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  1. Proceedings of the 2010 ACM workshop on Surreal media and virtual cloning (SMVC '10)
  2. Towards a spatio-temporal appearance model for human skin
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Next generation 3d video representation, processing and coding
A real-time performance system for virtual theater
Towards a spatio-temporal appearance model for human skin
Towards an expressive virtual tutor: an implementation of a virtual tutor based on an empirical study of non-verbal behaviour
Using virtual worlds for behaviour clustering-based analysis
Automatic 3d virtual cloning of a speaking human face
Virtual gazing in video surveillance
A virtual coaching environment for improving golf swing technique
Presentation of geo-referenced videos with google earth
GrabcutD: improved grabcut using depth information
A new approach to photography forensics using 3d analysis for correcting perception errors: a case study
3D reconstruction of indoor and outdoor building scenes from a single image
Building virtual worlds by 3d object mapping

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Towards a spatio-temporal appearance model for human skin

Content Provider ACM Digital Library
Author Weyrich, Tim
Abstract In this talk, I will present latest results in modelling the unique reflectance properties of human skin and techniques to acquire appearance parameters for such reflectance models. The main focus will be on recent developments that focus on spatial and temporal variations in skin appearance. At the core lies a novel multi-layered, heterogeneous spectral reflectance model for human skin. The model captures the inter-scattering of light among layers, each of which may have an independent set of spatially-varying absorption and scattering parameters. For greater physical accuracy and control, we introduce an infinitesimally thin absorbing layer between scattering layers. To obtain parameters for our model, we use a novel acquisition method that begins with multi-spectral photographs. By using an inverse rendering technique, along with known chromophore spectra, we optimise for the best set of parameters for each pixel of a patch. Our model can be applied to faithfully reproduce complex skin appearance due to variations in skin pigmentation. This is in contrast to most previous work, which assumes that skin is homogeneous or composed of homogeneous layers. I will demonstrate the accuracy and flexibility of our model by creating complex skin visual effects such as veins, tattoos, rashes, and freckles, which would be difficult to author using only colour textures at the skin's outer surface. By varying the parameters of our model, we can simulate effects from external forces, such as visible changes in blood flow within the skin due to external pressure. To analyse the importance of such changes in blood perfusion for the appearance of human faces, we analysed spatio-temporal variations of blood concentrations across different facial expressions. From these measurements we derive parameters for a novel dynamic appearance model that provides realistic, intuitive, and automatic control for skin colour, a skin appearance rig. Our method is easily be coupled with a traditional (geometric) facial animation rig. This can be used, for example, to augment digital facial performance with realistic appearance changes. I will demonstrate an efficient implementation of our method, and show that it adds negligible overhead to existing animation and rendering pipelines.
Starting Page 37
Ending Page 38
Page Count 2
File Format PDF
ISBN 9781450301756
DOI 10.1145/1878083.1878094
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2010-10-29
Publisher Place New York
Access Restriction Subscribed
Subject Keyword 3d representation Processing and coding
Content Type Text
Resource Type Article
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