Simple two-stage method for the accurate location of Hough transform peaks
E. Roy Davies · IEE Proceedings E Computers and Digital Techniques · 1992
The paper describes a method for the rapid, accurate location of Hough transform peaks. First, it is recognised that votes may be rather sparsely distributed in parameter space, so a reliable means of clustering them is vital. Although this may be achieved by multiresolution techniques, an important consideration is that peaks are generally noisy and may be multimodal, so care must be taken over accurate location of any particular mode. The method described is two-stage and works by finding median positions in narrow strips passing through primary approx imate peaks.