Use of discrete gradient operators for the automatic determination of vanishing points: Comparative analysis. - José Ignacio Rojas-Sola; Antonio Romero-Manchado (Expert Syst. Appl., 2012)

Application of gradient-based edge detectors to determine vanishing points in monoscopic images: Comparative study. - Antonio Romero-Manchado; José Ignacio Rojas-Sola (Image Vis. Comput., 2015)