- Slide 22: removed image from SIFT because confusing as we are still talking about scale selection (across scales, and not x,y).
- Slide 22: added sigma in the formula.
- Slide 78: added slide about FREAK descriptor for completeness. Not asked at the exam.
- Slide 79: updated recap comparison table with FREAK.
- updated zip file on additional reading material with FREAK paper