Fast and Robust Traffic Sign Detection

IVVI: Intelligent vehicle based on visual information

“…There are two main colour spaces used: RGB [19] and HSI [20], although grey levels are also used [21]. As the sign's shape can have different appearances in the image some techniques has been used to speed up the algorithm like Genetic Algorithms [22], Hierarchical Models [13] or Normalized Correlation [23]. The proposed method, first detects the signs through normalized correlation of some models of circular and triangular signs in two images; one instance where the colour red (for warning and prohibition signs) and another where the colour grey, that is achromatic, has been enhanced for end-of-prohibition signs.…”

Methods for Ellipse Detection from Edge Maps of Real Images

“…Specifically, it is important that the structures that are elliptical are indeed detected and the structures that are non-elliptical are not detected as (Antonaros and Petrou, 2001;Belaroussi et al, 2005;Bell et al, 2006;Burrill et al, 1996;Chia et al, 2009;Dijkers et al, 2005;Fernandes, 2009;Feyaerts et al, 2001;Foresti, 2002;Foresti et al, 2005;Fu and Huang, 1995;He et al, 2009;Hua et al, 2007;Hwang et al, 2006;Iles et al, 2007;Ji et al, 1999;Kayikcioglu et al, 2000;Kumar et al, 2009;Kuno et al, 1991;Liu et al, 2007;Lu et al, 2005;Matson et al, 1970;O'Leary et al, 2005;Prasad 2011c;Rosin and West, 1992;Salas et al, 2006;Shen et al, 2009;Shih et al, 2008;Smereka and Glab, 2006;Soetedjo and Yamada, 2005;Sood et al, 2005;Takimoto et al, 2004;Tang et al, 2000;Wang et al, 2006;Wu and Wang, 1993;Yuasa et al, 2004;Zaim et al, 2006;Zhang et al, 2003;Zhou and Shen, 2003;Zhou et al, 2009) ellipses. However, the problem of detecting ellipses in real images is very challenging due to many reasons.…”

A hybrid method for ellipse detection in industrial images

“…For instance, ellipse detection can be used in surface inspection problems, camera calibration [3] , object segmentation [4] , eye gaze estimation [5] , road sign detection and classification [6] , and so on. Thus, it is particularly important to detect ellipse robustly and reliably from real images.…”