Assembly: AForge.Imaging (in AForge.Imaging.dll) Version: 184.108.40.206 (220.127.116.11)
Applied to binary image, the filter may be used for removing small object keeping big objects unchanged. Since erosion is used first, it removes all small objects. Then dilatation restores big objects, which were not removed by erosion.
// create filter Opening filter = new Opening( ); // apply the filter filter.Apply( image );