Download Computer Vision Course Announcements and Topics - Prof. David Jacobs and more Study notes Computer Science in PDF only on Docsity! Announcements • Final: Thursday, December 15, 8am, here. • Review Session, Wednesday, Dec 14, 1pm, AV Williams 4424. • Review sheet with practice problems on-line. Hints for Final • Focus on core techniques/ideas: convolution, gradients, statistical modeling, 3D geometry, motion matrices and optimization methods we studied, and their use in vision. • Of course, other topics from course may show up. Modeling + Algorithms • Build a simple model of the world (eg., flat, uniform intensity). • Find provably good algorithms. • Experiment on real world. • Update model. Problem: Too often models are simplistic or intractable. Stereo • Modeling: Geometry, Photometry. – Perspective camera, known pose allows reconstruction. – Epipolar Constraint. – Ordering constraint – Match similar intensities. – Disparities similar in nearby pixels. • Algorithms – Straightforward Reconstruction. – Shortest path, Graph Algorithms. Where is Computer Vision Going? • More Data, Faster Machines => • More Interaction with Other Fields. • Fundamental Problems Remain State of the art method Boykov et al., Fast Approximate Energy Minimization via Graph Cuts, International Conference on Computer Vision, September 1999. Ground truth (Seitz) (Comaniciu and Meer) Learning • Recognition using supervised learning. – Given examples of an object – Use classifiers: eg, SVMs, Winnow, Boosting. • Grouping using unsupervised learning. – Eg., E-M • Probabilistic Modeling – Eg., Graphical models, texture, …. Graphics • Common interest in modeling reflection, light, 3D shape. • Image-Based Rendering. input depth image novel view Szeliski Figure 1: 3D tracking software developed at Digital Domain was used on nearly every shot of the movie Titanic. (From Vision in Film and Special Effects Doug Roble, Digital Domain) Biomedical Engineering • Segmentation – Identify organs to measure them. – Find tumors. • Tracking – Is a heart beating properly? Is there dead tissue? • Registration/Matching. – Positions of Tumors in Surgery. Figures by kind permission of Eric Grimson; further information can be obtained from his web site http://www.ai.mit.edu/people/welg/welg.html. Figures by kind permission of Eric Grimson; further information can be obtained from his web site http://www.ai.mit.edu/people/welg/welg.html. Figures by kind permission of Eric Grimson; further information can be obtained from his web site http://www.ai.mit.edu/people/welg/welg.html. Big Data Sets • Image Data Bases – Kodak, commercial data bases w/ tens of thousands of images. – Internet, with millions? • Satellite imagery (Petabytes). – Monitoring effects of climate change. • Custom Data Sets Tracking and Activity
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