是机器学习的例程，结合PCA的尺度不变特征变换(SIFT)算法，本程序的性能已经达到较高水平，多姿态，多角度，有不同光照,Relief计算分类权重，外文资料里面的源代码。- Machine learning routines, Combined with PCA scale invariant feature transform (SIFT) algorithm, The performance of the program has reached a high level, Much posture, multi-angle, have different light, Relief computing classification weight, Foreign materials inside the source code.