نتایج جستجو برای: 3d reconstruction

تعداد نتایج: 297728  

2001
Hynek Bakstein

This thesis proposal deals with a 3D reconstruction from noncentral cameras. An introduction to the 3D reconstruction in general is given, together with the definition of non-central cameras and their comparison with central cameras. State-of-the-art in the field of the non-central cameras is presented. Our previous contribution in this area is described and thesis goals are formulated.

2001
Eric Bardinet Alan C. F. Colchester Alexis Roche Yonggen Zhu Yang He Sébastien Ourselin Bill Nailon S. Ali Hojjat James Ironside Safa Al-Sarraj Nicholas Ayache Joanna M. Wardlaw

We present a method for registration of macroscopic optical images with MR images of the same patient. This forms a key part of a series of procedures to allow post mortem findings to be accurately registered with MR images, and more generally provides a method for 3D mapping of the distribution of pathological changes throughout the brain. The first stage of the method involves a 3D reconstruc...

Journal: :journal of biomedical physics and engineering 0
d arefan a talebpour n ahmadinejhad a kamali asl

normal 0 false false false en-us x-none ar-sa digital breast tomosynthesis (dbt) is a technology that creates three dimensional (3d) images of breast tissue. tomosynthesis mammography detects lesions that are not detectable with other imaging systems. if image reconstruction time is in the order of seconds, we can use tomosynthesis systems to perform tomosynthesis-guided interventional procedur...

Introduction: While the necessity of replacing voxels with blobs in conventional tomographic reconstruction based upon line-integrals is clear, it is not however well-investigated in plane- integral-based reconstruction. The problem is more challenging in convergent-plane projection reconstruction. In this work, we are aiming at utilizing blobs as alternative to voxels. <stron...

2004
Armin Gruen Fabio Remondino Li Zhang

In this paper we present the modeling and visualization of the cultural heritage area of Bamiyan, Afghanistan. The region is situated ca 200 km north-west of Kabul and it was one of the major Buddhist centres until the ninth century AD. The two standing Buddhas belonged to some of the most famous Buddhist monuments world-wide. In 2001 they were destroyed through an act of vandalism by the Taleb...

2002
Marta Wilczkowiak Edmond Boyer Peter F. Sturm

In this paper, efficient and generic tools for calibration and 3D reconstruction are presented. These tools exploit geometric constraints frequently present in man-made environments and allow camera calibration as well as scene structure to be estimated with a small amount of user interactions and little a priori knowledge. The proposed approach is based on primitives that naturally characteriz...

2001
José Gaspar Etienne Grossmann José Santos-Victor

We propose a method for 3D reconstruction of structured environments from a single omnidirectional image. It is based on a reduced amount of user information, in the form of 2D pixel coordinates, alignment and coplanarity properties amongst subsets of the corresponding 3D points. Just a few panoramic images are sufficient for building the 3D model, as opposed to a larger number of “normal” imag...

2007
Cheng-Yuan Tang Yi-Leh Wu Pei-Ching Hu Hsien-Chang Lin Wen-Chao Chen

In this paper, our goal is to reconstruct metric 3D models for large structures (or other 3D objects) from uncalibrated images. The internal camera parameters are estimated by using homographic constraints. More specifically, we propose to use straight lines and vanishing points to compute the infinite homography. However, because vanishing points are very sensitive to noise, we propose further...

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