1. Improving Absorbance Spectrum Reconstruction via Spectral Data Decomposition and Pseudo-Baseline Optimization.
- Author
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Morawski, Roman Z. and Miękina, Andrzej
- Subjects
- *
SPECTRUM analysis , *DECONVOLUTION (Mathematics) , *ALGORITHMS , *ELECTRONIC data processing , *PROGRAM transformation , *TRANSDUCERS , *SPECTRUM analysis instruments - Abstract
This paper addresses the problem of reconstruction of the optical absorption spectra on the basis of low-resolution data provided by a spectrophotometric transducer. It is shown that the performance of the algorithms of (generalized) deconvolution with a built-in positivity constraint, which is frequently used for this purpose, deteriorates for data containing a considerable baseline (background). A new method for overcoming that limitation is proposed. It consists of the subtraction of a rough estimate of the baseline (called pseudo-baseline) from the data, reconstruction of the spectrum on the basis of the data modified in this way, and restoration of the pseudo-baseline in the final result of spectrum reconstruction. The proposed amelioration is illustrated by means of an algorithm of spectrum reconstruction based on Jansson's method of deconvolution. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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