Abstract:An improved shift‐invariant wavelet (S‐I WT) de‐noising algorithm based on LLS operator is proposed for high‐resolution energy dispersive X‐ray fluorescence. Sym8 is chosen as the wavelet basis function and performed noise reduction on the analog signal. Comparison of the de‐noising effect of S‐I WT, improved WT and LLS S‐I WT (where LLS is the log square root operator) method are quantitatively evaluated by using evaluation criteria signal‐to‐noise‐ratio (SNR), root mean square error and Pearson correlation c… Show more
“…Prior to undertaking the data reduction through the dictionary learning algorithm, the MA-XRF data is compressed through a log-log-square root operator. 52 This operation is typically performed in conjunction with baseline removal (as with the SNIP algorithm). 53 Here the log-log-square root operator is used to emphasize minor spectral bands or features that would otherwise be suppressed or eliminated by the SVD decomposition.…”
X-ray fluorescence imaging is a common method of analysis in the field of heritage science. However, data processing and data interpretation remains challenging as it often requires a-priori knowledge of...
“…Prior to undertaking the data reduction through the dictionary learning algorithm, the MA-XRF data is compressed through a log-log-square root operator. 52 This operation is typically performed in conjunction with baseline removal (as with the SNIP algorithm). 53 Here the log-log-square root operator is used to emphasize minor spectral bands or features that would otherwise be suppressed or eliminated by the SVD decomposition.…”
X-ray fluorescence imaging is a common method of analysis in the field of heritage science. However, data processing and data interpretation remains challenging as it often requires a-priori knowledge of...
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