A prototype on-line AOTF hyperspectral image acquisition system for tenderness assessment of beef carcasses

作者:Naganathan Govindarajan Konda; Cluff Kim; Samal Ashok; Calkins Chris R; Jones David D; Lorenzen Carol L; Subbiah Jeyamkondan*
来源:Journal of Food Engineering, 2015, 154: 1-9.
DOI:10.1016/j.jfoodeng.2014.12.015

摘要

A prototype on-line acousto-optic tunable filter (AOTF)-based hyperspectral image acquisition system (lambda = 450-900 nm) was developed for tenderness assessment of beef carcasses. Hyperspectral images of ribeye muscle on stationary hanging beef carcasses (n = 338) at 2-day postmortem were acquired in commercial beef slaughter or packing plants. After image acquisition, a strip steak was cut from each carcass, vacuum packaged, aged for 14 days, cooked, and slice shear force tenderness scores were collected by an independent lab. Beef hyperspectral images were mosaicked together and principal component (PC) analysis was conducted to reduce the spectral dimension. Six different textural feature sets were extracted from the PC images and used in Fisher's linear discriminant model to classify beef samples into two tenderness categories: tender and tough. The pooled feature model performed better than the other models with a tender certification accuracy of 92.9% and 87.8% in cross-validation and third-parry true validation, respectively. Two additional metrics namely overall accuracy and a custom defined metric called accuracy index, were used to compare the tenderness prediction models.

  • 出版日期2015-6