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Proceedings Paper

Automatic quality and ripeness inspection system
Author(s): Jing Fang; Rudolf L. van Renesse
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Paper Abstract

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.

Paper Details

Date Published: 1 August 1990
PDF: 12 pages
Proc. SPIE 1265, Industrial Inspection II, (1 August 1990); doi: 10.1117/12.20248
Show Author Affiliations
Jing Fang, Bergische Univ. GH-Wuppertal (China)
Rudolf L. van Renesse, TNO Institute of Applied Physi (Netherlands)

Published in SPIE Proceedings Vol. 1265:
Industrial Inspection II
Donald W. Braggins, Editor(s)

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