Matrix analysis
Robust computation of optical flow in a multi-scale differential framework
International Journal of Computer Vision
Spline-Based Image Registration
International Journal of Computer Vision
Efficient Region Tracking With Parametric Models of Geometry and Illumination
IEEE Transactions on Pattern Analysis and Machine Intelligence
Tracking Human Motion in Structured Environments Using a Distributed-Camera System
IEEE Transactions on Pattern Analysis and Machine Intelligence
Robustly estimating changes in image appearance
Computer Vision and Image Understanding - Special issue on robusst statistical techniques in image understanding
Fast Approximate Energy Minimization via Graph Cuts
IEEE Transactions on Pattern Analysis and Machine Intelligence
Finding Deformable Shapes Using Loopy Belief Propagation
ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part III
Real-Time 2-D Feature Detection on a Reconfigurable Computer
CVPR '98 Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
Stereo Matching Using Belief Propagation
IEEE Transactions on Pattern Analysis and Machine Intelligence
Tracking Across Multiple Cameras With Disjoint Views
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Cyclops: in situ image sensing and interpretation in wireless sensor networks
Proceedings of the 3rd international conference on Embedded networked sensor systems
Image alignment and stitching: a tutorial
Foundations and Trends® in Computer Graphics and Vision
An iterative image registration technique with an application to stereo vision
IJCAI'81 Proceedings of the 7th international joint conference on Artificial intelligence - Volume 2
Fast object tracking using adaptive block matching
IEEE Transactions on Multimedia
Policy optimization for dynamic power management
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
A new diamond search algorithm for fast block-matching motion estimation
IEEE Transactions on Image Processing
Adaptive rood pattern search for fast block-matching motion estimation
IEEE Transactions on Image Processing
Image change detection algorithms: a systematic survey
IEEE Transactions on Image Processing
Image and Vision Computing
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Wireless, battery-powered camera networks are becoming of increasing interest for surveillance and monitoring applications. The computational power of these platforms is often limited in order to reduce energy consumption. In addition, many embedded processors do not have floating point support in hardware. Among the visual tasks that a visual sensor node may be required to perform, motion analysis is one of the most basic and relevant. Events of interest are usually characterized by the presence of moving objects or persons. Knowledge of the direction of motion and velocity of a moving body may be used to take actions such as sending an alarm or triggering other camera nodes in the network. We present a fast algorithm for identifying moving areas in an image. The algorithm is efficient and amenable to implementation in fixed point arithmetic. Once the moving blobs in an image have been precisely localized, the average velocity vector can be computed using a small number of floating point operations. Our procedure starts by determining an initial labeling of image blocks based on local differential analysis. Then, belief propagation is used to impose spatial coherence and to resolve aperture effect inherent in texture less areas. A detailed analysis of the computational cost of the algorithm and of the provisions that must be taken in order to avoid overflow with 32-bit words is included.