Erosion

1
Erosion
2
Example for Erosion
Input image
Structuring Element
Output Image
Treat the pixel falls out of boundary under the
mask has the value of 0 (NOTE this is just one
way of handling it, other options including copy
the boundary pixel values or reflect with
respect to the boundary pixel).
3
Example for Erosion
Input image
Structuring Element
Output Image
4
Example for Erosion
Input image
Structuring Element
Output Image
5
Example for Erosion
Input image
Structuring Element
Output Image
6
Example for Erosion
Input image
Structuring Element
Output Image
7
Example for Erosion
Input image
Structuring Element
Output Image
8
Example for Erosion
Input image
Structuring Element
Output Image
9
Example for Erosion
Input image
Structuring Element
Output Image
10
Example for Erosion
Input image
Structuring Element
Output Image
11
Example for Erosion
Input image
Structuring Element
Output Image
12
Dilation
13
Example for Dilation
Input image
Structuring Element
Output Image
14
Example for Dilation
Input image
Structuring Element
Output Image
15
Example for Dilation
Input image
Structuring Element
Output Image
16
Example for Dilation
Input image
Structuring Element
Output Image
17
Example for Dilation
Input image
Structuring Element
Output Image
18
Example for Dilation
Input image
Structuring Element
Output Image
19
Example for Dilation
Input image
Structuring Element
Output Image
20
Example for Dilation
Input image
Structuring Element
Output Image
21
Example for Dilation
Input image
Structuring Element
Output Image
22
Example for Dilation
Input image
Structuring Element
Output Image
23
Morphology Operations

• Dilation
• Result is mask OR original
• Erosion
• Result pixel is 1 if origin pixel is 1 and all
  pixels covered by the mask are also 1

24
Morphology Operations

• Closing dilation followed by erosion
• Opening erosion followed by dilation