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Completed project

Objective colour assessment options for the dried grape industry (DG15001)

Key research provider: Applied Horticultural Research
Publication date: Monday, February 6, 2017

What was it all about?

The best quality dried grapes are plump, golden and uniform throughout the batch. Light coloured fruit is worth significantly more than dark fruit, so the colour grade of fruit directly affects how much the grower is paid. Currently, experienced assessors grade dried grapes using defined criteria, but there is an element of subjectivity to the process.

In 2016, this project developed and tested a number of different methods for objectively measuring the colour of dried grapes.

One emerged as the most viable: capturing images of a bin sample using a simple office flatbed scanner, then analysing the images and determining a grade based on colour using a software program. This proved to be quick, cheap, easy for operators and consistently reliable.

Tests at Sunbeam’s facility in Red Cliffs, Victoria, supported the system’s usability and showed that the standard light source within the scanner allowed reliable assessment.

Related levy funds


Funding statement:
This project has been funded by Hort Innovation

Copyright © Horticulture Innovation Australia Limited 2017. The Final Research Report (in part or as whole) cannot be reproduced, published, communicated or adapted without the prior written consent of Hort Innovation (except as may be permitted under the Copyright Act 1968 (Cth)).