An Effective Approach for Multi-Rectangle Detection

For multi-rectangle detection, this paper proposes a new approach using restricted group Hough transform (RGHT) and rectangle's properties. Every image pixel is grouped and used RGHT firstly. Then the Hough peaks are extracted and used to find possible rectangles. And the possible rectangles are affirmed true by mechanism of evidence collection at last. Numerical experiments demonstrate that this approach has better performance compared with other existing algorithms.