利用半透射高光谱图像检测‘霞晖5号’水蜜桃冷害

doi:10.7506/spkx1002-6630-201502031

食品科学

利用半透射高光谱图像检测‘霞晖5号’水蜜桃冷害

张嫱1,2，潘磊庆1，屠康1,*

1.南京农业大学食品科技学院，江苏南京 210095；2.上海市食品药品监督管理局崇明分局，上海 202150

出版日期:2015-01-25 发布日期:2015-01-16
通讯作者: 屠康
基金资助:
国家自然科学基金青年科学基金项目（31101282）；公益性行业（农业）科研专项（201303088）

Detecting Chilling Injury of ‘Xiahui 5’ Peach by Hyperspectral Half-Transmittance Imaging

ZHANG Qiang1,2, PAN Leiqing1, TU Kang1,*

1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China;
2. Shanghai Municipal Food and Drug Administration Chongming Office, Shanghai 202150, China

Online:2015-01-25 Published:2015-01-16
Contact: TU Kang

摘要/Abstract

摘要：

研究应用半透射高光谱图像技术检测‘霞晖5号’水蜜桃冷害的方法。通过分析桃果实贮藏期间感官得分、褐变指数、硬度、出汁率的变化，经各指标间的相关性分析结果，将‘霞晖5号’水蜜桃的冷害进程分为0～3 级。进而对冷害桃果实400～1 000 nm波段的半透射高光谱图像进行采集，应用独立主成分分析（independent component analysis，ICA）方法和权重系数法优选出冷害的特征波长，半透射条件下波长为640、745 nm和811 nm同时得到了桃果实不同冷害阶段的半透射高光谱图像特征，并且冷害发生水蜜桃的ICA图像中具有黑色斑点部位。最终通过提取特征波长处的光谱平均值作为Fisher判别方法建模的特征集，建立了判别‘霞晖5号’水蜜桃不用冷害等级的模型并进行验证，验证组的总体正确率为91.0%。结果表明，半透射高光谱图像技术可以正确判别桃果实各阶段冷害。

关键词: 高光谱图像, 半透射, 水蜜桃, 冷害, 检测

Abstract:

Hyperspectral half-transmittance imaging technique was investigated for the detection of chilling injury in ‘Xiahui
5’ peach during storage. Sensory score, browning index, hardness and extractable juice content were measured. At the same
time, classification standard of chilling injury for ‘Xiahui 5’ peach was established based on the correlation of sensory score
with physicochemical values. Then, hyperspectral half-transmission images over the wavelength range of 400–1 000 nm
were captured. Independent component analysis (ICA) and weighting coefficients for ICA were implemented on the
pictures. The optimal wavelengths selected were 640, 745, and 811 nm. Hyperspectral half-transmission ICA images for
different injury levels of chilled peach were obtained, and black spots were found which indicated chilling injury. Finally,
the spectral average of each characteristic band was chosen as the input of the Fisher discrimination model, and an average
testing accuracy of 91.0% was achieved to distinguish chilled ‘Xiahui 5’ peach with different injury levels. This research
demonstrated that the hyperspectral half-transmittance imaging technique is feasible for the detection of chilled peach at
different injury levels.

Key words: hyperspectral imaging, half-transmittance, peach, chilling injury, detection

中图分类号:

TS255.2

张嫱1,2，潘磊庆1，屠康1,*. 利用半透射高光谱图像检测‘霞晖5号’水蜜桃冷害[J]. 食品科学, doi: 10.7506/spkx1002-6630-201502031.

ZHANG Qiang1,2, PAN Leiqing1, TU Kang1,*. Detecting Chilling Injury of ‘Xiahui 5’ Peach by Hyperspectral Half-Transmittance Imaging[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201502031.

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利用半透射高光谱图像检测‘霞晖5号’水蜜桃冷害

Detecting Chilling Injury of ‘Xiahui 5’ Peach by Hyperspectral Half-Transmittance Imaging

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