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Video annotation wiki for South African sign languageAdam, Jameel. January 2011 (has links)
<p>The SASL project at the University of the Western Cape aims at developing a fully automated translation system between English and South African Sign Language (SASL). Three important aspects of this system require SASL documentation and knowledge. These are: recognition of SASL from a video sequence, linguistic translation between SASL and English and the rendering of SASL. Unfortunately, SASL documentation is a scarce resource and no official or complete documentation exists. This research focuses on creating an online collaborative video annotation knowledge management system for SASL where various members of the community can upload SASL videos to and annotate them in any of the sign language notation systems, SignWriting, HamNoSys and/or Stokoe. As such, knowledge about SASL structure is pooled into a central and freely accessible knowledge base that can be used as required. The usability and performance of the system were evaluated. The usability of the system was graded by users on a rating scale from one to five for a specific set of tasks. The system was found to have an overall usability of 3.1, slightly better than average. The performance evaluation included load and stress tests which measured the system response time for a number of users for a specific set of tasks. It was found that the system is stable and can scale up to cater for an increasing user base by improving the underlying hardware.</p>
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The development of a behavioural video analysis system and a toolbox prototype.Naidoo, Throshni. January 1996 (has links)
Behavioural research studies often include a data acquisition process, during which
subjects are observed, and the displayed behaviours recorded, and a subsequent analysis
process, during which the observed behaviours are analysed. In addition the data
acquisition process could occur in real-time, or at a later stage, by referring to a recording
of the original session.
This dissertation addresses the latter approach through the use of computer based digital
video technology. A windows based video analysis system, called VAS, that was
developed to assist with the acquisition of observed behaviours from the video, and the
analysis thereof is discussed. This is followed by a discussion of the implementation of
VAS. Finally the directions for further research are identified, and discussed. / Thesis (M.Sc.)-University of Natal, Pietermaritzburg, 1996.
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Error-resilient video streaming over lossy channelsKim, Joohee 08 1900 (has links)
No description available.
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Spatio-temporal segmentation in the compressed domainJamrozik, Michele Lynn 12 1900 (has links)
No description available.
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Very low bit rate video coding using adaptive nonuniform sampling and matching pursuitIndra, Isara 12 1900 (has links)
No description available.
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Digital Video Watermarking Robust to Geometric Attacks and CompressionsLiu, Yan 03 October 2011 (has links)
This thesis focuses on video watermarking robust against geometric attacks and
video compressions. In addition to the requirements for an image watermarking algorithm,
a digital video watermarking algorithm has to be robust against advanced
video compressions, frame loss, frame swapping, aspect ratio change, frame rate change,
intra- and inter-frame filtering, etc. Video compression, especially, the most efficient
compression standard, H.264, and geometric attacks, such as rotation and cropping,
frame aspect ratio change, and translation, are considered the most challenging attacks
for video watermarking algorithms.
In this thesis, we first review typical watermarking algorithms robust against geometric
attacks and video compressions, and point out their advantages and disadvantages.
Then, we propose our robust video watermarking algorithms against Rotation,
Scaling and Translation (RST) attacks and MPEG-2 compression based on the logpolar
mapping and the phase-only filtering method. Rotation or scaling transformation
in the spatial domain results in vertical or horizontal shift in the log-polar mapping
(LPM) of the magnitude of the Fourier spectrum of the target frame. Translation has
no effect in this domain. This method is very robust to RST attacks and MPEG-2
compression. We also demonstrate that this method can be used as a RST parameters
detector to work with other watermarking algorithms to improve their robustness to
RST attacks.
Furthermore, we propose a new video watermarking algorithm based on the 1D
DFT (one-dimensional Discrete Fourier Transform) and 1D projection. This algorithm
enhances the robustness to video compression and is able to resist the most advanced video compression, H.264. The 1D DFT for a video sequence along the temporal domain
generates an ideal domain, in which the spatial information is still kept and the
temporal information is obtained. With detailed analysis and calculation, we choose
the frames with highest temporal frequencies to embed the fence-shaped watermark
pattern in the Radon transform domain of the selected frames. The performance of the
proposed algorithm is evaluated by video compression standards MPEG-2 and H.264;
geometric attacks such as rotation, translation, and aspect-ratio changes; and other
video processing. The most important advantages of this video watermarking algorithm
are its simplicity, practicality and robustness.
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Collaborative annotation, analysis, and presentation interfaces for digital videoDiakopoulos, Nicholas A. 06 July 2009 (has links)
Information quality corresponds to the degree of excellence in communicating knowledge or intelligence and encompasses aspects of validity, accuracy, reliability, bias, transparency, and comprehensiveness among others. Professional news, public relations, and user generated content alike all have their own subtly different information quality concerns. With so much recent growth in online video, it is also apparent that more and more consumers will be getting their information from online videos and that understanding the information quality of video becomes paramount for a consumer wanting to make decisions based on it.
This dissertation explores the design and evaluation of collaborative video annotation and presentation interfaces as motivated by the desire for better information quality in online video. We designed, built, and evaluated three systems: (1) Audio Puzzler, a puzzle game which as a by-product of play produces highly accurate time-stamped transcripts of video, (2) Videolyzer, a video annotation system designed to aid bloggers and journalists collect, aggregate, and share analyses of information quality of video, and (3) Videolyzer CE, a simplified video annotation presentation which syndicates the knowledge collected using Videolyzer to a wider range of users in order to modulate their perceptions of video information. We contribute to knowledge of different interface methods for collaborative video annotation and to mechanisms for enhancing accuracy of objective metadata such as transcripts as well as subjective notions of information quality of the video itself.
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Evaluation of the color image and video processing chain and visual quality management for consumer systems /Sarkar, Abhijit. January 2008 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 2008. / Typescript. Includes bibliographical references (leaves 188-201).
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Reconfigurable hardware for color space conversion /Patil, Sreenivas. January 2008 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 2008. / Typescript. Includes bibliographical references (leaves 29-32).
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Analysis of H.264-based Vclan implementation /Zheng, Hao, January 2004 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 90-92). Also available on the Internet.
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