Paper Info
Title
Use of discrete gradient operators for the automatic determination of vanishing points: Comparative analysis
Abstract
Thales' second theorem can be used for the automatic detection of the vanishing points of an image. This paper explores its reliability and accuracy according to the type of operator used for the detection of edges. An algorithm has been used which processes a photographic image according to the operator selected. The result is a point cloud which is then used to find the desired solution. The comparison between the four discrete gradient operators (Frei-Chen, Prewitt, Roberts and Sobel) has been made taking into account the resolution of the image and the number of vanishing points. The results obtained show that Frei-Chen's operator shows good performance in determining vanishing points with respect to the spatial X axis, Sobel's operator is the best for determining the vanishing point with respect to the spatial Y axis, Roberts' operator gives good results for calculating vanishing points in both spatial axes, and Prewitt's operator is not appropriate for processing this type of image.
Year
DOI
Venue
2012
10.1016/j.eswa.2012.03.059
Expert Syst. Appl.
Keywords
Field
DocType
photographic image,discrete gradient operator,automatic detection,spatial x axis,point cloud,good performance,comparative analysis,spatial axis,spatial y axis,automatic determination,good result,vanishing point
Data mining,Topology,Roberts cross,Computer science,Algorithm,Sobel operator,Operator (computer programming),Point cloud,Prewitt operator,Vanishing point
Journal
Volume
Issue
ISSN
39
12
0957-4174
Citations 
PageRank 
References 
2
0.43
13
Authors
2
Name
Order
Citations
PageRank
José Ignacio Rojas-Sola153.24
Antonio Romero-Manchado240.85