This is what Elsys, the Russian company behind VibraImage, promises:
VibraImage technology registers micromovement (vibration) of person by standard digital, web or television cameras and image processing. Human head microvibration is linked with the vestibular-emotional reflex (VER) and depends on emotions level. VibraImage system detects human emotions by control of 3D head-neck movements accumulated in several frames of video processing. Vibraimage - system that can do anything in human detection!