This book discusses human emotion recognition from face images using
different modalities, highlighting key topics in facial expression
recognition, such as the grid formation, distance signature, shape
signature, texture signature, feature selection, classifier design, and
the combination of signatures to improve emotion recognition.
The book explains how six basic human emotions can be recognized in
various face images of the same person, as well as those available from
benchmark face image databases like CK+, JAFFE, MMI, and MUG. The
authors present the concept of signatures for different characteristics
such as distance and shape texture, and describe the use of associated
stability indices as features, supplementing the feature set with
statistical parameters such as range, skewedness, kurtosis, and entropy.
In addition, they demonstrate that experiments with such feature choices
offer impressive results, and that performance can be further improved
by combining the signatures rather than using them individually.
There is an increasing demand for emotion recognition in diverse fields,
including psychotherapy, biomedicine, and security in government, public
and private agencies. This book offers a valuable resource for
researchers working in these areas.