基于临近比较的快速拉曼光谱基线校正方法

拉曼光谱成像技术是基于拉曼散射效应所开发的一项现代检测技术,在现代生产、科学研究过程中使用非常广泛。拉曼光谱信号受荧光效应和仪器等方面的影响,往往会产生基线漂移,严重影响对信号特征的进一步提取。因此,必须对拉曼光谱信号进行基线校正。传统的基线校正方法,只针对单一光谱信号,计算量较大,在处理由大量拉曼信号组成的成像数据时,耗时较长且效果不佳。该文提出一种基于临近比较的快速基线校正方法,根据在相同背景下采集的光谱之间的相关性,实现快速基线校正,提高了拉曼成像数据的处理速度。

A Fast Baseline Correction Method for Raman Spectroscopy Based on Comparison

Raman imaging is a kind of modern testing technology based on Raman scattering,which has been widely applied in manufacturing and scientific research.However,due to the fluorescent effect and instruments drift,the baseline shift could easily occur,which has a strong impact on the feature extraction of the Raman signals.Therefore,the baseline correction is necessary and inevitable in the signal processing of Raman spectra.The traditional baseline correction methods can only correct the Raman spectrum one by one,so once a large amount of Raman imaging signals have to be processed,the processing time is too long to accept.In this paper,the baseline correction base on comparison which considers the correlation between the Raman spectra and the same background is proposed to realize the fast baseline correction and improve the processing speed of Raman imaging data.