Scale Space Radon Transform for Non Overlapping Thick Ellipses Detection

This paper presents a new elliptical structure detection method, combining the advantages of the multiscale Hessian, and the scale space Radon transform (SSRT) for an ellipse. The advantage of the former is twofold: highlighting the lines defining the ellipses present in the image and reducing the search space for these ellipses in the SSRT space, which will discard the false SSRT maxima. The subsequent application of the SSRT permits, in turn, to alleviate the computation load and to obtain, moreover, a good detection of thick ellipses when they are not threadlike. Experiments carried out on synthetic and real images have shown good detection of thick ellipses, with low computational overhead compared to the Elliptical Radon transform.