Three-camera setup to record simultaneously standardized high-definition video for smile analysis.

Introduction: Our objective was to develop a photographic setup that would simultaneously capture subjects' smiles from 3 views, both statically and dynamically, and develop a software to crop the produced video clip and slice the frames to study the smile at different stages.

Methods: Facial images were made of 96 subjects, aged 18 to 28 years, in natural head position using a standardized setup of 3 digital single lens reflex cameras, with a reference sticker (10 × 10 mm) on the forehead of each subject. To test the reproducibility of the setup, 1 operator took 3 images of all subjects on the same day and on 3 different days in a subset of 26 subjects.