研究目的
To evaluate the efficacy of data fusion strategies for the HSI systems to improve blueberry bruising detection.
研究成果
The data fusion strategies at all three levels achieved better classification results than using push broom based and LCTF based HSI individually. The decision level fusion based on classification results with selected features yielded the best final classification results, demonstrating that the information obtained from the two imaging spectroscopic techniques has a synergistic effect.
研究不足
The study was limited to the fusion of spectral data from two imaging technologies. The application of the methodology could be expanded to other studies, but the challenge of fusing hyperspectral images at the pixel level remains.
1:Experimental Design and Method Selection:
The study involved the use of two hyperspectral imaging systems with complementary spectral ranges for detecting blueberry internal bruising. The mean reflectance spectrum of each berry sample was extracted and analyzed using feature selection methods, PLS-DA, and SVM. Three data fusion strategies at the data level, feature level, and decision level were applied.
2:Sample Selection and Data Sources:
A total of 320 Bluecrop blueberries and 384 Jersey blueberries were used, divided into groups for different time and physical treatments.
3:List of Experimental Equipment and Materials:
Push broom based HSI system (ICL-B1410 CCD camera, ImSpector V10E spectrograph, Fiber-Lite DC950 light source) and LCTF based HSI system.
4:Experimental Procedures and Operational Workflow:
Hyperspectral images were acquired, calibrated, and processed to extract mean reflectance spectra. Data fusion strategies were applied to the spectral data.
5:Data Analysis Methods:
Feature selection using the random frog algorithm, classification using PLS-DA and SVM, and data fusion at three levels.
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