Research

Easy Generation of Facial Animation Using Motion Graphs


Reference:

Figueiredo Serra, J., Cetinaslan, O., Ravikumar, S., Orvalho, V. and Cosker, D., 2017. Easy Generation of Facial Animation Using Motion Graphs. Computer Graphics Forum

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    Official URL:

    https://doi.org/10.1111/cgf.13218

    Abstract

    Facial animation is a time-consuming and cumbersome task that requires years of experience and/or a complex and expensive set-up. This becomes an issue, especially when animating the multitude of secondary characters required, e.g. in films or video-games. We address this problem with a novel technique that relies on motion graphs to represent a landmarked database. Separate graphs are created for different facial regions, allowing a reduced memory footprint compared to the original data. The common poses are identified using a Euclidean-based similarity metric and merged into the same node. This process traditionally requires a manually chosen threshold, however, we simplify it by optimizing for the desired graph compression. Motion synthesis occurs by traversing the graph using Dijkstra's algorithm, and coherent noise is introduced by swapping some path nodes with their neighbours. Expression labels, extracted from the database, provide the control mechanism for animation. We present a way of creating facial animation with reduced input that automatically controls timing and pose detail. Our technique easily fits within video-game and crowd animation contexts, allowing the characters to be more expressive with less effort. Furthermore, it provides a starting point for content creators aiming to bring more life into their characters.

    Details

    Item Type Articles
    CreatorsFigueiredo Serra, J., Cetinaslan, O., Ravikumar, S., Orvalho, V. and Cosker, D.
    DOI10.1111/cgf.13218
    DepartmentsFaculty of Science > Computer Science
    Research CentresEPSRC Centre for Doctoral Training in Statistical Mathematics (SAMBa)
    Publisher Statementcgf_easy_generation.pdf: This is the peer reviewed version of the following article: Figueiredo Serra, J., Cetinaslan, O., Ravikumar, S., Orvalho, V., & Cosker, D. (2017). Easy Generation of Facial Animation Using Motion Graphs. Computer Graphics Forum, which has been published in final form at https://doi.org/DOI: 10.1111/cgf.13218. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    RefereedYes
    StatusPublished
    ID Code56094

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