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Proceedings Paper

Digital TAcy: proof of concept
Author(s): Annie Bubel; Jean-François Sylvain; François Martin
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Paper Abstract

Anthocyanins are water soluble pigments in plants that are recognized for their antioxidant property. These pigments are found in high concentration in cranberries, which give their characteristic dark red color. The Total Anthocyanin concentration (TAcy) measurement process requires precious time, consumes chemical products and needs to be continuously repeated during the harvesting period. The idea of the digital TAcy system is to explore the possibility of estimating the TAcy based on analysing the color of the fruits. A calibrated color image capture set-up was developed and characterized, allowing calibrated color data capture from hundreds of samples over two harvesting years (fall of 2007 and 2008). The acquisition system was designed in such a way to avoid specular reflections and provide good resolution images with an extended range of color values representative of the different stages of fruit ripeness. The chemical TAcy value being known for every sample, a mathematical model was developed to predict the TAcy based on color information. This model, which also takes into account bruised and rotten fruits, shows a RMS error of less than 6% over the TAcy interest range [0-50].

Paper Details

Date Published: 4 August 2009
PDF: 7 pages
Proc. SPIE 7386, Photonics North 2009, 73861G (4 August 2009); doi: 10.1117/12.839484
Show Author Affiliations
Annie Bubel, INO (Canada)
Jean-François Sylvain, Atoka Cranberries Inc. (Canada)
François Martin, INO (Canada)

Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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