1. CV in a Nutshell (I) Yi Li http://users.cecs.anu.edu.au/~yili/CV inNutshell.htm

2. Outline Introduction Image Formation Early vision Cognition in psychology Face recognition (I)

3. Paper discussion (1) Recognition by Components: – Segmentation: blocks, cylinders, wedges, cones – Curvature, collinearity, symmetry, parallel – Contour, surface, texture – Occlusion – Top-down or bottom-up? – Relation: pairwise? http://euron.upc.es/dbtm/show_image.php?id=36

4. Paper discussion (2) Face Recognition – extremely low-resolution images (Yang and Ma) – Occlusion (sparse) – Component vs hollistic – Context! – Facial expression (Cohn) – Illumination (Basri and Jacobs) – Specialized (Martinez)

5. Image Formation Geometry – image plane – projection Physics of light – Brightness / Illumination – Light source – Lambertian scattered such that the apparent brightness of the surface to an observer is the same regardless of the observer's angle of view (wiki) nikonweb.com

6. Lighting http://www.cs.umd.edu/~djacobs/CMSC828/Lighting.pdf

8. Early Vision Early year of computer vision – David Marr (Psychologist, MIT) – Azriel Rosenfeld (Mathematician, Maryland) – Takeo Kanade (Engineer, CMU) Visual path – How early? – Recognition? – Saliency / gist scienceblogs.com http://i.neoseeker.com/mgv/436139-Triforce%20of%20Wisdom/139/15/lizard_display.jpg

9. Illusion Aperture problem http://www.cfar.umd.edu/~fer/optical/move ment2.html http://www.cfar.umd.edu/~fer/optical/move ment2.html http://www.michaelbach.de/ot/

10. Skeletonization http://www.inf.u-szeged.hu/~palagyi/skel/skel.html

11. Template Matching Find transformation to align two images cost function Example: Chamfer Matching Example 2: Hough transform Example 3: Probabilistic voting http://www.gavrila.net/Research/Chamfer_System/chamfer_system.html

12. Deformable Shape matching – Shape Context Snake – Active Contour, Active Appearance Articulated objects – Scissor – Human body

13. Face Recognition Linear subspaces – PCA and LDA – Eigenfaces vs Fisherfaces http://www.cs.umd.edu/~djacobs/CMSC828/LinearSubspacesGeometry.pdf

14. Q/A Introduction Image Formation Early vision Cognition in psychology Face recognition (I)