Further, automatic alignment of the stack images uses Fourier cross-correlation, although manual alignment is also possible. Alignment of the stack is followed by normalization by the incident flux recorded as mentioned previously which is also automatized in most of the available analysis tools. Semi-quantitative comparison of different spectra, obtained from different regions on the same sample or from different samples, can be done by comparing the post-edge jumps. Edge-normalized XAS spectra can be used to obtain relative information of specific chemical functionalities.