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We report a full-color meta-hologram based on a reflective metasurface. The reconstructed image of the meta-hologram is polarization-dependent with three primary colors, arranged in a plasmonic array in visible light region.
In this study, a novel split method was proposed to enlarge low resolution image. Instead of maintaining the grey levels of original pixels and estimating the grey levels for newly added pixels, the proposed approach split the original pixel, into new pixels. Two approaches are proposed to estimate grey levels for the new pixels, namely zero order split approach and 2nd order split approach. Degraded...
In this paper, we propose an enhanced authentication scheme that aims at the detection of stego-image preventing the fake share offers from the share-holder. Inspired by the past one study of Wang et al. scheme, the secret reconstruction is not complete in the course of shadow stego-images upon the secret sharing systems. Besides, the PSNR evaluations to the embedded images are furthermore superior...
Tagged magnetic resonance imaging (tagged MRI or tMRI) provides a means of directly and noninvasively displaying the internal motion of the myocardium. Reconstruction of the motion field is needed to quantify important clinical information, e.g., the myocardial strain, and detect regional heart functional loss. In this paper, we present a three-step method for this task. First, we use a Gabor filter...
We propose a novel framework to reconstruct the left ventricle (LV)'s 3D surface from sparse tagged-MRI (tMRI). First we acquire an initial surface mesh from a dense tMRI. Then landmarks are calculated both on contours of a specific new tMRI data and on corresponding slices of the initial mesh. Next, we employ several filters including global deformation, local deformation and remeshing to deform...
In this study, effects of image alignment error on vehicle license image reconstruction using the non-uniform interpolation method were studied. It is expected that the increase in measurement error will degrade the reconstructed image. Several image registration methods which were used to estimate the position and orientation differences between low resolution images are also tested. It was found...
We propose a novel meshless deformable model for in vivo cardiac left ventricle (LV) 3D motion estimation. As a relatively new technology, tagged MRI (tMRI) provides a direct and noninvasive way to reveal local deformation of the myocardium, which creates a large amount of heart motion data which requiring quantitative analysis. In our study, we sample the heart motion sparsely at intersections of...
In this paper, we describe a new approach for reconstructing 3D strains in the myocardium using tagged MR images. We first segment the myocardium using a 3D deformable model driven by image gradients and Gabor filter responses. Tags are automatically detected and tracked as deformable thin plates during systole and early diastole. To keep the tracking results more stable and consistent, we use a combination...
In this paper, we describe a new approach for reconstructing 3D strains in the myocardium using tagged MR images. We first segment the myocardium using a 3D deformable model driven by image gradients and Gabor filter responses. Tags are automatically detected and tracked as deformable thin plates during systole and early diastole. To keep the tracking results more stable and consistent, we use a combination...
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