The Hough transformation of rectangle
Nebojša Ralević, Slobodan Dražić, Radovan Obradović · 2008
Hough transformation for finding straight line segments is well known in digital image processing. In this paper we have used hough, houghline and houghpeaks functions for creating a new 4— dimensional parameter space named h_space for extracting rectangles in digital image. These parameters are coordinates of the center of a rectangle (intersection of diagonals), angle that the shorter edge makes with x-axis and length of the longer edge. In our opinion this result might be useful for the shape descriptors associated with rectangles because the parameters of h-space are suitable for calculating descriptors of a rectangle (like area and perimeter) and they give a good idea about the position of a rectangle.