THREE-DIMENSIONAL RECONSTRUCTION METHODS IN NEAR-FIELD CODED APERTURE FOR SPECT IMAGING SYSTEM

2013 ◽  
pp. 175-188
Author(s):  
Stephen Baoming Hong
Keyword(s):  
Imaging System ◽  
Near Field ◽  
Three Dimensional ◽  
Spect Imaging ◽  
Coded Aperture ◽  
Three Dimensional Reconstruction ◽  
Reconstruction Methods ◽  
Dimensional Reconstruction

scholarly journals Descriptive anatomy of the largest known specimen of Protoichthyosaurus prostaxalis (Reptilia: Ichthyosauria) including computed tomography and digital reconstruction of a three-dimensional skull

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6112 ◽  
Author(s):  
Dean R. Lomax ◽  
Laura B. Porro ◽  
Nigel R. Larkin
Keyword(s):  
Computed Tomography ◽  
Imaging Techniques ◽  
Three Dimensional ◽  
Lower Jurassic ◽  
Science Museum ◽  
Three Dimensional Reconstruction ◽  
Digital Reconstruction ◽  
Reconstruction Methods ◽  
Dimensional Reconstruction ◽  
Marine Reptile

Ichthyosaur fossils are abundant in Lower Jurassic sediments with nine genera found in the UK. In this paper, we describe the partial skeleton of a large ichthyosaur from the Lower Jurassic (lower Sinemurian) of Warwickshire, England, which was conserved and rearticulated to form the centrepiece of a new permanent gallery at the Thinktank, Birmingham Science Museum in 2015. The unusual three-dimensional preservation of the specimen permitted computed tomography (CT) scanning of individual braincase elements as well as the entire reassembled skull. This represents one of the first times that medical imaging and three-dimensional reconstruction methods have been applied to a large skull of a marine reptile. Data from these scans provide new anatomical information, such as the presence of branching vascular canals within the premaxilla and dentary, and an undescribed dorsal (quadrate) wing of the pterygoid hidden within matrix. Scanning also revealed areas of the skull that had been modelled in wood, clay and other materials after the specimen’s initial discovery, highlighting the utility of applying advanced imaging techniques to historical specimens. Additionally, the CT data served as the basis for a new three-dimensional reconstruction of the skull, in which minor damage was repaired and the preserved bones digitally rearticulated. Thus, for the first time a digital reconstruction of the skull and mandible of a large marine reptile skull is available. Museum records show the specimen was originally identified as an example of Ichthyosaurus communis but we identify this specimen as Protoichthyosaurus prostaxalis. The specimen features a skull nearly twice as long as any previously described specimen of P. prostaxalis, representing an individual with an estimated total body length between 3.2 and 4 m.

Radial stereo imaging system for three-dimensional reconstruction

Optik ◽  
2013 ◽  
Vol 124 (24) ◽  
pp. 6700-6706
Author(s):  
Chenglin Zuo ◽  
Yu Liu ◽  
Haifeng Li ◽  
Jin Liu ◽  
Maojun Zhang
Keyword(s):  
Imaging System ◽  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Stereo Imaging ◽  
Dimensional Reconstruction

Three-dimensional reconstruction of laser-irradiated targets using URA coded aperture cameras

1989 ◽  
Vol 71 (5) ◽  
pp. 249-255 ◽  
Author(s):  
Yen-Wei Chen ◽  
Manasobu Yamanaka ◽  
Noriaki Miyanaga ◽  
Tatsuhiko Yamanaka ◽  
Sadao Nakai ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Coded Aperture ◽  
Three Dimensional Reconstruction ◽  
Dimensional Reconstruction

A Fast and Smooth Carving Algorithm for Online 3D Reconstruction

2013 ◽  
Vol 311 ◽  
pp. 153-157
Author(s):  
Xing Gao ◽  
Ning Yu ◽  
Ming Hong Liao
Keyword(s):  
3D Reconstruction ◽  
Three Dimensional ◽  
Three Dimensional Reconstruction ◽  
Heritage Preservation ◽  
Reconstruction Methods ◽  
Space Carving ◽  
Dimensional Reconstruction ◽  
Bio Engineering ◽  
Current Reconstruction

Online rapid three-dimensional reconstruction is widely applied in virtual reality, heritage preservation, bio-engineering and architectural fields. The error caused by image quality or manual import is the main reason for the low quality of model details when applying current reconstruction methods while meeting the time premise. To solve this problem, the paper proposes a fast and smooth carving algorithm for online 3d reconstruction by joining the filter. By applying the method, you can get a more realistic and smooth three-dimensional reconstruction results. First, we convert the input point cloud to meshes through Delaunay tetrahedralisation. Then we reconstruct the model with the space carving algorithm with the filter to obtain the result. The experiment result shows our method exceeds existing methods while meeting the time constraints under the premise at the same time.

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