Algorithm for Ellipse Detection Applied to Measurement of Fiber Orientation in Fiber Reinforced Composites
Yingying Li · Journal of Luoyang Institute of Science and Technology · 2009
Detection of ellipse is one of the most important issues in the field of pattern recognition,which plays an important role in the engineering application.In this paper,a novel algorithm for detecting ellipses is proposed,which is based on a sequential-scanning method of pixels with the consideration that the ellipses are filled and they are not intersectional or nesting.First,the center of the ellipse is searched out,and then the length and the slope coefficient of the minor axis is worked out to decide the endpoint of the minor axis,in this way,the length and slope coefficient of the major axis is calculated from elliptic equation.Experiments shows that this is an efficient algorithm which can accurately detect the ellipses in the picture of the intersection of the fiber reinforced composites,so it can be used to measure the fiber orientation of fiber reinforced composites.