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Tubular Anisotropy Segmentation
[chapter]
2009
Lecture Notes in Computer Science
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Dans cet article, nous considérons le problème de la calibration géométrique dt'un projecteur vidéo à l'aide dt'un plan (mur) non marqué et dt'une caméra partiellement calibrés. Au lieu dt'utiliser des points de contrôle pour estimer lt'orientation mur-caméra, nous retrouvons cette relation en échantillonnant lt'hémisphère des orientations possibles. Ce processus est tellement rapide qut'il est même possible dt'intégrer lt'estimation de la focale de la caméra dans le processus
doi:10.1007/978-3-642-02256-2_2
fatcat:lnea2o537vfmdojpkh6gp4mhhq
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... . Notre méthode est simple et donne de bons résultats tel que démontré par nos expérimentations. Mots Clef Calibration de projecteurs, calibration par plans, estimation de focal, vision active. Abstract In this paper we address the problem of geometric video projector calibration using a markerless planar surface (wall) and a partially calibrated camera. Instead of using control points to infer the camera-wall orientation, we find such relation by efficiently sampling the hemisphere of possible orientations. This process is so fast that even the focal of the camera can be estimated during the sampling process. Hence, physical grids and full knowledge of camera parameters are no longer necessary to calibrate a video projector.
Tubular anisotropy for 2D vessel segmentation
2009
2009 IEEE Conference on Computer Vision and Pattern Recognition
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In this paper, we present a new approach for segmentation of tubular structures in 2D images providing minimal interaction. ...
We have chosen to exploit the tubular structure of the vessels one wants to extract to built an anisotropic metric giving higher speed on the center of the vessels and also when the minimal path tangent ...
Introduction In this paper we deal with the problem of finding a complete segmentation of tubular structures like vessels. ...
doi:10.1109/cvpr.2009.5206703
dblp:conf/cvpr/BenmansourCLC09
fatcat:4e5odurpfbfq7htqfbq2bbe4fm
Tubular anisotropy for 2D vessel segmentation
2009
2009 IEEE Conference on Computer Vision and Pattern Recognition
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In this paper, we present a new approach for segmentation of tubular structures in 2D images providing minimal interaction. ...
We have chosen to exploit the tubular structure of the vessels one wants to extract to built an anisotropic metric giving higher speed on the center of the vessels and also when the minimal path tangent ...
Introduction In this paper we deal with the problem of finding a complete segmentation of tubular structures like vessels. ...
doi:10.1109/cvprw.2009.5206703
fatcat:rak2tvsnonf57m4dj4k3fpwsnq
Minimal Paths for Tubular Structure Segmentation with Coherence Penalty and Adaptive Anisotropy
[article]
2018
arXiv
pre-print
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The minimal path method has proven to be particularly useful and efficient in tubular structure segmentation applications. ...
The features that characterize the appearance and anisotropy properties of a tubular structure are extracted through the associated orientation score. ...
For more models relevant to tubular structure segmentation, we refer to the complete reviews in [1] - [3] . ...
arXiv:1809.07987v3
fatcat:3p6454bgr5dhrc2dmy3w3d4c7q
A new interactive method for coronary arteries segmentation based on tubular anisotropy
2009
2009 IEEE International Symposium on Biomedical Imaging: From Nano to Macro
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We show results on two CT cardiac images for coronary arteries segmentation. ...
In this paper we present a new interactive method for tubular structure extraction. The main application and motivation for this work is vessel tracking in 3D medical images. ...
First two images : RCA segmentation using the tubular anisotropy approach shown on the whole image and on the selected sub-volume. ...
doi:10.1109/isbi.2009.5192978
dblp:conf/isbi/BenmansourC09
fatcat:b5rx4jmelnfvtfxmr3b4swqfsy
Susceptibility tensor imaging of the kidney and its microstructural underpinnings
2014
Magnetic Resonance in Medicine
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Confocal microscopy was used to identify which tubular segments of the nephron were detected by DTI and STI. Results-Diffusion anisotropy was limited to the inner medulla of the kidney. ...
DTI did not find a significant number of coherent tubular tracks in the outer medulla or cortex. ...
We identified the tubular segments of the mouse nephron from confocal images of the same kidney used for MRI. ...
doi:10.1002/mrm.25219
pmid:24700637
pmcid:PMC4183741
fatcat:khc3wxh2lvgo3mep2yxkulcota
Simultaneous measurements of ionic currents, tension and optical properties of voltage clamped skeletal muscle fibres
1988
General Physiology and Biophysics
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of the tubular mouth and lumen. ...
