Analysis of Harumanis mango fruit size by using digital image analysis

Abstract

Harumanis mango is now popular in Malaysia because of its fragrant smell and sweet taste. Harumanis mango is the iconic product in Perlis. Therefore, the quality and productivity of Harumanis mango should be maintained. Greenhouse technology were introduced to help farmer to maintain the productivity of Harumanis mango. Hence, by planting the Harumanis mango in the greenhouse, the production of Harumanis mango can be controlled. The factors of growth are light, temperature, humidity and air composition. This factor may be affecting the quality of Harumanis mango. Fruit sizing is important to predict the maturity and operation of harvesting time. Farmer still use conventional method to measure the size of Harumanis mango. The conventional method is not consistent and time consuming. This method also requires higher cost because need more workers to complete the task on time. The objective of this research to evaluate the optimum distance and height of image acquisition of Harumanis mango and to propose the correlation factor of the fruit size. This research investigates the fruit size using digital image analysis. The correlation factor of measured size of Harumanis mango by using digital vernier calliper between digital image analysis was presented to determine the relationship between both parameters. The images of Harumanis mango were captured by smartphone camera. The main purpose of this paper is to study the different position of smartphone camera during acquisition of the image of Harumanis mango. The position of smartphone camera is varied 1 m, 2 m and 3 m from the fruit and 0.5 m, 1.0 m and 1.5 m from the ground. The captured image is analysed by using MATLAB software. The method of analysis fruit size using digital image analysis is easy-to-use in agriculture sector to determine the size of fruit. The result shows the optimum position of smartphone camera to captured the good quality image is around 1.0 m from ground and 2.0 m from fruit and the correlation factor between both methods is 0.8572 cm.