Ensemble of ERDTs for Spectral–Spatial Classification of Hyperspectral Images Using MRS Object-Guided Morphological Profiles

• Main Authors: Alim Samat, Erzhu Li, Sicong Liu, Zelang Miao, Wei Wang
• Format: Article
• Language: English
• Published: MDPI AG 2020-10-01
• Series: Journal of Imaging
• Subjects: MPs; OMPs; ERDT ensemble of ERDTs (EERDTs); ExtraTrees; multiresolution segmentation (MRS); hyperspectral
• Online Access: https://www.mdpi.com/2313-433X/6/11/114

In spectral-spatial classification of hyperspectral image tasks, the performance of conventional morphological profiles (MPs) that use a sequence of structural elements (SEs) with predefined sizes and shapes could be limited by mismatching all the sizes and shapes of real-world objects in an image. To overcome such limitation, this paper proposes the use of object-guided morphological profiles (OMPs) by adopting multiresolution segmentation (MRS)-based objects as SEs for morphological closing and opening by geodesic reconstruction. Additionally, the ExtraTrees, bagging, adaptive boosting (AdaBoost), and MultiBoost ensemble versions of the extremely randomized decision trees (ERDTs) are introduced and comparatively investigated for spectral-spatial classification of hyperspectral images. Two hyperspectral benchmark images are used to validate the proposed approaches in terms of classification accuracy. The experimental results confirm the effectiveness of the proposed spatial feature extractors and ensemble classifiers.