Thickness measurement and crease detection of wheat grains using stereo vision

Authors:
Changming Sun;Mark Berman;David Coward;Brian Osborne
Affiliations:
CSIRO Mathematical and Information Sciences, Locked Bag 17, North Ryde, NSW 1670, Australia;CSIRO Mathematical and Information Sciences, Locked Bag 17, North Ryde, NSW 1670, Australia;CSIRO Exploration and Mining, P.O. Box 136, North Ryde, NSW 1670, Australia;The Grains Research Centre, BRI Australia Ltd., P.O. Box 7, North Ryde, NSW 1670, Australia
Venue:
Pattern Recognition Letters
Year:
2007

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Abstract

Wheat grain quality assessment is important in meeting market requirements. The thickness of grains can be used for the measurement of the mass proportion of grains that pass through a sieve. This measure is known as ''screenings''. The determination of the presence or absence of the grain crease aids the detection of a stain called blackpoint, which is usually most evident on the non-crease side of the grain. In this paper we investigate the use of stereo vision techniques for measuring the thickness and detecting the presence or absence of the crease of a sample of wheat grains placed on a tray with dimples.