研究目的
To introduce a new methodology for dimensionality reduction and classification of hyperspectral images (HSI) that takes into account both spectral and spatial information based on mutual information, aiming to improve classification accuracy.
研究成果
The proposed method, combining spectral and spatial information via GLCM features and mutual information, significantly improves classification accuracy and reduces computational time compared to state-of-the-art methods. It demonstrates the importance of dimensionality reduction as a preprocessing step in HSI classification. Future work could focus on optimizing the method for better performance across different types of land cover.
研究不足
The method may require further optimization for enhanced performance. The computational time increases with the size of the datasets, and the effectiveness of texture features varies with the type of land cover (agricultural vs. urban areas).
1:Experimental Design and Method Selection:
The study combines spectral and spatial information for dimensionality reduction and classification of HSI. Spatial information is characterized by texture features extracted from the GLCM (Homogeneity, Contrast, Correlation, and Energy). Mutual information is used for band selection, and SVM is employed for classification.
2:Sample Selection and Data Sources:
Three well-known hyperspectral benchmark datasets captured by AVIRIS and ROSIS sensors are used.
3:List of Experimental Equipment and Materials:
Hyperspectral images from AVIRIS and ROSIS sensors, MATLAB for implementation, and Libsvm package for SVM classification.
4:Experimental Procedures and Operational Workflow:
The proposed algorithm involves extracting texture features from GLCM, combining them with spectral information via mutual information for band selection, and classifying the reduced dataset using SVM.
5:Data Analysis Methods:
Performance is assessed using individual class accuracy (ICA), overall accuracy (OA), and kappa coefficient (k). Computational time is also considered.
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