Detection of internal browning in apples by light transmittance

Bruce L. Upchurch; James A. Throop; Daniel J. Aneshansley

doi:10.1117/12.198891

6 January 1995 Detection of internal browning in apples by light transmittance

Bruce L. Upchurch, James A. Throop, Daniel J. Aneshansley

Proceedings Volume 2345, Optics in Agriculture, Forestry, and Biological Processing; (1995) https://doi.org/10.1117/12.198891
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

Abstract

Light transmittance in the 450 to 1050 nanometer (nm) region was evaluated as a nondestructive technique for identifying apples with internal browning. Shorter wavelengths of light (< 800 nm) were attenuated more than longer wavelengths (> 800 nm). A transmission difference between 720 and 810 nm was used to segregate apples with internal browning from good apples. Only 7.4% of the apples were misclassified in a training set. When applied to a larger validation set, 8.0% of the apples with internal browning were misclassified. For both sets, the only apples misclassified were those with very slight browning that was very difficult to detect visually were misclassified, but none of the apples with slight to severe browning was misclassified. For nondefective apples, 6.1% were identified as having internal browning, because bruises and internal browning had the same effect on the spectral composition.

Citation Download Citation

Bruce L. Upchurch, James A. Throop, and Daniel J. Aneshansley "Detection of internal browning in apples by light transmittance", Proc. SPIE 2345, Optics in Agriculture, Forestry, and Biological Processing, (6 January 1995); https://doi.org/10.1117/12.198891

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