In addition, novel linear constraints are exploited that enable geometric ambiguity reduction between the rectification of the imaged pattern and the real-world pattern. The remaining ambiguity is within a similarity if the scene plane contains repeated elements that are rotated differently, or within a similarity with a scale ambiguity along the axis of symmetry if any of the elements are reflected. The method is successfully tested on a broad range of image types including those where state-of-the-art methods fail.
Joint work with Ondra Chum and Jiri Matas