This invention provides a method to interpret and recognize huma faces. The
2nd-order eigenfeatures are used for lighting-invariant face description
and both the 1st-order and 2nd-order eigenfeatures are used
for view-angle-invariant face description. After normalization and quantization,
these features can describe face effectively and efficiently. In order to further
reduce the size of face descriptor, variable length code can be used to encode
the quantized eigenfeatures. This invention can be used in internet multimedia
database retrieval, digital library, video editing, surveillance and tracking,
and other applications using face recognition and verification.