See: Description
Class | Description |
---|---|
SoDilationBallProcessing3d |
SoDilationBallProcessing3d engine
The SoDilationBallProcessing3d engine performs a 3D dilation using a structuring element matching with a sphere |
SoDilationCubeProcessing |
SoDilationCubeProcessing engine
The SoDilationCubeProcessing engine performs a dilation using a structuring element matching with a cube. |
SoDilationDiskProcessing2d |
SoDilationDiskProcessing2d engine
The SoDilationDiskProcessing2d engine performs a 2D dilation using a structuring element matching with a disc. |
SoDilationDiskProcessing3d |
SoDilationDiskProcessing3d engine
The SoDilationDiskProcessing3d engine performs a 3D dilation using a structuring element matching with a disc |
SoDilationLineProcessing2d |
SoDilationLineProcessing2d engine
The SoDilationLineProcessing2d engine performs a 2D dilation using a structuring element matching with a line. |
SoDilationLineProcessing3d |
SoDilationLineProcessing3d engine
The SoDilationLineProcessing3d engine performs a 3D dilation using a structuring element matching with a line. |
SoDilationSquareColorProcessing2d |
SoDilationSquareColorProcessing2d engine
The SoDilationSquareColorProcessing2d engine performs a dilation on a true-color image. |
SoErosionBallProcessing3d |
SoErosionBallProcessing3d engine
The SoErosionBallProcessing3d engine performs a 3D erosion using a structuring element matching with a sphere |
SoErosionCubeProcessing |
SoErosionCubeProcessing engine
The SoErosionCubeProcessing engine performs an erosion using a structuring element matching with a cube. |
SoErosionDiskProcessing2d |
SoErosionDiskProcessing2d engine
The SoErosionDiskProcessing2d engine performs a 2D erosion using a structuring element matching with a disc |
SoErosionDiskProcessing3d |
SoErosionDiskProcessing3d engine
The SoErosionDiskProcessing3d engine performs a 3D erosion using a structuring element matching with a disc |
SoErosionLineProcessing2d |
SoErosionLineProcessing2d engine
The SoErosionLineProcessing2d engine performs a 2D erosion using a structuring element matching with a line |
SoErosionLineProcessing3d |
SoErosionLineProcessing3d engine
The SoErosionLineProcessing3d engine performs a 3D erosion using a structuring element matching with a line |
SoErosionSquareColorProcessing2d |
SoErosionSquareColorProcessing2d engine
The SoErosionSquareColorProcessing2d engine performs an erosion on a true-color image. |
In an erosion, pixel values within the structuring element are set to the minimum value of the element. In a binary image, an erosion removes isolated points and small particles, shrinks other particles, discards peaks at the object boundaries, and disconnects some particles.
Erosion modules are reiterative: repeating an erosion or dilation of size 1 N times has the same effect as performing a single erosion with a structuring element of size N.
In Figure 4 the binary image is I, and X denotes the set of points with a value of 1. The erosion of I by the structuring element B results in the set of points x, where the disk representing B and cenetred on x is totally included in the set of points X. The erosion of I can be denoted as or .
The eroded set of X by the structuring element B is:
It may also be written as:
The value of the structuring element (B) varies depending on the type of erosion. On a gray level image, the erosion by the structuring element B is the search for the minimal value of intensities within B.
When the point hits the edge of the image, the structuring element is composed of the intersection of B with the points of the structuring element totally within the image, and not the points outside the image.
In a dilation, pixel values within the disc are set to the maximum value of the pixel neighborhood. In a binary image, a dilation fills the small holes inside particles and gulfs at the object boundaries, enlarges the size of the particles and may connect neighboring particles.
Dilation modules are reiterative: repeating an erosion or dilation of size 1 N times has the same effect as performing a single erosion with a structuring element of size N.
In Figure 5, the binary image is I, and X denotes the set of points with a value of 1. The dilation of I by the structuring element B results in the set of points x, where the disc representing B and centered on x has a non empty intersection with the set of points X. The dilation of I can be denoted as or .
The dilated set of X by the structuring element B is:
It may also be expressed as:
The value of the structuring element (B) varies depending on the type of erosion. On a gray level image, the dilation by the structuring element B is the search for the maximum value of intensities within B:
When the point hits the edge of the image, the structuring element is composed of the intersection of B with the points of the structuring element totally within the image, and not the points outside the image.
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