Image segmentation based on object oriented mapping parameter estimation
Signal Processing
Video transcoder architectures for bit rate scaling of H.263 bit streams
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
Video transcoding for universal multimedia access
MULTIMEDIA '00 Proceedings of the 2000 ACM workshops on Multimedia
Motion-based segmentation and contour-based classification of video objects
MULTIMEDIA '01 Proceedings of the ninth ACM international conference on Multimedia
On clustering and retrieval of video shots
MULTIMEDIA '01 Proceedings of the ninth ACM international conference on Multimedia
Digital Video: An introduction to MPEG-2
Digital Video: An introduction to MPEG-2
Inertial Head-Tracker Sensor Fusion by a Complimentary Separate-Bias Kalman Filter
VRAIS '96 Proceedings of the 1996 Virtual Reality Annual International Symposium (VRAIS 96)
DANCE '02 Proceedings of the 2002 DARPA Active Networks Conference and Exposition
A Vision-Based Vehicle Identification System
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 4 - Volume 04
Predictive perceptual compression for real time video communication
Proceedings of the 12th annual ACM international conference on Multimedia
Causal saliency effects during natural vision
Proceedings of the 2006 symposium on Eye tracking research & applications
Object tracking using adaptive block matching
ICME '03 Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 3 (ICME '03) - Volume 03
Motion vector refinement for high-performance transcoding
IEEE Transactions on Multimedia
A hierarchical human detection system in (un)compressed domains
IEEE Transactions on Multimedia
A frequency-domain video transcoder for dynamic bit-rate reduction of MPEG-2 bit streams
IEEE Transactions on Circuits and Systems for Video Technology
Coding of details in very low bit-rate video systems
IEEE Transactions on Circuits and Systems for Video Technology
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Object-based bit allocation can result in significant improvement in the perceptual quality of extremely compressed video. However, real-time video object detection in large format high fidelity video is computationally daunting. Most algorithms begin with extensive use of classical bit analysis, and thus remain computationally heavy. Based on some recent results in human visual perception, in this paper, we present an experimental visual region tracking algorithm particularly designed for perceptual stream transcoding. This exploits the cue order observed in human visual perception to achieve very high computation speed as well as tracking efficiency. Rather than begin processing from pixel level or using any pixel level processing at all, it employs high level motion cue and block shape cue analysis to identify signatures of various relative movements between object of interest, scene background and the camera on the motion vector set, and from there it identifies objects. It then uses predictive filters to track the regions. The result is a fast yet highly effective perceptual region tracking algorithm that can operate in stream rate and track regions of perceptually significant object despite camera movements such as zoom, panning and translation. The technique is not specific to any special class of objects. We have implemented this algorithm in a live ISO-13818/MPEG-2 perceptual transcoder. In this paper, we share the performance of this implementation. This fast object-aware video rate transcoder is particularly suitable for live streaming and can convert a regular stream into a perceptually coded video stream.