| dual_rank | Opening, Median and Closing with circle or rectangle mask. |
| gen_disc_se | Generate ellipsoidal structuring elements for gray morphology. |
| gray_bothat | Perform a gray value bottom hat transformation on an image. |
| gray_closing | Perform a gray value closing on an image. |
| gray_closing_shape | Perform a grayvalue closing with a selected mask. |
| gray_dilation | Perform a gray value dilation on an image. |
| gray_dilation_rect | Determine the maximum gray value within a rectangle. |
| gray_dilation_shape | Determine the maximum gray value within a selected mask. |
| gray_erosion | Perform a gray value erosion on an image. |
| gray_erosion_rect | Determine the minimum gray value within a rectangle. |
| gray_erosion_shape | Determine the minimum gray value within a selected mask. |
| gray_opening | Perform a gray value opening on an image. |
| gray_opening_shape | Perform a gray value opening with a selected mask. |
| gray_range_rect | Determine the gray value range within a rectangle. |
| gray_tophat | Perform a gray value top hat transformation on an image. |
| read_gray_se | Load a structuring element for gray morphology. |