Use of digital images to estimate CIE color coordinates of beef
Use of digital images to estimate CIE color coordinates of beef
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DOI：
10.1016/j.foodres.2008.01.002
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发表时间：
2008-01-01
影响因子：
8.1
通讯作者：
Reed, J. D.
中科院分区：
文献类型：
--
作者：
Larrain, R. E.;Schaefer, D. M.;Reed, J. D.
本研究的目的是评估使用数字图像（DI）来估计CIE L*a*B*，色调角和色度的牛肉，相比色度计（CM）。在模拟零售条件下，展示了21头高谷物日粮肉牛的里脊肉样品。从63个核心中获得颜色读数，涵盖了牛肉变色的全部光谱。CIE L*、a* 和B* 用表面反射率CM测量。从DI获得红色、绿色和蓝色（RGB）值，并依次转换到XYZ和CIE L*a*B* 颜色空间。从a* 和B* 值计算色调角和色度。CM对a*、色调角和色度的DI的回归具有0.93及以上的R-2值。未包括在回归中的13个样品的预测和实际CM L*、a* 和B* 值之间的平均色差（Δ E-ab*）为1.57，低于50%观察者报告的检测阈值。来自DI的颜色读数可以用于准确地预测CM测量的颜色坐标，特别是a*、色调角和色度。使用数字成像技术可以成为检测牛肉颜色和其他肌肉食物变化的实用工具。(c)2008爱思唯尔有限公司保留所有权利。
The objective of this study was to evaluate the use of digital images (DI) to estimate CIE L*a*b*, hue angle and chroma of beef, as compared to a colorimeter (CM). Loin samples from 21 steers finished with high grain diets were displayed under retail-simulated conditions. Color readings were obtained from 63 cores covering the full spectrum of discoloration in beef. CIE L*, a*, and b* were measured with a surface-reflectance CM. Red, green and blue (RGB) values were obtained from DI and sequentially transformed to XYZ and CIE L*a*b* color space. Hue angle and chroma were calculated from a* and b* values. Regressions of CM on DI for a*, hue angle and chroma had R-2 values of 0.93 and above. Average color difference (Delta E-ab*) between the predicted and the actual CM L*, a*, and b* values for 13 samples that were not included in the regressions was 1.57, below reported thresholds of detection for 50% of observers. Color readings from DI could be used to accurately predict color coordinates measured by CM, especially a*, hue angle and chroma. Use of digital imaging could become a practical tool to detect changes in beef color and other muscle foods. (c) 2008 Elsevier Ltd. All rights reserved.