Then, orthogonal transform is introduced for both feature compression and the establishment of statistical model of the template that represents the normal condition. 本文引入正交变换,一方面实现了数据的大规模压缩,另一方面完成了代表正常工况的母体模型的建立;
Based on the general calculating formula of 2D all-phase template under arbitrary orthogonal transform, the concise formula of all-phase template with window under DFT is deduced. 在严格证明任意正交变换下的2维全相位模板的计算通式基础上,进一步推导出傅里叶变换下的加窗全相位模板的简化公式。