Hand gestures are examples of fast and complex motions. Computers fail to track these in fast video, but sleight of hand fools humans as well: what happens too quickly we just cannot see. We show a 3D tracker for these types of motions that relies on the recognition of familiar configurations in 2D images (classification), and fills the gaps in-between (interpolation). We illustrate this idea with experiments on hand motions similar to finger spelling. The penalty for a recognition failure is often small: if two configurations are confused, they are often similar to each other, and the illusion works well enough, for instance, to drive a graphics animation of the moving hand. We contribute advances in both feature design and classifier training: our image features are invariant to image scale, translation, and rotation, and we propose a classification method that combines VQPCA with discrimination trees.


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    Title :

    3D tracking = classification + interpolation


    Contributors:
    Tomasi, (author) / Petrov, (author) / Sastry, (author)


    Publication date :

    2003-01-01


    Size :

    393880 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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