耶鲁大学的人脸库。虽然不是源程序，相信对于做人脸识别的人用处是非常大的。-Face library of Yale University. Very useful.

The extended Yale Face Database B contains 16128 images of 28 human subjects under 9 poses and 64 illumination conditions. The data format of this database is the same as the Yale Face Database B. Please refer to the homepage of the Yale Face Databas