Inspection for Grapefruit’s Shape Based on Image Processing Technology

Abstract

Grapefruit’s shape is a most important characteristic which effects Grapefruit’s classification directly. In order to realize inspection for Grapefruit’s shape, the algorithm of Sobel is firstly implemented in extracting Grapefruit’s contour. And then calculate directional angle of all the pixel on contour. On the basis of that, the function of Grapefruit’s shape difference is established to quantize shape’s difference between Grapefruits. The ineligible Grapefruit’s shape is distinguished through setting shape’s difference threshold. The final experiment prove its effectiveness, Grapefruit’s shape inspecting accuracy rate reach 92.24%. The algorithm not only has advantage of practicality, generality and convenience but also is significant for academic research.