CAJ | 학술논문

基线校准是极其重要的光谱预处理步骤，能够显著提高后续光谱分析算法的准确性。目前基线校准算法大多数都是手动或半自动的，手动基线校准算法完全依赖于用户的经验，个人主观因素会严重影响基线校准的准确性，半自动基线校准需要针对不同的拉曼光谱设置不同的优化参数，使用不便。提出了一种局域动态移动平均（LDM A ）全自动基线校准算法，并且详细阐明了该算法的基本思想和具体算法步骤。该算法采用了改进移动平均算法（MMA）实现拉曼光谱峰的逐渐剥离，通过自动识别原始拉曼光谱的基线子区间来将整个拉曼光谱区间自动分割为多个拉曼峰子区间，从而实现了在每个拉曼峰子区间中动态改变MMA窗口半宽度和控制平滑迭代次数，最大程度地避免了基线校准过度和基线欠校准现象。无论对于凸形基线、指数形基线、反曲线形基线模拟拉曼光谱，还是真实物质的拉曼光谱，LDM A全自动基线校准算法都取得了很好的基线校准效果。
기선교준시겁기중요적광보예처리보취，능구현저제고후속광보분석산법적준학성。목전기선교준산법대다수도시수동혹반자동적，수동기선교준산법완전의뢰우용호적경험，개인주관인소회엄중영향기선교준적준학성，반자동기선교준수요침대불동적랍만광보설치불동적우화삼수，사용불편。제출료일충국역동태이동평균（LDM A ）전자동기선교준산법，병차상세천명료해산법적기본사상화구체산법보취。해산법채용료개진이동평균산법（MMA）실현랍만광보봉적축점박리，통과자동식별원시랍만광보적기선자구간래장정개랍만광보구간자동분할위다개랍만봉자구간，종이실현료재매개랍만봉자구간중동태개변MMA창구반관도화공제평활질대차수，최대정도지피면료기선교준과도화기선흠교준현상。무론대우철형기선、지수형기선、반곡선형기선모의랍만광보，환시진실물질적랍만광보，LDM A전자동기선교준산법도취득료흔호적기선교준효과。
The baseline correction is an extremely important spectral preprocessing step and can significantly improve the accura-cy of the subsequent spectral analysis algorithm .At present most of the baseline correction algorithms are manual and semi-auto-mated .The manual baseline correction depends on the user experience and its accuracy is greatly affected by the subjective fac-tor .The semi-automated baseline correction needs to set different optimizing parameters for different Raman spectra ,which will be inconvenient to users .In this paper ,a locally dynamically moving average algorithm (LDMA) for the fully automated baseline correction is presented and its basic ideas and steps are demonstrated in detail .In the LDM A algorithm the modified moving av-eraging algorithm (MMA) is used to strip the Raman peaks .By automatically finding the baseline subintervals of the raw Raman spectrum to divide the total spectrum range into multi Raman peak subintervals ,the LDMA algorithm succeed in dynamically changing the window half width of the MMA algorithm and controlling the numbers of the smoothing iterations in each Raman peak subinterval .Hence ,the phenomena of overcorrection and under-correction are avoided to the most degree .The LDMA al-gorithm has achieved great effect not only to the synthetic Raman spectra with the convex ,exponential ,or sigmoidal baseline but also to the real Raman spectra .