A fast automatic algorithm is proposed for baseline correction of infrared (IR) spectral signals. It is devised based on iterative curve fitting where orthogonal polynomials are used. The algorithm can process both emission and absorption spectra automatically without human intervention. Orthogonal polynomials are used for curve fitting to reduce computation time. Both emission and absorption spectra are obtained and the results demonstrate the feasibility and practicability of this algorithm.
© 2007 Chinese Optics Letters
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.6340) Spectroscopy : Spectroscopy, infrared
Tiange Lan, Yonghua Fang, Wei Xiong, and Chao Kong, "Automatic baseline correction of infrared spectra," Chin. Opt. Lett. 5, 613-616 (2007)