Dilation, Erosion, Opening, Closing
Building the Cantata Workspace
There are two basic tools in Mathematical Morphology:
Dilation and
Erosion. They can process both binary and grey-level images.
These operators require a structuring element as second input.
- Using the operator
Struct. El. 3x3 it is possible
to generate 3x3 planar elements.
- Using the operator
Disk Struct. El. it is possible
to generate any disk, using three distance metrics: Euclidean, City-Block
and Chess-Board.
- Using the operator
Viff-> Str.El. to convert
any viff file to a structuring element.
Select the $DIP/data/angio.tiff image. It is a grey-level image.
Threshold the image at 128-level using the
>
operator to produce a binary image.
The
Dilation and
Erosion operators can be applied to both binary and grey-level images.
Use a circular structuring element of diameter 5 to perform an Opening
and a Closing operation on the image.
Opening is an erosion followed by a dilation operation.
Closing is a dilation followed by an erosion operation.
Exercises
-
How can you generate the first four illustrative images shown on the
experiment page.
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