Jonathan Tanner

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A feature-based approach to tracking rigid and non-rigid facial motion is described. Feature points are characterised using Gabor wavelets and can be individually tracked by phase-based displacement estimation. In order to achieve robust tracking a exible shape model is used to impose global constraints upon the local feature points and to constrain the(More)
Today's powerful computers and networks present the opportunity for video across the Internet right to the desktop. However, Internet video often suffers from packet loss and jitter, degrading the user's perceived quality of the video. Understanding the effects of delay, loss and jitter on media quality is critical for choosing delay buffer sizes and packet(More)
Today's powerful computers and networks present the opportunity for video across the Internet right to the desktop. However, Internet video often suuers from packet loss and jitter, degrading the user's perceived quality of the video. The eeects of packet loss on perceptual quality are well-understood, but to date there have not been careful user studies(More)
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