Adrian Bowman: Statistics with a human face, 28 May 2021

EPFL Statistics seminars

31 May 2021, Maroussia Schaffner Portillo, 3 views

Three-dimensional surface imaging, through laser-scanning or stereo-photogrammetry, provides high-resolution data defining the surface shape of objects.  Human faces are of particular interest and there are many biological and anatomical applications, including assessing the success of facial surgery and investigating the possible developmental origins of some adult conditions.

An initial challenge is to structure the raw images by identifying features of the face.

Ridge and valley curves provide a very good intermediate level at which to approach this, as these provide a good compromise between informative representations of shape and simplicity of structure.

Some of the issues involved in analysing data of this type will be discussed and illustrated, including longitudinal shape change at short scale in facial animation, medium scale in human growth patterns, and very long scale in phylogenetic studies. 

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