Tracking and data association
Partitioned Sampling, Articulated Objects, and Interface-Quality Hand Tracking
ECCV '00 Proceedings of the 6th European Conference on Computer Vision-Part II
Wormholes in Shape Space: Tracking through Discontinuous Changes in Shape
ICCV '98 Proceedings of the Sixth International Conference on Computer Vision
On-Line Selection of Discriminative Tracking Features
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Fast Pose Estimation with Parameter-Sensitive Hashing
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Kernel-Based Bayesian Filtering for Object Tracking
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Strike a Pose: Tracking People by Finding Stylized Poses
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Contour-Based Learning for Object Detection
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1 - Volume 01
Detecting Objects of Variable Shape Structure With Hidden State Shape Models
IEEE Transactions on Pattern Analysis and Machine Intelligence
Detecting instances of shape classes that exhibit variable structure
ECCV'06 Proceedings of the 9th European conference on Computer Vision - Volume Part I
A boundary-fragment-model for object detection
ECCV'06 Proceedings of the 9th European conference on Computer Vision - Volume Part II
Features extraction from hand images based on new detection operators
Pattern Recognition
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Hidden State Shape Models (HSSMs) were previously proposed to represent and detect objects in images that exhibit not just deformation of their shape but also variation in their structure. In this paper, we introduce Dynamic Hidden-State Shape Models (DHSSMs) to track and recognize the non-rigid motion of such objects, for example, human hands. Our recursive Bayesian filtering method, called DP-Tracking, combines an exhaustive local search for a match between image features and model states with a dynamic programming approach to find a global registration between the model and the object in the image. Our contribution is a technique to exploit the hierarchical structure of the dynamic programming approach that on average considerably speeds up the search for matches. We also propose to embed an online learning approach into the tracking mechanism that updates the DHSSM dynamically. The learning approach ensures that the DHSSM accurately represents the tracked object and distinguishes any clutter potentially present in the image. Our experiments show that our method can recognize the digits of a hand while the fingers are being moved and curled to various degrees. The method is robust to various illumination conditions, the presence of clutter, occlusions, and some types of self-occlusions. The experiments demonstrate a significant improvement in both efficiency and accuracy of recognition compared to the non-recursive way of frame-by-frame detection.