Performs an edge enhancement operation based on different Methods: Inner gradient, Outer gradient, Gradient (Morphological) and Top hat. Structuring Elements of 2D SQUARE, 3D CUBE and 3D CROSS are available at the sizes of 3, 5, 7, and 9 pixels.
It is a morphological contouring tool and the processing is based on voxel wise morphological operations: erosion and dilation and image subtraction. The Methods are summarized in the table below:
Inner gradient |
the difference between the input image and its erosion using the specified structuring element |
Outer gradient |
the difference between the dilation and the input image using the specified structuring element |
Gradient (morphological) |
the difference between the dilation and the erosion using the specified structuring element |
White Top hat |
the difference between the input image and its opening using the specified structuring element |
Black Top hat |
the difference between the closing and the input image using the specified structuring element |