基于高光谱图像光谱信息的牛肉大理石花纹分割  

Beef Marbling Segmentation Based on Hyperspectral Imaging

作　　者：孙啸[1] 逄滨[1] 刘德营[1] 陈坤杰[1] 

机构地区：[1]南京农业大学工学院,南京210031

出　　处：《农业机械学报》2013年第S1期177-181,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(31071565);公益性行业(农业)科研专项经费资助项目(201303083);江苏省高校优势学科建设工程项目

摘　　要：利用高光谱成像系统采集牛肉眼肌横截面400~1 000 nm波段的高光谱图像,对牛肉图像脂肪区域和肌肉区域光谱曲线进行对比分析,发现在不同波段,牛肉图像脂肪区域与肌肉区域的反射强度有明显不同。由脂肪区域与肌肉区域反射强度的比值曲线发现,在534 nm处牛肉图像脂肪区域和肌肉区域光谱反射强度有最大差值。采用中值滤波、区域生长和自动取阈值等图像处理方法,分别对牛肉的彩色原始图像和534 nm波长图像进行大理石花纹分割,结果显示,相较于原始彩色图像,基于534 nm波长牛肉图像分割出的大理石花纹,具有更高的分割精度。The cross section images of beef rib-eye in spectral region of 400 ~ 1 000 nm were collected by using a hyperspectral imaging system.With comparative analysis of the spectral curves of the fat regions and the muscle ones of beef rib-eye images,it was found that the reflection intensity of fat regions and muscles areas for beef rib-eye images in different spectral bands were obviously different.Fitting the reflection intensity ratio of the fat regions and muscle regions with the wavelength,it could be concluded that,in the 534 nm band,the difference between the reflection intensity of fat regions and the one of muscle regions was the maximum.The image processings such as median filtering,region growing and Otsu's thresholding etc.were conducted on the original color beef rib-eye images and the 534 nm-band beef rib-eye images for the segmentation of the beef marbling,respectively.The result showed that the higher segmentation accuracy of beef marbling could be obtained by using the 534 nm-band beef rib-eye images compared with the original color beef rib-eye images.

关 键 词：牛肉 大理石花纹 高光谱图像 图像分割 

分 类 号：TS251.7[轻工技术与工程—农产品加工及贮藏工程]