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Estimating Maturity of Paddy Using RGB Colour Space

Norsolehah Azman, Siti Khairunniza-Bejo, Wan Ishak Wan Ismail, and AimrunWayayok
Department of Biological and Agricultural Engineering, Faculty of Engineering, University of Putra Malaysia, 43400 Serdang, Selangor, Malaysia
Abstract—Colour plays important role in evaluating quality and maturity level of many agricultural products. Immature paddy has been defined as kernels or pieces of grain kernels that are not fully developed and are yellow-green in colour. Immature paddy will caused broken rice and losses during storage. This paper presents a new technique of paddy maturity estimation using various colour indices extracted from RGB colour spaces. Paddy samples were taken during 96 and 98 Days After Planting (DAP). Results has shown that there are significant relationships between all of the colour indices with the DAP. The strongest significant relationship can be gathered from G-B colour index, with R= -0.924 (p>0.001). A linear regression model was later being developed based on G-B colour index defined as MATURITY=-16.95 (G-B)+101.61.

Index Terms—paddy, maturity, RGB, colour indices, image analysis.

Cite: Norsolehah Azman, Siti Khairunniza-Bejo, Wan Ishak Wan Ismail, and AimrunWayayok, "Estimating Maturity of Paddy Using RGB Colour Space," Journal of Advanced Agricultural Technologies, Vol. 1, No. 2, pp. 119-124, December 2014. Doi: 10.12720/joaat.1.2.119-124
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