Spectral baseline correction method based on DE algorithm and non-uniform B-spline curve

• Main Authors: LIAN XIAOQIN, WANG YUQIAO, CHEN YANMING, GONG YONGGANG, LIU YU, HUO LIANGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 25.10.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a spectrum baseline correction method based on a DE algorithm and a non-uniform B-spline curve, and aims at a baseline drift phenomenon in an ICP-AES detection system, the standard deviation of a minimum value sequence in a spectrum baseline correction process is used as an evaluation index, the non-uniform B-spline curve is used as a baseline model, and the baseline drift phenomenon in the spectrum baseline correction process is calculated. And establishing a spectrum baseline correction evaluation function by taking a control point sequence C and an inner contact sequence T of the curve as characteristic parameters of the evaluation function, solving an optimal solution of the evaluation function by utilizing a differential evolution algorithm, and fitting an NURBS curve as a spectrum baseline, thereby correcting the spectrum curve. The problems that an existing common baseline correction method is large in limitation and high in operand are solved. A non-uniform B-spline is used for