Algorithms for subpixel registration
Computer Vision, Graphics, and Image Processing
Discrete-time signal processing (2nd ed.)
Discrete-time signal processing (2nd ed.)
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 2 - Volume 02
Machine Vision and Applications
Extension of phase correlation to subpixel registration
IEEE Transactions on Image Processing
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Phase correlation based template matching is an efficient tool for translation estimation which is in turn required for the image registration and the object tracking applications. When a template of an object is phase correlated with the search image, the resulting correlation surface is supposed to contain a sharp peak corresponding to the location of the object in the search image. However, the resulting surface also contains various falsepeaks which are sometimes higherin magnitude than the truepeak. In order to solve the problem, we present an efficient and effective preprocessing technique that extends the images with new pixels having decaying values. The technique is compared with two recent methods on cluttered, noisy, blurred, and slightly rotated scenes. The results show that the proposed method outperforms both of them, especially when the object is away from the central region in the image.