包含特征值与特征向量的提取、训练样本以及最后的识别，雅克比迭代求解线性方程组课设,结合PCA的尺度不变特征变换(SIFT)算法。- Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Jacobi iteration for solving linear equations class-based, Combined with PCA scale invariant feature transform (SIFT) algorithm.