of foreground objects:

Out[1]=

Specify an intensity threshold:

Out[1]=

This returns only foreground pixels that are 4-connected to the background, effectively finding an 8-connected perimeter: