Real-time constrained linear discriminant analysis for hyperspectral imagery

Qian Du; Hsuan Ren

doi:10.1117/12.441377

25 September 2001 Real-time constrained linear discriminant analysis for hyperspectral imagery

Qian Du, Hsuan Ren

Proceedings Volume 4548, Multispectral and Hyperspectral Image Acquisition and Processing; (2001) https://doi.org/10.1117/12.441377
Event: Multispectral Image Processing and Pattern Recognition, 2001, Wuhan, China

Abstract

A constrained linear discriminant analysis (CLDA) approach is presented for hyperspectral image detection and classification. Its basic idea is to design an optimal transformation matrix which can maximize the ratio of inter- class distance to intra-class distance while imposing the constraint that different class centers after transformation are along different directions such that different classes can be better separated. The solution turns out to be a constrained version of orthogonal subspace projection (OSP) implemented with a data whitening process. The CLDA approach can be applied to solve both detection and classification problems. In particular, by introducing color for display the classification is achieved with a single classified image where a predetermined color is used to display a specified class. The real-time implementation is also developed to meet the requirement of on-line image analysis when immediate data assessment is critical. The experiments using HYDICE data demonstrate the strength of CLDA approach in discriminating the small targets with subtle spectral difference.

Citation Download Citation

Qian Du and Hsuan Ren "Real-time constrained linear discriminant analysis for hyperspectral imagery", Proc. SPIE 4548, Multispectral and Hyperspectral Image Acquisition and Processing, (25 September 2001); https://doi.org/10.1117/12.441377

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