基于改进光谱角制图算法的乳粉安全非定向筛查新方法  

A New Non-targeted Screening Method for Milk Powder Safety Based on Improved Spectral Angle Mapping

作　　者：宗婧 黄志轩 陈晓宇 陈达 ZONG Jing;HUANG Zhixuan;CHEN Xiaoyu;CHEN Da(School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Center for Aircraft Fire and Emergency,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]中国民航大学飞机防火及应急研究所,天津300300

出　　处：《食品科学》2020年第2期315-320,共6页Food Science

基　　金：“十三五”国家重点研发计划重点专项(2018YFF01011701);国家自然科学基金面上项目(21973111;61378048);国家自然科学基金青年科学基金项目(21305101)

摘　　要：提出一种基于移动窗口光谱角制图的拉曼高光谱成像方法(moving window spectral angle mapping Raman hyperspectral imaging method,MWSAM-RHIM),以实现乳粉安全的非定向筛查,有效弥补了传统定向检测方法的不足。在MWSAM-RHIM中,使用改进的光谱角制图算法计算待测样品光谱相似性,将超出正常阈值范围的像素点标记为掺杂,并生成可视化的二值图像。结果表明,MWSAM-RHIM对阴性和阳性样品的识别率均达到了93.3%,说明此方法可以满足乳制品安全的非定向筛查需求,并为其他食品样品的快速筛查提供一种新思路。In this paper,a moving window spectral angle mapping-based Raman hyperspectral imaging method(MWSAM-RHIM)was proposed for non-targeted screening for milk powder safety,which could effectively compensate for the shortcomings of traditional targeted detection methods.In MWSAM-RHIM,an improved spectral angle mapping algorithm was used to calculate the spectral similarity of unknown samples.The pixels beyond the threshold were marked as adulterated to generate a visual binary image.The results showed that the recognition rates of negative and positive samples by MWSAM-RHIM method both reached 93.3%,indicating that this method can meet the needs of non-targeted screening for safety of dairy products and provide a new idea for rapid screening of other food samples.

关 键 词：拉曼高光谱成像 乳粉安全 光谱角制图 非定向筛查 食品安全 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程]