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牛肉嫩度的高光譜法檢測(cè)技術(shù)
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Profiles for Prediction of Beef Tenderness
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    摘要:

    為實(shí)現(xiàn)對(duì)牛肉嫩度的預(yù)測(cè)和分級(jí),構(gòu)建了試驗(yàn)用高光譜檢測(cè)系統(tǒng),,在400~1000 nm波長(zhǎng)范圍內(nèi)獲取牛肉表面的高光譜散射圖像,。從高光譜圖像中提取牛肉的反射光譜曲線,用step-wise逐步回歸法選擇 430,、496,、510、725,、760和828 nm 6個(gè)波長(zhǎng)建立了多元線性回歸模型,,用全交叉驗(yàn)證法驗(yàn)證模型的預(yù)測(cè)效果,模型的預(yù)測(cè)相關(guān)系數(shù)為0.96,,預(yù)測(cè)標(biāo)準(zhǔn)差為0.64 kg,。以嫩度6.0 kg為界將樣本分為嫩牛肉和粗糙牛肉2類,,特征波長(zhǎng)處反射值為變量,建立了正則判別函數(shù)對(duì)牛肉嫩度分級(jí),,用全交叉驗(yàn)證法驗(yàn)證訓(xùn)練的效果,。嫩牛肉分級(jí)準(zhǔn)確率為83.3%,較粗糙牛肉分級(jí)準(zhǔn)確率為90.9%,,總的分級(jí)準(zhǔn)確率為870%,。研究表明該預(yù)測(cè)和分級(jí)技術(shù)具有一定的可行性。

    Abstract:

    To predict and classify beef tenderness, a laboratory hyperspectral imaging system was developed to capture hyperspectral scattering images from the surface of beef samples in the spectral region of 400~1000nm. Reflectance spectral characters were obtained from hyperspectral image. By using the method of step-wise regression, six optimal bands, 430, 496, 510, 725, 760 and 828 nm were selected for establishing the multi-linear regression (MLR) model. The model gives good prediction values of beef WBSF with the correlation coefficient of cross validation of 0.96 and the standard error of cross validation of 0.64 kg. Based on the measured tenderness values, samples were divided into two classes, i.e., group 0 (<6.0 kg) and group 1 (>6.0 kg). From selected bands, canonical discriminant functions were built to divide samples into two classes. The full cross validation was employed with the classification accuracy of 83.3% and 90.9%. Resultingly, the overall accuracy of classification is 87.0%. This research demonstrates that the hyperspectral imaging technique is useful for nondestructive determination of beef tenderness.

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吳建虎,彭彥昆,江發(fā)潮,王偉,李永玉,高曉東.牛肉嫩度的高光譜法檢測(cè)技術(shù)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(12):135-138. Profiles for Prediction of Beef Tenderness[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(12):135-138.

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