gives the morphological closing of image with respect to the structuring element ker.

gives the closing with respect to a range-r square.

applies closing to an array of data.


  • Closing works with binary, grayscale, and other images.
  • Closing works with 3D as well as 2D images, and also with data arrays of any rank.
  • The structuring element ker is a matrix containing s and s.
  • Closing automatically pads structuring elements to have odd dimensions.
  • Closing[image,r] is equivalent to Closing[image,BoxMatrix[r]].
  • If multiple image channels are present, Closing operates on each of them separately.
Introduced in 2008
| Updated in 2012