Noise robust image edge detection based upon the automatic anisotropic Gaussian kernels. (March 2017)

• Record Type: Journal Article
• Authors: Zhang, WeiChuan; Zhao, YaLi; Breckon, Toby P.; Chen, Long
• Is Part Of: Pattern recognition. Volume 63(2017:Mar.)
• Page Start: 193
• Page End: 205
• Publication Date: 2017-03
• Subjects: Automatic anisotropic Gaussian kernels -- Anisotropic directional derivatives (ANDDs) -- Edge detection -- Canny detector; Pattern perception -- Periodicals; Perception des structures -- Périodiques; Patroonherkenning; 006.4
• DOI: 10.1016/j.patcog.2016.10.008
• Languages: English
• ISSNs: 0031-3203

Abstract

Abstract: This paper presents a novel noise robust edge detector based upon the automatic anisotropic Gaussian kernels (ANGKs), which also addresses the current problem that the seminal Canny edge detector may miss some obvious crossing edge details. Firstly, automatic ANGKs are designed according to the noise suppression, edge resolution and localization precision, which also conciliate the conflict between them. Secondly, reasons why cross-edge points are missing from Canny detector results using isotropic Gaussian kernel are analyzed. Thirdly, the automatic ANGKs are used to smooth image and a revised edge extraction method is used to extract edges. Finally, the aggregate test receiver-operating-characteristic (ROC) curves and Pratt's Figure of Merit (FOM) are used to evaluate the proposed detector against state-of-the-art edge detectors. The experiment results show that the proposed algorithm can obtain better performance for noise-free and noisy images. Highlights: The reasons why some obvious edge miss detected in Canny detector are analyzed thoroughly. The automatic anisotropic Gaussian kernels are designed and a revised edge extraction is proposed. A noise robust edge detector with excellent performance is presented.