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We propose in this paper a robust multi-resolution technique to estimate dense velocity field from image sequences. It couples a Gaussian pyramidal down-sampling decomposition together with a multi-grid approach. At each pyramid level, bilinear interpolation and efficient warping techniques are performed to generate a residual images. The displacement field is computed in a Markov random field (MRF)...
The recent development of pixellated solid-state detectors for SPECT provides new opportunities for better image quality when the impact of energy resolution, spatial response and reconstruction technique is combined. In this investigation we assess the image quality of cadmium zinc telluride (CZT) based solid-state detector SPECT systems by use of Monte Carlo simulation, implemented in GEANT 4. Images...
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