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Proceedings Paper

Near-IR and color imaging for bruise detection on Golden Delicious apples
Author(s): James A. Throop; Daniel J. Aneshansley; Bruce L. Upchurch
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Paper Abstract

Digital images of reflected light in both the near-infrared (NIR) and visible wavelengths from the surface of bruised and unbruised Golden Delicious apples were captured for classifying bruise damage. Each of the attributes of two models for color representation, RGB and HSI, were compared to NIR for their ability to discriminate bruised from unbruised tissue. The surface reflectance for good tissue decreased from the fruit center outward, except saturation which increased. Reflectance of good tissue also varied adjacent to the bruised area compared to a location 60 degrees away. NIR, green, hue, and red were the features which showed the most contrast between bruised and undamaged tissue. This contrast did not decrease for green, red, and hue as storage time increased.

Paper Details

Date Published: 12 May 1993
PDF: 12 pages
Proc. SPIE 1836, Optics in Agriculture and Forestry, (12 May 1993); doi: 10.1117/12.144042
Show Author Affiliations
James A. Throop, Cornell Univ. (United States)
Daniel J. Aneshansley, Cornell Univ. (United States)
Bruce L. Upchurch, USDA Agricultural Research Service (United States)

Published in SPIE Proceedings Vol. 1836:
Optics in Agriculture and Forestry
James A. DeShazer; George E. Meyer, Editor(s)

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