1 August 1990 Automatic quality and ripeness inspection system
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Proceedings Volume 1265, Industrial Inspection II; (1990) https://doi.org/10.1117/12.20248
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands
The feasibility of an opto-electronic inspection system for the sorting and grading of apples with respect to ripeness and quality is studied. This study comprises a detailed spectral analysis of the healthy skin as well as a variety of visual defects. Three different apple species were studied: Cox orange, Golden delicious and Golden rennet. Spectral wavebands of interest appear to be the chlorophyll peak around 570nm, the ripeness peak around 64Onrrt and the near infra-red beyond 75Onxn. Stem and calix of apples pose a separate problem because their spectral reflection cannot be distinguished from that of most visual defects. A solution for this problem is given.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jing Fang, Jing Fang, Rudolf L. van Renesse, Rudolf L. van Renesse, } "Automatic quality and ripeness inspection system", Proc. SPIE 1265, Industrial Inspection II, (1 August 1990); doi: 10.1117/12.20248; https://doi.org/10.1117/12.20248

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