SUBPIXEL IMAGE REGISTRATION USING CIRCULAR FIDUCIALS
Alon Efrat, Craig Gotsman · International Journal of Computational Geometry & Applications · 1994
The design of fiducials for precise image registration is of major practical importance in computer vision, especially in automatic inspection applications. We analyze the sub-pixel registration accuracy that can, and cannot, be achieved by some rotation-invariant fiducials, and present and analyze efficient algorithms for the registration procedure. We rely on some old and new results from lattice geometry and number theory and efficient computational-geometric methods.