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Bayesian linear classifier is the basic scheme to solve model classification basing on statistics. Face with the classification of three different nectar plant, the near infrared spectrum data was acquired. The character of the near infrared spectrums is known as litter sample and higher dimension. In this paper, the method has developed to acquire the feature wavelength based on genetic algorithm. It can solve the problem of the effective information extraction from the high-dimensional data matrix. The fitness function of genetic algorithm is been set to minimize the error rate of classification. The K-S algorithm was used to construct the calibration set and validation set. There are 132 samples in the calibration set and 42 samples in the validation set. The feature wavelengths were acquired respectively basing on different preprocessing. The result indicates using the 10 feature wavelengths based on raw data can obtain best resolution compare with the principal component analysis -linear discriminate analysis model. The result indicated that the GA-LDA classifier can made the model to be simplified and the correction rate can be increased evidently after using the feature wavelength.
Date of Conference: 2-4 April 2010