Individual compression of IR spectra in wavelet domain

Some additional calculations were performed for comparison sake, using as a criterion the RMS error of spectral reconstruction. In particular, each spectrum was compressed to the degree which allows it reconstruction with the RMS = 0.0127. This value corresponds to the mean value of RMS observed for the data compressed by PCA. or in the joint basis accounting for the 99% of data variance. DWT with RMS criterion (where RMS = 0.0127) leads to 66.8 wavelet coefficients. For illustrative purpose the original spectrum and the spectrum reconstructed with RMS = 0.0127 are presented in Fig. 6. 

Visu and CR criteria were used for the illustrative purpose only, i.e. in further discussion only the MDL and RMS criteria will be considered. Both these 

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