A morphological closing was applied to enlarge potential motion regions and merge them with their close neighbors.
Morphological closing is used to remove those holes on the road region.
Thus, morphological closing is applied to the output of connected component extraction to fill the spaces inside the road region.
The windows of Frost filter and morphological closing are set to 3 × 3 and 7 × 7, respectively.
Because the surface has sub-voxel resolution, a morphological closing operation was used to fill in any unlabeled vertices.
For elimination of fake points of image, morphological opening filter is used and for filling holes, morphological closing filter is applied on the image.
Considering that the contour will be initialized inside the target object and inflated afterwards in local segmentation, morphological closing operation is utilized to smooth the binary LSF.
Since morphological closing algorithm is employed after Frost filtering algorithm, the window size of Frost filtering algorithm is set smaller than common size.
In this article, a novel SAR image segmentation algorithm is proposed based on MSER and improved SC. Frost filtering algorithm and morphological closing algorithm are applied to remove noise and enhance input image.
The second step included hole-filling and leakage removal by means of morphological operators: closing is required to fill the holes on the boundaries of breast mask; filling is required to fill the holes within the breasts; and erosion is required to reduce the dilation obtained by the closing operation [19, 20].
