Within this paper a highly flexible approach for audio and visual attention modeling is presented. The developed system aims to be widely adaptable for different application scenarios within multimedia processing and ...
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Within this paper a highly flexible approach for audio and visual attention modeling is presented. The developed system aims to be widely adaptable for different application scenarios within multimedia processing and coding. Possible use cases are presented and their influence on the system concept is shown. Furthermore the development of an attention model within the EU-funded research project dIOMEdES is described. This project focuses on developing a system for hybriddelivery of 3d stereoscopic and multi-view content to the homes through multiple transmission paths. The attention model, which is based on the framework presented, is used to enhance the content encoding process. This publication gives an overview over system design aspects as well as algorithms used for attention modeling.
The main motivation of this project is to derive and present an integrated cardiac model, based on information obtained using two different imaging modalities: 3d echocardiography (3d echo) and cardiac magnetic resona...
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The main motivation of this project is to derive and present an integrated cardiac model, based on information obtained using two different imaging modalities: 3d echocardiography (3d echo) and cardiac magnetic resonance imaging (CMR). Since 3d echo allows for volumetric and functional measurements in real-time, while CMR can produce anatomically accurate recordings of morphology and function (cine imaging), perfusion (first-pass imaging) and tissue characterization (such as edema (T2 STIR) or scar (late enhancement imaging)), combining them should benefit myocardial viability assessment and ischemia diagnosis. Results: The computed left ventricular regional parameters show a significant difference between normal anddysfunctional regions. Average contour deformation errors for CMR data are in the range of inter-observer variability. A good visual alignment between 3d echo and CMR data was achievable for all cases. Conclusion: Combining multi-modal anatomical and functional information allows for a quick visual assessment of datasets obtained the same day or during longitudinal studies. Current work includes further integration of 3d echo and CMR data and possibly of other imaging modalities (e.g. CT).
We develop a 3d Ultrasound Computer Tomograph (3d USCT) for early breast cancer detection. It is capable of transmission and reflection imaging. transmission tomography provides speed of sound as well as attenuation i...
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ISBN:
(纸本)9781457712531
We develop a 3d Ultrasound Computer Tomograph (3d USCT) for early breast cancer detection. It is capable of transmission and reflection imaging. transmission tomography provides speed of sound as well as attenuation images and serves as accurate background medium estimation for reflection tomography. We use Algebraic Reconstruction Technique (ART) algorithms for transmission tomography. The main algorithmic step in ART algorithms is the solution of a large system of equations. There are serveral solvers available, however erroneous and noisy data pose problems for the solving process. Our goal is to include apriori knowledge in the reconstruction to obtain better image quality and less artifacts due to noise. By including transducer directivity, domain-specific interpolation and other apriori information we improved the reconstruction images anddecreased noise artifacts. We show exemplary speed of sound reconstructions of a breast phantom.
The following topics were dealt with: urban modeling; 3d navigation; geometric modelling; visual hulls; 3d coding andtransmission; 3d retrieval; multiple view reconstruction; and large scale models and view planning.
The following topics were dealt with: urban modeling; 3d navigation; geometric modelling; visual hulls; 3d coding andtransmission; 3d retrieval; multiple view reconstruction; and large scale models and view planning.
Copyright and Reprint Permissions: Abstracting is permitted with credit to the source. Libraries may photocopy beyond the limits of US copyright law, for private use of patrons, those articles in this volume that carr...
Copyright and Reprint Permissions: Abstracting is permitted with credit to the source. Libraries may photocopy beyond the limits of US copyright law, for private use of patrons, those articles in this volume that carry a code at the bottom of the first page, provided that the per-copy fee indicated in the code is paid through the Copyright Clearance Center. The papers in this book comprise the proceedings of the meeting mentioned on the cover and title page. They reflect the authors' opinions and, in the interests of timely dissemination, are published as presented and without change. Their inclusion in this publication does not necessarily constitute endorsement by the editors or the Institute of Electrical and Electronics Engineers, Inc.
The Case whole mouse cryo-imaging system is a section-and-image system which provides microscopic, information rich, whole mouse color brightfield and molecular fluorescence images of an entire mouse. Cryo-imaging cre...
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The Case whole mouse cryo-imaging system is a section-and-image system which provides microscopic, information rich, whole mouse color brightfield and molecular fluorescence images of an entire mouse. Cryo-imaging creates extremely large data sets (>;70GB color bright-field) and presents a multitude of instrumentation and image processing/visualization challenges. Precise mechanical control was required to move a 50 lb microscope payload for tiled acquisitions. Multiple image preprocessing steps were developed, including illumination correction, tiling, alignment, stitching, and subsurface fluorescence removal. We created interactive, multi-scale 3dvisualization specially suited for cryo-image data which allowed one to visualize an entire mouse on the screen and zoom to progressively greater resolution. Organ segmentation, stem cell detection, and registration are all provided. Cryo-imaging addresses needs in a very large number of biomedical technology applications including mouse and embryo phenotyping, drug delivery, imaging agents, cancer, and stem cells. Cryo-imaging fills the gap between whole animal in vivo imaging and histology, allowing one to image a mouse along the continuum mouse → organ → tissue structure → cell → molecule. In this overview, we describe this unique imaging technology and a variety of exciting applications.
This study focuses on two problems in 3dvisualization application for heritage site research. Firstly, methods for large scale terrain modeling and rendering were presented. Complex virtual environments were construc...
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ISBN:
(纸本)9780819483645
This study focuses on two problems in 3dvisualization application for heritage site research. Firstly, methods for large scale terrain modeling and rendering were presented. Complex virtual environments were constructed with sequences of remote sensing images anddEM data. The algorithm of precise 3d scenes modeling was optimized. At the same time, the spatial index of quadtree and the images cache management strategies were introduced for improving the performance of interactive 3dvisualization system. A novel method creating a mapping between 3d models and the image textures were put forward, so that the models and the textures can be managed respectively. As a result, the capacity of massive 3d terrain surface models management was enhanced as well as the real-time rendering was accelerated. Secondly, methods for 3d culture relics modeling were presented. The culture relics and ancient buildings of the Canal were simulated, which will contribute to its reconstruction and protection. Some ancient water facilities such as ship-lock anddocks models and animated navigation scenes were created based on the construction principle and architecture of the Canal transport hub.
Vast amounts of multimodal imaging data are continuously generated in medicine. 3d and3d stereoscopic visualization have become indispensable methods for health care professionals to effectively analyze and communica...
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Advances in imaging techniques lead to nondestructive 3dvisualization of biological tissue at a sub-cellular scale. As a consequence, new demands emerge to segment complex structures. For instance, synchrotron radiat...
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ISBN:
(纸本)9781424441266
Advances in imaging techniques lead to nondestructive 3dvisualization of biological tissue at a sub-cellular scale. As a consequence, new demands emerge to segment complex structures. For instance, synchrotron radiation micro-CT, makes it possible to image the lacunar-canalicular porosity in bone tissue. This structure contains a dense network of slender channels interconnecting the cells. Their size (similar to 300-600 nanometers in diameter) is at the limit of the acquisition system resolution (280nm) making their detection difficult. In this work is proposed a variational region growing segmentation method adapted for cellular networks. To control the evolution of the segmentation through tubular structures a vesselness map is introduced in the expression of the functional to minimize. The method is tested on synthetic images and applied to experimental data.
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