Presented on the occasion of the 10th IEEE International Worlshop one Robot and Human Interactive Communication, in 2001, these images are commented in the proceedins.article
: "Image technology and facial Expression of Emotions".
The mutual influence of the high and low parts creates the chimerical illusion : for example the neutral eyes seems different with a smiling mouth.
Variations around a smile. the high part is modified by the smile, which nevertheless dominates the expression