Analysis and Modelling of Faces and Gestures: Second by Takeo Kanade (auth.), Wenyi Zhao, Shaogang Gong, Xiaoou Tang PDF

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By Takeo Kanade (auth.), Wenyi Zhao, Shaogang Gong, Xiaoou Tang (eds.)

ISBN-10: 3540292292

ISBN-13: 9783540292296

During the final 30 years, face attractiveness and comparable difficulties comparable to face detection/tracking and facial features reputation have attracted researchers from either the engineering and psychology groups. moreover, huge study has been conducted to review hand and physique gestures. the certainty of the way people understand those vital cues has major clinical worth and broad purposes. for instance, human-computer interplay, visible surveillance, and shrewdpermanent video indexing are lively software components. Aiming in the direction of placing such impressive conception potential onto computers, researchers have made titanic growth. even though, technological demanding situations nonetheless exist in lots of facets. Following a layout just like the IEEE overseas Workshop on research and Modeling of Faces and Gestures (AMFG) 2003, this one-day workshop (AMFG 2005) supplied a centred foreign discussion board to collect famous researchers and examine teams to study the prestige of popularity, research and modeling of faces and gestures, to debate the demanding situations that we face, and to discover destiny instructions. total, 30 papers have been chosen from ninety submitted manuscripts. the subjects of those papers variety from characteristic illustration, strong attractiveness, studying, and 3D modeling to psychology. additionally, invited talks got, by way of Prof. Kanade and Dr. Phillips. The technical application was once prepared into 4 oral classes and poster classes. This workshop do not have been attainable with no the well timed studies supplied via the participants of the Technical application Committee less than a good agenda. October 2005 Wenyi Zhao Shaogang Gong Xiaoou Tang

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Additional info for Analysis and Modelling of Faces and Gestures: Second International Workshop, AMFG 2005, Beijing, China, October 16, 2005. Proceedings

Sample text

We can analyze facial expression image sequence by estimation of the parameters in this generative model. 3 Facial Expression Analysis and Synthesis Using Generative Models There are two main approaches in representing facial motions for facial expression analysis: model-based or appearance-based. Geometric features are extracted with the aid of 2D or 3D face models in model-based approaches. 3D deformable generic face model [5] or multistate facial component models [13] are used to extract facial features.

For example wrong estimation of the expression vector would lead to a totally wrong estimate of configuration parameter and therefore wrong estimate for person face parameter. To avoid this we use a deterministic annealing like procedure where in the beginning the expression weights and person face weights are forced to be close to uniform weights to avoid hard decisions about expression and face classes. The weights gradually become discriminative thereafter. To achieve this, we use a variable expression and person face class variances which are uniform to all classes and are defined as Σ e = Te σe2 I and Σ s = Ts σs2 I respectively.

In case of Fig. 5 (a), the t changed 0 → 1 and new expression parameter enew = (1−t)esmile +tesurprise . As a result, the t facial expression starts from neutral expression of smile and animates new expression as t changes and when t = 1, the expression become a peak expression of surprise. In case of (b), the t changed 1 → 0. In the same way, we can synthesize new faces during smile expressions as in (c) and (d). Fig. 5 (e) is the simultaneous control of the person face and expression parameters.

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Analysis and Modelling of Faces and Gestures: Second International Workshop, AMFG 2005, Beijing, China, October 16, 2005. Proceedings by Takeo Kanade (auth.), Wenyi Zhao, Shaogang Gong, Xiaoou Tang (eds.)


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