Thinning Operator
Building the Cantata Workspace
To build a workspace to experiment with the thinning operator:
- Select and Display the image $MMACH/viff/thinthick.xv
using the operators User Defined, Expand and
Display Image. Expand is used to make the pixels
look larger as the original image is very small.
- Build the two Structuring Elements A and B using two
3x3 Str.El.
operators.
- Use operators
Sup-Gen.
and
Subtraction (mmach)
Exercises
- Repeat the same experiment but thinning pixels with have the left and
right pixels equal to one.
- Repeat the same experiment by thinning pixels shich are end points
of one pixel thin objects. In this experiment use the image supgen.xv.
(Hint: use the operator
Rotate Str. El.)
- Are the thinning operators used in this experiment and in the above
exercice homotopic?
- Repeat the same experiment to thin the pixels that are in the corner,
but using a homotopic thinning operator using a 4-connectedness topology.
(Hint: use the operator
Rotate Str. El.)