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Correlation between oil content and DN values Rashid Shariff, Nor Aizam Adnan, Radzali Mispan, Shattri Mansor, Rohaya Halim, and Roop Goyal Department of Biological & Agricultural Engineering, University Putra Malaysia, Malaysia rashid@eng.upm.edu.my Abstract This research investigates the correlation between oil content in the oil palm fruit against the color of the oil palm fruit. Images from samples of oil palm fruits were acquired using a camera with proper lighting and angle. Image processing and analysis of the samples was carried out. Physical measurements of the amount of oil content in the fruit were carried out by chemical analysis. This study revealed that there is a high positive correlation between the color of the oil palm fruit and the amount of oil in the fruit. This study will be of help in increasing the efficiency of quality harvesting and grading of oil palm fresh fruit bunches (ffb). Introduction Currently, oil palm fruitlet quality is graded manually. This method has some disadvantages. Firstly, it is an extremely tedious and time consuming process prone to errors or inconsistencies. It is inaccurate and has a strong bias towards the mill. So a new technique is needed in grading oil palm. This research project investigates the correlation between recognisable parameters of oil palm fruit such as color against the content of the oil palm fruit. The findings of this study will lay the foundation for better oil palm grading system.
This study is confined to only a single species of oil palm fruit. The Tenera species of oil palm fruit was used for this purpose because it has a thick mesocarp. Samples of this study are based on three kinds of ripeness of fruits which are known ripe, under ripe and over ripe. This study was conducted in a room that had proper lighting technique and with known distance between the camera and the fruit. The images covered the side view of the fruit and does not include the bottom of the fruits. This study did not involve the analysis of texture and shape. The focus of this study is the fruitlets and does not cover oil palm bunches
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