Estimation of circular arcs using an L1 estimator in combination with the Hough transform

The accurate parametrization of the shapes within an image is a necessary requirement in many image processing applications including sorting, manufacturing, and quality control. As the adoption of image processing techniques increases, the need for accurate identification and definition of shapes and objects will undoubtedly increase. A technique is presented for the accurate determination of the parameters of circles and circular arcs within an image. The approach is based on an adaptation of L₁ estimation techniques