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CONTROL-BASED INVERSION FOR ESTIMATING BIOLOGICAL PARAMETER VECTOR FOR BIOPHYSICS MODEL FROM DIFFUSED REFLECTANCE DATA
CONTROL-BASED INVERSION FOR ESTIMATING BIOLOGICAL PARAMETER VECTOR FOR BIOPHYSICS MODEL FROM DIFFUSED REFLECTANCE DATA
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机译:基于控制的反演,从漫反射数据估计生物物理模型的生物参数矢量
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摘要
PROBLEM TO BE SOLVED: To provide a system and method for estimating a biological parameter vector using reflectance measurements obtained from a reflectance-based spectral measurement system.SOLUTION: The method uses a semi-empirical biophysics model to describe skin properties and estimated reflectance spectra, and reduces the dimensionality of the estimated reflectance spectra and measured reflectance spectra using basis vectors for computational efficiency. A mixture of algorithms is employed to generate an initial setting of parameters, which is further refined using an iterative control based technique in which an error between the parameters derived from the measured spectra are compared to the parameters calculated from the estimated spectra. These errors are then processed to generate a small delta to the initial set of parameters. The process is repeated until an error between the estimated virtual biological parameters and the measured virtual biological parameters falls to zero or is otherwise below a pre-defined threshold level.
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