The tension of the terminal segment of the fibre in the test compartment was measured isometrically. ...
pmid:2456248
fatcat:j2nck2ryzjbnldl7ficrsunlde
Tubular Structure Segmentation Based on Minimal Path Method and Anisotropic Enhancement
2010
International Journal of Computer Vision
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We have chosen to exploit the tubular structure of the vessels one wants to extract to built an anisotropic metric. ...
We present a new interactive method for tubular structure extraction. The main application and motivation for this work is vessel tracking in 2D and 3D images. ...
Fig. 17 17 First line : RCA segmentation using the tubular anisotropy approach shown on the whole image and on the selected sub-volume. ...
doi:10.1007/s11263-010-0331-0
fatcat:p3rbxglsvjhapai36ckfm2adnm
MRI tools for assessment of microstructure and nephron function of the kidney
2016
AJP - Renal Physiology
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Quantitative MRI can assess local tubular function and is able to determine the concentrating mechanism of the kidney noninvasively in real time. ...
Consequently, the presence of diffusion anisotropy and performance of DTI tractography indicate that the tubular segments are mostly intact. ...
It treats nephron segments along the tubule as being distinct where tubular vectors are not projected or shared. ...
doi:10.1152/ajprenal.00134.2016
pmid:27630064
pmcid:PMC5210196
fatcat:ul67eb4whngmnbouzkipnwtqzu
ATP-Driven Exchange of Histone H2AZ Variant Catalyzed by SWR1 Chromatin Remodeling Complex
2004
Science
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Inferences on Flow at the Base of Earth's Mantle Based on Seismic Anisotropy Mark Panning* and Barbara Romanowicz We applied global waveform tomography to model radial anisotropy in the whole mantle. ...
The bright segments are gold, and the dark domains are polypyrrole, corresponding to the diagram in the upper right inset. ...
doi:10.1126/science.1090701
pmid:14645854
fatcat:hed5g5x6cbfhtlufy5oexnaj34
Self-Assembly of Mesoscopic Metal-Polymer Amphiphiles
2004
Science
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Inferences on Flow at the Base of Earth's Mantle Based on Seismic Anisotropy Mark Panning* and Barbara Romanowicz We applied global waveform tomography to model radial anisotropy in the whole mantle. ...
The bright segments are gold, and the dark domains are polypyrrole, corresponding to the diagram in the upper right inset. ...
doi:10.1126/science.1093276
pmid:14726585
fatcat:wafaqywkjneffmn3s4zi7iggcq
Magnetic phase diagrams of barcode-type nanostructures
2009
Nanotechnology
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2010 pre-print arXiv:1010.2258v1 fatcat:7hx5e2cw45bljdcvh2gtn4fr64
In order to calculate the interaction energy between the ferromagnetic segments, we first need to calculate the magnetostatic potential U (r) of a single tubular structure. ...
In order to calculate the interaction energy between the ferromagnetic segments, we first need to calculate the magnetostatic potential U (r) of a single tubular structure. ...
doi:10.1088/0957-4484/20/38/385703
pmid:19713575
fatcat:kkbeww6ecvc5hkkg5uwlqavnfa
Detecting tubular structures via direct vector field singularity characterization
2010
2010 Annual International Conference of the IEEE Engineering in Medicine and Biology
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The initial step of vessel segmentation in 3D is the detection of vessel centerlines. ...
In this paper we propose a 3D tubular structure detection method that removes these two drawbacks. ...
Segmentation of tubular structures is composed of two major components: Centerline detection and surface segmentation. ...
doi:10.1109/iembs.2010.5628028
pmid:21097293
fatcat:7k4pfvqssbgf3e7kcr4slyhewa
Principal curves to extract vessels in 3D angiograms
2008
2008 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops
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Results show that it has high robustness to variation in image resolution, voxel anisotropy and noise. ...
Segmentation of blood vessels and extraction of their centerlines in 3D angiography are essential to diagnosis and prognosis of vascular diseases, and advanced image processing and analysis. ...
tubular structure and P i (x) is a similar function but with the segment projection set S replaced by a vertex projection set V. ...
doi:10.1109/cvprw.2008.4563015
dblp:conf/cvpr/WongC08
fatcat:dizhemy4izbodfyrzoewrzlnsm
Image contrast using the secondary and tertiary eigenvectors in diffusion tensor imaging
2006
Magnetic Resonance in Medicine
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Their usefulness in studying cellular events during brain development and tissue segmentation is assessed. ...
Various anisotropy indices have been proposed to measure anisotropy of water diffusion, and V 1 has been used to reconstruct white matter structures. ...
Their usefulness in studying cellular events during brain development and tissue segmentation is assessed. ...
doi:10.1002/mrm.20767
pmid:16402380
fatcat:recd73doc5fehdrucucrcppktm
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