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- Title
基于连续统去除法的枸杞叶片含水率高光谱估算.
- Authors
李永梅; 王浩; 赵勇; 张立根
- Abstract
In order to explore the potential of continuum removal method for estimating water content of Lycium barbarum leaves, Ningxia L. barbarum main plant variety Ningqi 7 was used as research object, the natural water loss method and drying method were used to determine the water content of L. barbarum leaf and the original spectral reflectance was processed by continuum removal method. Response characteristics of the continuum removal spectra to water content were analyzed, and correlation between the continuum removal spectra, absorption valley characteristic parameters and water content of leaves was analyzed, and a model for estimating water content of L. barbarum leaves was established. The result showed that continuum removal spectra could amplify the response characteristics of absorption valley band to water content, and the spectral reflectance in 1 100-2 200 nm band was the most responsive to the water change of L. barbarum leaves. The correlation between continuum removal spectra and water content of leaves in 1 500-1 850 nm band was enhanced. The multiple regression model based on the right area of the absorption peak in 900-1 100 nm band, the right area of the absorption peak in 1 270-1 700 nm band, and the total area of the absorption peak in 1 100-1 270 nm band was the best, its modeling set coefficient of determination was 0.787 0, validation set coefficient of determination was 0.800 3, root mean square error was 0.683 3 and mean relative error was 0.72%, which could be used to quantitatively estimate water content of L. barbarum leaves.
- Subjects
STANDARD deviations; SPECTRAL reflectance; CULTIVARS; WATER use; REGRESSION analysis
- Publication
Acta Agriculturae Zhejiangensis, 2022, Vol 34, Issue 4, p781
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2022.04.14