ICS: Tutorial 1 (Week 2)
Discuss the following questions:
Marr's distinction between ``Type 1'' and ``Type 2'' theories
What is Marr's distinction between ``Type 1'' and ``Type 2'' theories?
Which of the following are likely to have which type of theory?
- The Fourier Transform
- Protein-folding
- Weather-forecasting
- Stereo vision
- Natural language understanding
Marr and Poggio 1976
- What does the possibility of stereo fusion of random dot stereograms
tell us about the process of stereo vision?
- What two constraints on real-world images does Marr and Poggio's
theory of stereo vision exploit, and what properties of visual scenes
do they depend on?
- How does the theory implement Uniqueness?
- How does the theory implement Continuity?
- What kind of algorithm does the theory involve?
- What does the algorithm do?
- What does the algorithm do when faced with semitransparent
objects, such as a reflecting window to a moderately illuminated room?
Does it represent the window surface, the room surfaces, or both?
Mark Steedman
steedman@inf.ed.ac.uk
September 2009
