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In this paper, we propose an interpolation based local postprocessing approach for finite element electronic structure calculations over locally refined hexahedral finite element meshes. It is shown that our approach is very efficient in finite element approximations of ground state energies. [ABSTRACT FROM AUTHOR]

This paper puts forward a novel method for automatically generating a pencil drawing from a real 2D color image in non-photo-realistic rendering. First, the edge of the color image is detected by Sobel operator. Next, the color image is sharpened by Unsharp Mask (USM), and then color scaling is used to get an image with radial and edge details. Furthermore, the original image is divided into many meaningful regions using an efficient method of image segmentation, then the texture direction is determined by Fourier transform and shape feature. To render better effects of illumination and local texture of pencil drawing, the line integral convolution (LIC) algorithm is applied and combined with color scaling and white noise image. Finally, the pencil drawing is created and the generation results from the superposition of the edge, the USM image, and the texture. Experimental results prove that our method could enhance the generated efficiency greatly by creating a more obvious edge, more natural tone, and more real texture than those offered by existed methods. [ABSTRACT FROM AUTHOR]

3D caricature generation is becoming a more interesting and challenging research topic. This paper presents personalized 3D caricature generation using PCA (Principal Component Analysis) for each 3D caricature component. First, we construct a 3D caricature dataset manually, and then we construct 3D caricature components datasets according to the defined attribute for each component. Next, PCA is employed to create each subspace for each 3D caricature component, and diverse vivid caricature component is generated by interactive mode. Finally, the generated caricature components are combined into 3D caricature based on the 3D true face. Our approach is very convenient and efficient to generate different kinds of 3D caricature by personalized thought, for example, a user just needs to drag the sliders for each principal component of the 3D caricature component. [ABSTRACT FROM AUTHOR]

This paper presents an online chatting system with automatic expression animation and animated avatar. The system is constructed upon an XML based language AAML (Affective Animation Markup Language), which describes hierarchically affective content for online communication. Once the user types a chatting sentence, the AAML produces a piece of personalized facial animation. The animation would be sent to the remote client right now to enrich the chatting process. Comparatively, our system is designed with its dedicated feature that its structure is hierarchical and open, so the users can extend the AAML, defining their own tags to realize personal affective expression. In addition, caricature generation according to an input facial photograph is embedded in the framework, so the animation is synthesized based on the caricature with entertainment effect. Successful application of the online chatting system shows that our system can enhance affective interaction by the customized facial animation and the animated avatar that is similar with the user. The function can also be widely applied in online or mobile environment such as multimedia message synthesis. [ABSTRACT FROM AUTHOR]