Computer Summary Vision Keypoint Detection Keypoint Recognition Search in the Search in the Database Database Database Database Pre-processing Make the actual classification easier Robust 3D Pose Robust 3D Pose Calculation Calculation Geometric verification (RANSAC) (RANSAC)
Computer Vision [Wagner et al. ISMAR’08]
Computer Vision [Wagner et al. ‘09]
Computer Vision Tracking by Detection Detection (object class)
Computer Traditional Tracking Vision t=1 t=2 position in prev. frame initialization candidate new positions (e.g., dynamics) best new position (e.g., max color similarity)
Computer Tracking-by-Detection Vision … detect object(s) independently in each frame associate detections over time into tracks
Computer Multiple Objects Vision Frame 1 Frame 5 Frame 9
Example: Multiple Object Computer Vision Tracking
Computer How to get the detections? Vision Persons Background Supervised Learning
Computer Using the classifier Vision
Computer How to link them? Vision • Space-Time Analysis: (a) collect detections Space Time Volume Detections [Leibe et al. CVPR’07]
Computer Trajectory Estimation Vision (a) collect detections (b) trajectory growing and selection t t z x Space Time Volume
Computer Trajectory Estimation Vision (a) collect detections (b) trajectory growing and selection t t H 2 H 1 z x Space Time Volume
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