Dr. Tianqi Tu Profile

Dr. Tianqi Tu

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Proceedings Article | 6 August 2021 Paper

Tensor-patch-based discriminative marginalized least squares regression for membranous nephropathy hyperspectral data classification

Tianhong Chen, Meng Lv, Yue Yang, Tianqi Tu, Wei Li, Wenge Li

Proceedings Volume 11913, 119130A (2021) https://doi.org/10.1117/12.2604862

KEYWORDS: Hyperspectral imaging, Tissues, Kidney, Tissue optics, Picosecond phenomena, Medical imaging, Lithium, Image classification, Distance measurement, Biopsy

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Least squares regression (LSR)-based classifiers are effective in multi-classification tasks. For hyperspectral image (HSI) classification, the spatial structure information usually helps to improve the performance, however, most existing LSRbased methods use the spectral-vector as input which ignore the important correlations in the spatial domain. To solve the drawback, a tensor-patch-based discriminative marginalized least squares regression (TPDMLSR) is proposed to modify discriminative marginalized least squares regression (DMLSR) with consideration of inter-class separability by employing the region covariance matrix (RCM). RCM is adopted to exploit a region of interest around each hyperspectral pixel to characterize the intrinsic spatial geometric structure of HSI. Specifically, TPDMLSR not only maintains the ascendancy of DMLSR, but also preserves the spatial-spectral structure and enhances the ability of class discrimination for regression by learning the tensor-patch manifold term with a new region covariance descriptor and measuring the inter-class similarity more accurately. The experimental results on membranous nephropathy (MN) dataset validate that TPDMLSR significantly outperforms LSR-based methods reflected in sensitivity, overall accuracy (OA), average accuracy (AA) and Kappa coefficient (Kappa).

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