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Motion estimation provides an attractive alternative to cumbersome interface devices for human-computer interaction (HCI). Worthy of note is that the visual recognition of hand gestures can help to achieve an easy and natural interaction between human and computer. The interfaces of HCI and other virtual reality systems depend on accurate, real-time hand and fingertip tracking for an association between real objects and the corresponding digital information. However, they are expensive, and complicated operations can make them troublesome. We are developing a real-time, view-based gesture recognition system. The optical flow is estimated and segmented into motion fragments. Using an artificial neural network (ANN), the system can compute and estimate the motions of gestures. Compared with traditional approaches, theoretical and experimental results show that this method has simpler hardware and algorithms, but is more effective. It can be used in moving object recognition systems for understanding human body languages.
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