Zhejiang University

Yitian Wang

Yibin Ying

Xiuqin Rao

Yanning Zhang

Xiaomin Zhang

Yangyang Lin

Haiyi Jiang

A method for extracting Raman characteristic peaks employing improved principal component analysis comprising: using a confocal microscopic Raman-spectroscopic instrument to collect Raman spectroscopic data from surfaces of pork and beef samples; and performing preprocessing on the Raman spectroscopic data, performing principal component analysis, establishing a principal component loading scatter plot, extracting dot characteristics from the principal component loading scatter plot, analyzing same, and performing filtering on the dot characteristics to obtain Raman characteristic peaks. The method for extracting Raman characteristic peaks employing improved principal component analysis is used to extract Raman characteristic peaks from pork and beef samples, and then the Raman characteristic peaks are inputted into a classifier to undergo classification, thereby achieving high accuracy and quick classification.

Method for extracting raman characteristic peaks employing improved principal component analysis

In a grain sampling and imaging device, a grain bin () is located under a sampling body (), a grain feed connector () is fixed to a top of the sampling body (), an observation window () is installed on the sampling body (), a camera () is installed above the observation window (); grains fall to a grain feed connector (), and then into the sampling body (), and then are sieved by multiple passages of the sampling body (), a part of the grains randomly enter the observation window () and photographed by the camera (), and finally all of the grains enter the grain bin () through a discharge outlet () provided at a bottom of the sampling body ().

Grain sampling and imaging device

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Zhejiang, China

Yitian Wang