Mathematical morphology
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Mathematical morphology

This tab offers basic tools for mathematical morphology : operations (dilatation, erosion...) realized on selected ROIs. You can choose the structuring element radius in voxels or in mm and realize 4 types of actions : erosion, dilatation, opening, closure.

Figure 9.4. Mathematical morphology tab

Mathematical morphology tab

Table 9.8. Structuring element radius

ActionDescription

Structuring element radius

The structuring element is shape composed of a set of points. The center of the element is applied in each voxel of the ROI. Here, the structuring element is a neighbourhood with a connexity of 6.

Table 9.9. Distance mode

ActionDescription

mm

The structuring element radius is in mm.

voxel

The structuring element radius is in voxels.

Table 9.10. Mathematical morphology actions

ActionDescription

Erosion

Outline erosion : if the structuring element placed in a point of the ROI has an intersection with the volume outside the ROI, these intersection points are added to the ROI.

Dilatation

Outline dilatation : if the structuring element placed in a point of the ROI has an intersection with the volume outside the ROI, this point is removed from the ROI.

Opening

Erosion then dilatation. This action enables to remove some little isolated regions, to smooth outline and to separate objects weakly linked.

Closure

Dilatation then erosion. This action enables to remove some little holes and to connect objects.

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