Near-IR and color imaging for bruise detection on Golden Delicious apples

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

doi:10.1117/12.144042

12 May 1993 Near-IR and color imaging for bruise detection on Golden Delicious apples

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

Proceedings Volume 1836, Optics in Agriculture and Forestry; (1993) https://doi.org/10.1117/12.144042
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

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.

Citation Download Citation

James A. Throop, Daniel J. Aneshansley, and Bruce L. Upchurch "Near-IR and color imaging for bruise detection on Golden Delicious apples", Proc. SPIE 1836, Optics in Agriculture and Forestry, (12 May 1993); https://doi.org/10.1117/12.144042

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