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This paper presents an efficient method of subpixel image registration based on the phase-only correlations (POCs) of image projections. Conventional POC-based methods need the two-dimensional discrete Fourier transforms three-times for calculating the 2-D POC of images. In order to reduce the computational cost caused by the two-dimensional discrete Fourier transforms, we decompose the two-dimensional...
This paper presents a new realization method of variable low-pass infinite impulse response (IIR) digital filters with high tuning accuracy. We construct the proposed variable filters by using the state-space-based frequency transformation proposed by Mullis and Roberts. Since this transformation requires an inverse matrix that leads to high computational cost, we present a new simple algorithm that...
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