Rapid discrimination of urine specific gravity using spectroscopy and a modified combination method based on SPA and spectral index
Cheng‐bo Yang,
Zhi‐long Cai,
Qing‐zhi Li
et al.
Abstract:To achieve high‐accuracy urine specific gravity discrimination and guide the design of four‐waveband multispectral sensors. A modified combination strategy was attempted to be proposed based on the successive projections algorithm (SPA) and the spectral index (SI) in the present study. First, the SPA was used to select four spectral variables in the full spectra. Second, the four spectral variables were mathematically transformed by SI to obtain SI values. Then, SPA gradually fusions the SI values and establis… Show more
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