Approach to detect arbitrary triangles in image

Abstract

A new algorithm was proposed for triangles detection based on windowed Hough transform.A sliding window,of which the center point was regarded as the original point in plane coordinates,was used to compute the Hough transform of the small regions of the image.Peaks of the Hough image corresponding to the line segments were then extracted.A triangle was detected when the three lines satisfied the certain conditions.The experimental results prove that the arbitrary triangles can be efficiently detected.Right-angled triangle,isosceles triangle and equilateral triangle also can be detected if the conditions are changed.Another application of the algorithm is to retrieve triangles from the image.