Results 261 to 270 of about 330,202 (308)
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Efficient alignment of fingerprint images
Object recognition supported by user interaction for service robots, 2003Fingerprint matching is a common technique for biometric authentication. Solid state sensors for fingerprint recognition are used in small sized embedded systems. The size of these sensors makes it necessary to store several impressions of the same finger.
Herbert Ramoser +2 more
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Multisensor alignment of image manifolds
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013The access to many sources of satellite information is nowadays a reality. However, few methods allow to consider simultaneously data coming from different sensors, due to the differences in numbers of bands, spatial resolution and changes in the acquisition conditions.
Devis Tuia +2 more
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Imaging and Alignment for Image-Guided Radiation Therapy
Journal of Clinical Oncology, 2007Image-guided radiation therapy is an exciting new area that focuses heavily on the potential benefit of advanced imaging and image registration to improve precision, thus limiting morbidity and potentially allowing for safe delivery of increased dose.
James M, Balter, Marc L, Kessler
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Image alignment for 3D reconstruction in a SEM
Microelectronics Reliability, 2005In a previous paper [1] a procedure to extract the third dimension from back-scattered electron has been proposed. The 3D recovery process involves the acquisition of four images and the computation of surface gradients; thus, a specific algorithm finds the depth map of the given surface.
Pintus R, PODDA, SIMONA, VANZI, MASSIMO
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Lighting Alignment for Image Sequences
2015Lighting is one of the challenges for image processing. Even though some algorithms are proposed to deal with the lighting variation for images, most of them are designed for a single image but not for image sequences. In fact, the correlation between frames can provide useful information to remove the illumination diversity, which is not available for
Xiaoyue Jiang +3 more
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Field‐aligned Quadrangulation for Image Vectorization
Computer Graphics Forum, 2019AbstractImage vectorization is an important yet challenging problem, especially when the input image has rich content. In this paper, we develop a novel method for automatically vectorizing natural images with feature‐aligned quad‐dominant meshes. Inspired by the quadrangulation methods in 3D geometry processing, we propose a new directional field ...
Guangshun Wei +5 more
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Automatic alignment of radionuclide images
Physics in Medicine & Biology, 1982The variability of the position, dimensions and orientation of a radionuclide image within the field of view of a gamma camera hampers attempts to analyse the image numerically. A method is described for using a set of training images of a particular type, in this case right lateral brain images, to define the likely variations in the position ...
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Image registration by aligning entropies
Proceedings of the 2001 IEEE Computer Society Conference on Computer Vision and Pattern Recognition. CVPR 2001, 2005Maximization of mutual information is a powerful method for registering images (and other data) captured with different sensors or under varying conditions, since the technique is robust to variations in the image formation process. On the other hand, the high level of robustness allows false positives when matching over a large search space and also ...
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Estimating alignment errors in sets of images
2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano (IEEE Cat No. 04EX821), 2005We describe a robust and accurate method for the estimation of alignment errors for sets of two-dimensional images, in the case where the true pattern is unknown. The intended application of the proposed method is cryoelectron microscopy, where two-dimensional views of individual proteins are observed in the electron microscope in random orientations ...
Philip Baldwin, Pawel Penczek
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Borehole image correspondence and automated alignment
2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2017Borehole images are often misaligned due to a depth offset in the acquisition sensors of a wireline tool. We propose an algorithm that identifies matching feature points and aligns the image. One of the main challenges is that imaging pads have no azimuthal overlap.
Andriy Gelman +4 more
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