Opening
Opening[image, ker] gives the morphological opening of image with respect to the structuring element ker.
Opening[image, r] gives the opening with respect to a range-r square.
Opening[data, ...] applies opening to an array of data.
Examples
Apply morphological opening to an image:
Opening[image, 2]Opening with a disk structuring element:
Opening[image, DiskMatrix[3]]Please visit the official Wolfram Language Reference for more details.