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Pose-Invariant Facial Expression Recognition Using Variable-Intensity Templates
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DOI：10.1007/s11263-008-0185-x.png)
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In this paper, we propose a method for pose-invariant facial expression recognition from monocular video sequences. The advantage of our method is that, unlike existing methods, our method uses a simple model, called the variable-intensity template, for describing different facial expressions. This makes it possible to prepare a model for each person with very little time and effort. Variable-intensity templates describe how the intensities of multiple points, defined in the vicinity of facial parts, vary with different facial expressions. By using this model in the framework of a particle filter, our method is capable of estimating facial poses and expressions simultaneously. Experiments demonstrate the effectiveness of our method. A recognition rate of over 90% is achieved for all facial orientations, horizontal, vertical, and in-plane, in the range of +/- 40 degrees, +/- 20 degrees, and +/- 40 degrees from the frontal view, respectively.
Keyword:
Facial expression recognition
Variable-intensity templates
Intensity distribution models
Particle filter
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