4 October 2017 Optimizing classification performance in an object-based very-high-resolution land use-land cover urban application
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Abstract
This study evaluates the impact of three Feature Selection (FS) algorithms in an Object Based Image Analysis (OBIA) framework for Very-High-Resolution (VHR) Land Use-Land Cover (LULC) classification. The three selected FS algorithms, Correlation Based Selection (CFS), Mean Decrease in Accuracy (MDA) and Random Forest (RF) based Recursive Feature Elimination (RFE), were tested on Support Vector Machine (SVM), K-Nearest Neighbor, and Random Forest (RF) classifiers. The results demonstrate that the accuracy of SVM and KNN classifiers are the most sensitive to FS. The RF appeared to be more robust to high dimensionality, although a significant increase in accuracy was found by using the RFE method. In terms of classification accuracy, SVM performed the best using FS, followed by RF and KNN. Finally, only a small number of features is needed to achieve the highest performance using each classifier. This study emphasizes the benefits of rigorous FS for maximizing performance, as well as for minimizing model complexity and interpretation.
Conference Presentation
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Stefanos Georganos, Stefanos Georganos, Tais Grippa, Tais Grippa, Sabine Vanhuysse, Sabine Vanhuysse, Moritz Lennert, Moritz Lennert, Michal Shimoni, Michal Shimoni, Eléonore Wolff, Eléonore Wolff, } "Optimizing classification performance in an object-based very-high-resolution land use-land cover urban application", Proc. SPIE 10431, Remote Sensing Technologies and Applications in Urban Environments II, 104310I (4 October 2017); doi: 10.1117/12.2278482; https://doi.org/10.1117/12.2278482
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