Figure 2
From: A Statistical Approach of Background Removal and Spectrum Identification for SERS Data
Performance of four different BCMs on the spectrum of riboflavin. (a) The original spectra (black lines) and the estimated backgrounds (red lines) by NMM, PF, IRLS, and SABARSI. (b) the corresponding background-corrected spectra (black lines). The two blue boxes in the leftmost figures highlight the two regions where NMM performs poorly. (c) Background-corrected spectra by NMM at four different time points, 3,550, 3,560, 3,570, 3,580, and 3,590. The blue box corresponds to the second blue box in (b). Apparently, these are backgrounds that have not been successfully removed. (d) Background-corrected spectra by SABARSI at the same set of four different time points. With SABARSI, the background has been removed thoroughly, highlighting the true signals (red lines in the 650~900 frequency range).
