Expressive Rendering: A Review of Nonphotorealistic Techniques
IEEE Computer Graphics and Applications
Visual interest and NPR: an evaluation and manifesto
Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering
Image and video based painterly animation
Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering
Digital Lighting and Rendering (2nd Edition)
Digital Lighting and Rendering (2nd Edition)
Empathic painting: interactive stylization through observed emotional state
Proceedings of the 4th international symposium on Non-photorealistic animation and rendering
Facial actions as visual cues for personality: Research Articles
Computer Animation and Virtual Worlds - CASA 2006
Expression of Emotions in Virtual Humans Using Lights, Shadows, Composition and Filters
ACII '07 Proceedings of the 2nd international conference on Affective Computing and Intelligent Interaction
Skin-Aware Stylization of Video Portraits
CVMP '09 Proceedings of the 2009 Conference for Visual Media Production
Exploring the effect of color palette in painterly rendered character sequences
CAe '12 Proceedings of the Eighth Annual Symposium on Computational Aesthetics in Graphics, Visualization, and Imaging
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We propose a technique to enhance emotional expressiveness in games and animations. Artists have used colors and painting techniques to convey emotions in their paintings for many years. Moreover, researchers have found that colors and line properties affect users' emotions. We propose using painterly rendering for character sequences in games and animations with a knowledge-based approach. This technique is especially useful for parametric facial sequences. We introduce two parametric authoring tools for animation and painterly rendering and a method to integrate them into a knowledge-based painterly rendering system. Furthermore, we present the results of a preliminary study on using this technique for facial expressions in still images. The results of the study show the effect of different color palettes on the intensity perceived for an emotion by users. The proposed technique can provide the animator with a depiction tool to enhance the emotional content of a character sequence in games and animations.