1. Introduction to ECE432 Instructor: Ying Wu Dept. Electrical & Computer Engr. Northwestern University Evanston, IL 60208 http://www.ece.northwestern.edu/~yingwu yingwu@ece.northwestern.edu ECE 432 Advanced Computer Vision

2. A Dream Can the computer see? –Can it tell what a car is? –Can it recognize my face? –Can it perceive my gait? –Can it guess where I am looking? –Can it know what I am doing? –Can it summarize a movie for me? –…

3. Finger Grabber

4. Finger Pen

5. Finger Painter

6. A Big Picture of the Field Vision-based interfaces Multimedia databases Intell. video surveillance Robotics Image processing Computer vision Computer graphics Statistical learning Math Physics

7. Motivation and Applications Intelligent video surveillance Intelligent human-computer interaction Smart environments Multimedia understanding Intelligent robots Medical imaging Vision-based graphics

8. Perceptual PowerPoint (P 3 ) face/hand detection multiple object tracking motion interpretation click to show the video

9. Mobile Device and Intelligent Environment VisualPanel : getting rid of mice and keyboards by using a piece of paper and fingers

10. VfG: video texture This video was generated from a 20-frame short sequence

11. What is Computer Vision? Infer the world through images/video –Motion? –3D structure/shape? –Lighting? –Texture? –Semantics? –… An inverse problem image the world

12. Broad Research Image processing –Filtering, enhancement, compression, … Low-level vision –Edge/corner detection –Image matching, optical flow –Segmentation, … Middle-level vision –3D recovery –Motion recovery –Lighting recovery, … High-level vision –Object detection/recognition –Image/video understanding, …

13. Image processing

14. Low-level vision

16. Middle-level vision

18. Head tracking demo (live)

19. High-level vision

20. Paper- Rock- Scissors : playing interactive video games against computers.

21. Possible Course Projects Face detection Face recognition Head tracking Background maintenance Dominant motion detection Video event detection Video texture Image mosaic Viewing morphing Image impainting