Facial plast Surg 2015; 31(05): 431-438
DOI: 10.1055/s-0035-1564720
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Fast and Accurate Digital Morphometry of Facial Expressions

Carl Martin Grewe1, Lisa Schreiber2, Stefan Zachow1
  • 1Therapy Planning Group, Mathematics for Life and Material Sciences Zuse Institute Berlin, Berlin, Germany
  • 2Visual Knowledge, Center for Literary and Cultural Research, Berlin, Germany
Further Information

Publication History

Publication Date:
18 November 2015 (online)

Abstract

Facial surgery deals with a part of the human body that is of particular importance in everyday social interactions. The perception of a person's natural, emotional, and social appearance is significantly influenced by one's expression. This is why facial dynamics has been increasingly studied by both artists and scholars since the mid-Renaissance. Currently, facial dynamics and their importance in the perception of a patient's identity play a fundamental role in planning facial surgery. Assistance is needed for patient information and communication, and documentation and evaluation of the treatment as well as during the surgical procedure. Here, the quantitative assessment of morphological features has been facilitated by the emergence of diverse digital imaging modalities in the last decades. Unfortunately, the manual data preparation usually needed for further quantitative analysis of the digitized head models (surface registration, landmark annotation) is time-consuming, and thus inhibits its use for treatment planning and communication. In this article, we refer to historical studies on facial dynamics, briefly present related work from the field of facial surgery, and draw implications for further developments in this context. A prototypical stereophotogrammetric system for high-quality assessment of patient-specific 3D dynamic morphology is described. An individual statistical model of several facial expressions is computed, and possibilities to address a broad range of clinical questions in facial surgery are demonstrated.