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Proceedings Paper

Online inspection of poultry carcasses using a visible/near-infrared spectrophotometer
Author(s): Yud-Ren Chen; William R. Hruschka; Howard Early
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Paper Abstract

The Instrumentation and Sensing Laboratory (ISL) has developed an industrial prototype diode-array visible/near-infrared (Vis/NIR) spectrophotometer system for inspecting poultry for diseased and defective carcasses on-line. The ISL design is based on the principle that wholesome and diseased and defective birds have different chemical compositions of tissues and may have different skin color. This visible/near- infrared spectrophotometer system has been tested off-line at 60 and 90 birds per minute. On-line trials of the visible/near-infrared chicken carcass inspection system were conducted during an 8-day period in a slaughter plant in New Holland, Pennsylvania, where spectra (470 - 960 nm) of 1174 normal and 576 abnormal (diseased and/or defective) chicken carcasses were measured. The instrument measured the spectra of veterinarian-selected carcasses as they passed on a processing line at a speed of 70 birds per minute. Classification models using principal component analysis as a data pretreatment for input into neural networks were able to classify the carcasses from the spectral data with a success rate of 95%. Data from 3 days can predict the subsequent two days' chickens with high accuracy. This accuracy was consistent with the results obtained previously on off-line studies. Thus, the method shows promise for separation of diseased and defective carcasses from wholesome carcasses in a partially automated inspection system. Details of the models using various training regimens are discussed.

Paper Details

Date Published: 12 January 1999
PDF: 10 pages
Proc. SPIE 3544, Pathogen Detection and Remediation for Safe Eating, (12 January 1999); doi: 10.1117/12.335775
Show Author Affiliations
Yud-Ren Chen, USDA Agricultural Research Service (United States)
William R. Hruschka, USDA Agricultural Research Service (United States)
Howard Early, USDA Food Safety and Inspection Service (United States)


Published in SPIE Proceedings Vol. 3544:
Pathogen Detection and Remediation for Safe Eating
Yud-Ren Chen, Editor(s)

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