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Sökning: swepub > Umeå universitet > Söderström Ulrik 1978 > (2004)

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1.
  • Söderström, Ulrik, 1978-, et al. (författare)
  • Customizing Lip Video into Animation for Wireless Emotional Communication
  • 2004
  • Rapport (övrigt vetenskapligt)abstract
    • Universal Multimedia Access (UMA) engines are used to adapt the media content to suite different environments.The adaptation decision for content used over wireless networks is heavily dependent on the bandwidth needs since the transmission cost over wireless networks is high. We customize lip video into lip animations and through tests we challenge the assumption that the quality is reduced when the transmission cost is reduced. We show that animations are comparable with video when considering human emotion understanding and comparable with audio only when considering transmission cost. We argue that it is important to consider human cognitive and perceptive factors in the decision stage of a UMA engine. This can both improve the user’s perceived quality and lower the transmission cost.
2.
  • Söderström, Ulrik, 1978-, et al. (författare)
  • Emotion recognition and estimation from tracked lip features
  • 2004
  • Rapport (övrigt vetenskapligt)abstract
    • Humans transmit and display information through the visual image of our lips; information about our speech and our emotions and expressions. By being able to track the movement of the lips, computers can make use of the visual part of the information. This information can be used for multiple purposes. Other research has mainly been focused on using lip tracking for speechreading, but here we focus on how to make use of tracked lip features for emotions. We have found that people are better at interpreting basic emotions displayed through an animation of lips than interpreting the same emotions displayed through a real video sequence that shows the lower part of the face. We have successfully transferred three basic emotions from visual information into information from another modality; touch.
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