1. 5th Intensive Course on Soil Micromorphology Naples 2001 12th - 14th September Image Analysis Lecture 8 Introduction to Binary Morphology

2. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology Erosion/Dilation Opening/Closing Kernel Shapes Applications in Particle / Void Size Distribution Introduction to Binary Morphology Methods Requires Segmentation of Image into Binary Form (may require manual editting). Foreground pixels are coded 1 - background 0 i.e. Particles 1 (white), voids 0 (black) or Voids 1 (white), particles 0 (black)

3. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology Erosion strips one layer of foreground pixels at edges of particles criteria based on number of surrounding background pixels can be any number 1 - 8 pixel of interest is red white - foreground black - background

4. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology a) foreground pixel removed for all criteria. h) foreground pixel removed only if criteria is set to 1 pixel. Criteria may also specify that diagonal erosion is (or is not permitted). Erosion not permitted if diagonals not allowed in (j)

5. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology Connectivity: 4 - point connectivity allows connection only up/down and side to side 8 - point connectivity allows connection on diagonals In 4 - point connectivity, foreground and background are uniquely separated. In 8 - point connectivity is background or foreground continuous across diagonal? Both are not possible

6. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology Erosion of original by one layer criterion - a single touching background pixel 4 - point connectivity8 - point connectivity

7. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology Erosion by 2 and 3 layers 4 - point connectivity Some residual parts of largest particle remain. Erosion by 2 and 3 layers 8 - point connectivity All foreground features will disappear.

8. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology

9. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology

10. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology

11. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 8: Binary Morphology

12. 5th Intensive Course on Soil Micromorphology - Naples 2001 Image Analysis - Lecture 5: Thresholding/Segmentation