Computer vision in human-computer interaction by Sebe N., Lew M.S., Huang T.S.

By Sebe N., Lew M.S., Huang T.S.

This ebook constitutes the refereed court cases of the foreign Workshop on Human-Computer interplay, HCI 2004, held at ECCV 2004 in Prague, Czech Republic in may possibly 2004.The 19 revised complete papers offered including an introductory assessment and an invited paper have been conscientiously reviewed and chosen from forty five submissions. The papers are prepared in topical sections on human-robot interplay, gesture popularity and physique monitoring, platforms, and face and head.

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With this model, starts as a small value, then climbs to a large value, and finally converges to a small value. 4 Prototype Updating Queue In order to reach the real-time requirement of developmental learning, we designed the prototype updating queue in Fig. 1, which stores the addresses of formerly visited states. Only states in the queue will be updated at each time step. Not only is the Q-value back-propagated, so is the primed sensation. This back-up is performed iteratively from the tail of the queue back to the head of the queue.

The probability to take each primed action is based on its Q-value. The primed sensation predicts what will be the actual sensation if the corresponding primed action is taken. The motivational system 20 Xiao Huang and Juyang Weng works as an action selection function denotes all the possible subsets of which chooses an action from a list of primed actions. Novelty is measured by the difference between primed sensation and actual sensation. A novelty-based motivational system is developed into more mature stage through interaction with humans (reward and punishment).

In a previous work [3] it has been shown, that using information about head orientation improves accuracy of gesture recognition significantly. While that evaluation has been conducted using a magnetic sensor, we are now using the visual measurements for head orientation. We calculate the following two features: and are defined as the absolute difference between the head’s azimuth/elevation angle and the hand’s azimuth/elevation angle. Fig. 4 shows a plot of all features values during the course of a typical pointing gesture.

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