牛眼肌区域大理石花纹评级特征的研究

针对我国牛肉分级制度中的大理石花纹等级评定特征不确定的问题,提出用几何、粒度及形状参数来表征花纹几何、形状及分布特点的方法。选择对牛肉大理石花纹等级评定起主要作用的特征参数,对中国、美国及日本3个国家的牛肉等级图进行深入地研究,找寻3个国家牛肉大理石花纹分级标准的侧重点。对选取的参数数据进行相关性分析,剔除原特征集中相关性较强的特征,应用主成分分析法对影响大理石花纹等级的参数进行线性组合,选取适合的主成分建立大理石花纹的等级预测模型。

Marbling Grading Characteristics in Beef longissmus dorsi

In light of indefinite marbling characteristics in China＇s beef grading systems, a mathematical method was presented to characterize beef marbling based on geometric, distribution and shape parameters. Using chosen characteristic parameters playing an important role in beef marbling grading, the standard beef marbling images from the United States, Japan and China were studied to find the emphasis point of each country＇s beef marbling standard. The chosen characteristic parameters were correlated to eliminate the highly correlated features from the original ones. Principal component analysis was used for linear combination of the affecting parameters of beef marbling and the appropriate principal components were selected for establish- ing a marbling grading prediction model.