Abstract
A new registration algorithm based on pseudo-log-polar Fourier transform
(PLPFT) for estimating large translations, rotations, and scalings
in images is developed. The PLPFT, which is calculated at points
distributed at nonlinear increased concentric squares, approximates
log-polar Fourier representations of images accurately. In addition,
it can be calculated quickly by utilizing the Fourier separability
property and the fractional fast Fourier transform. Using the log-polar
Fourier representations and cross-power spectrum method, we can estimate
the rotations and scalings in images and obtain translations later.
Experimental results have verified the robustness and high accuracy
of this algorithm.
- algorithm,
- approximation
- approximation,
- concentric
- cross-power
- estimation
- estimation,
- fast
- fourier
- fractional
- image
- method,
- nonlinear
- plpft,
- pseudo-log-polar
- registration
- registration,
- representation
- representation,
- rotation
- scaling
- spectrum
- square,
- theory,
- transform,
- transforms,
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