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移动窗口二维相关光谱是一种新的二维相关分析方法,它将移动窗口的概念和二维相关分析方法有效地结合在了一起,利用移动窗口将庞大的光谱数据按矩阵分割成若干个便于操作的子矩阵,用二维相关光谱分别处理,将得到的结果综合分析,用以光谱变量和扰动变量为坐标的等高图表现出来,从中可以非常直观地观察出光谱强度在扰动变量方向上的变化,进而找出引起光谱强度突变的特征扰动点。本文主要介绍了移动窗口二维相关光谱的计算方法、基本特征、影响因素和实际应用,同时,还详细介绍了以其为基础改进得到的扰动相关移动窗口二维相关光谱。扰动相关移动窗口二维相关光谱包括同步图和异步图,它不仅能很好地反映出引起光谱强度突变的特征扰动,还能详尽地描述出光谱强度在扰动过程中的变化情况。
Two-dimensional correlation spectrum of moving window is a new two-dimensional correlation analysis method, which combines the concept of moving window with two-dimensional correlation analysis method effectively, and uses the moving window to divide the huge spectral data into several Easy-to-manipulate sub-matrices are separately processed by two-dimensional correlation spectroscopy. The results obtained are comprehensively analyzed and the contour plots of spectral variables and disturbance variables are plotted. From this, the spectral intensity can be observed very intuitively in the direction of the disturbance variable On the changes, and then find the cause of sudden changes in spectral intensity feature disturbance points. This paper mainly introduces the calculation method, basic characteristics, influential factors and practical application of two-dimensional correlation spectrum of moving window. At the same time, it also introduces the two-dimensional correlation spectrum of perturbed correlation moving window which is improved based on it. The two-dimensional correlation spectrum of perturbation-dependent moving window includes synchronous and asynchronous images. It can not only reflect the feature perturbation which caused the sudden change of spectral intensity, but also describe the change of spectral intensity during the perturbation in detail.