Registration of images with affine geometric distortion by means of moment invariants
Jan Flusser, Stanislav Saic, Tomáš Suk · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1994
This paper deals with the registration of images with affine geometric distortion. It describes a new method for automatic control point selection and matching. First, reference and sensed images are segmented and closed-boundary regions are extracted. Each region is represented by a set of affine-invariant moment-based features. Correspondence between the regions is then established by a two-stage matching algorithm that works both in the feature space and in the image space. Centers of gravity of corresponding regions are used as control points. A practical use of the proposed method is demonstrated by registration of SPOT and Landsat TM images. It is shown that our method can produce subpixel registration accuracy.