Optimal Ellipse Fitting Algorithm of Least Square Principle Based on Boundary
Li Li · Computer Technology and Development · 2013
It may have a certain bias between the device in the template image and new acquired image because of the deviation of the motion and mechanical error caused by PTZ(Pan-Tilt-Zoom) for mobile inspection robot.So how to locate the meter in a new acquired image is need to be solved.Present a fast elliptical target extraction method based on boundary that can effectively solve the extraction of the circular target in the image.The least squares ellipse fitting algorithm,all the sample points are involved in operations,so the final outcome produces the ellipse fitting bias and takes a long time.Adopt the least squares fitting algorithm based on the boundary,take the boundaries of the image edge extraction,piecewise fitting ellipse,ellipse and fitting out of the assessment,select the appropriate target to be detected elliptical area.Verifying the algorithm in the synthetic and actual image applications can fit oval with high precision,which can effectively deal with the extraction of the instrument dial.