Results 101 to 110 of about 1,476 (141)
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Cubical homology and the topological classification of 2D and 3D imagery
Proceedings 2001 International Conference on Image Processing (Cat. No.01CH37205), 2002There are a number of tasks in low level vision and image processing that involve computing certain topological characteristics of objects in a given image including connectivity and the number of holes. We combine a new combinatorial topology method to compute the number of connected components and holes of objects in a given image with fast ...
Madjid Allili +2 more
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Volume Rendering of 3D-Tomographic Imagery
1988Radiological examinations are increasingly based on sequences of cross-sectional images. In current clinical applications, the three-dimensional (3D) relationships contained in these examinations must be inferred by the observer through analysis of multiple two-dimensional (2D) images. In this paper, methods for the direct display of 3D gray level data
K. H. Hohne +3 more
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Bone fragment segmentation from 3D CT imagery
Computerized Medical Imaging and Graphics, 2018This paper presents a novel method to segment bone fragments imaged using 3D Computed Tomography (CT). Existing image segmentation solutions often lack accuracy when segmenting internal trabecular and cancellous bone tissues from adjacent soft tissues having similar appearance and often merge regions associated with distinct fragments.
Waseem G. Shadid, Andrew R. Willis
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Recovering 3D information from complex aerial imagery
[1990] Proceedings. 10th International Conference on Pattern Recognition, 2002The authors describe a comprehensive stereo analysis system developed to recover the 3D description of an urban area using high-resolution aerial imagery. Given an area of interest in terms of geographic coverage, the system can automatically find the appropriate stereo pair using a spatial database, select control points to register the two images so ...
Yuan C. Hsieh +2 more
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Improvements to 3D-Tarp Coding for the Compression of Hyperspectral Imagery
IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008In this paper, we propose several improvements to the 3D-tarp coder for the lossy compression of hyperspectral imagery. Specific ameliorations include use of principal component analysis instead of a wavelet transform for spectral decorrelation, use of the quincunx wavelet transform instead of the traditional dyadic decomposition in the spatial ...
Jing Zhang +3 more
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Minimal Solvers for 3D Geometry from Satellite Imagery
2015 IEEE International Conference on Computer Vision (ICCV), 2015We propose two novel minimal solvers which advance the state of the art in satellite imagery processing. Our methods are efficient and do not rely on the prior existence of complex inverse mapping functions to correlate 2D image coordinates and 3D terrain.
Enliang Zheng +3 more
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Memory and processing architecture for 3D voxel-based imagery
IEEE Computer Graphics and Applications, 1988A versatile voxel-based architecture for 3-D volume visualization, called the Cube architecture, is introduced. A small-scale prototype of the architecture has been realized in hardware and has been operating in true real-time, faster than the alternative voxel systems.
Arie E. Kaufman, Reuven Bakalash
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3D model based vehicle classification in aerial imagery
2010 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2010We present an approach that uses detailed 3D models to detect and classify objects into fine levels of vehicle categories. Unlike other approaches that use silhouette information to fit a 3D model, our approach uses complete appearance from the image. Each 3D model has a set of salient location markers that are determined a-priori.
Saad M. Khan +3 more
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Multiframe fusion of undersampled 3D imagery
SPIE Proceedings, 20123D imaging LADAR Avalanche Photo-Diode (APD) arrays are emerging as an important technology for future generation remote sensing and reconnaissance systems. One important limiting factor in their development is the pixel pitch, which is typically 100 micrometers.
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3D Modelling of Medical Imagery
1991For the efficient use of radiological data a representation is needed to structure different kinds of information derived from imaging devices or generated during diagnosis and therapy. Early representations mostly focused on the description of geometric properties of anatomical objects from imaging devices such as x-ray CT or MRI. Additional knowledge,
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