Questions

1. Why do usual shade correction algorithms darken pixels close to bright objects?

2. How can this darkening effect be prevented?

3. What is the difference between an algebraic and a morphological closing?

4. How can dark details in a gray scale image be extracted using mathematical morphology?

5. How can dark details with a maximal extension of X be extracted?

6. How does the use of markers in the watershed transformation work and what is their influence on the result?

7. How can the watershed transformation be used for the detection of thin dark lines in a gray scale image?

8. How can the watershed transformation be used for the detection of object contours?

9. Which morphological operator can be used for removing bright objects preserving the borders of all remaining objects?

10. In the analysis of fundus images, specificity cannot be used for an assessment of the quality of a pathology detection algorithm. Why?

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