Scoliosis causes deformations such as twisting and lateral bending of the spine. To correct scoliotic deformation, the extents of 3D spinal deformation need to be measured. This paper studies the modeling and measurement of scoliotic spine based on 3D curve model. Through modeling the spine as a 3D Cosserat rod, the 3D structure of a scoliotic spine can be recovered by obtaining the minimum pot...

In this work, a new affine invariant of parallelograms is introduced, and the explicit constraint equations between the intrinsic matrix of a camera and the similar invariants of a parallelogram or a parallelepiped are established using this affine invariant. Camera calibration and 3D reconstruction from parallelograms are systematically studied based on these constraints. The proposed theoreti...

Occlusion and inferior foreground/background segmentation still poses a big problem to 3D reconstruction from a set of images in a multi-camera system because it has a destructive nature on the reconstruction if one or more of the cameras do not see the object properly. We propose a method to obtain a 3D reconstruction which takes into account the possibility of occlusion by combining the infor...

In this work, we proposes a simple yet effective method for improving performance of local feature matching among equirectangular cylindrical images, which brings more stable and complete 3D reconstruction by incremental SfM. The key idea is to exiplictly generate synthesized images by rotating the spherical panoramic images and to detect and describe features only from the less distroted area ...

Good correspondences are a key to a correct 3D reconstruction of a scene, especially in the presence of multiple independent objects. In this paper a novel segmentation algorithm is presented that decouples the outlier rejection from the object segmentation. It is shown that the proposed outlier rejection scheme provides a dense set of correspondences across the image and eliminates gross outli...

Textures often result from complicated surface geometries. We propose a method that extracts such geometry from raw BTF data. Exploiting the huge amount of input data, only a few and rather weak assumptions about reflectance and geometry suffice. A key element of our approach are viewpoint robustness of reflectance features. We propose a few and compare them for 3D reconstruction.

A number of promising applications have renewed researchers’ interest in the analysis of human movements. In general, motion capture could play an important role in many areas that require storing, analyzing, or reproducing the motion of human beings. Current motion capture techniques are based on intrusive sensory systems, which might be disturbing or impossible to apply in several application...

Currently there are little objective parameters that can quantify the success of one form of prostate surgical removal over another. Accordingly, at Old Dominion University (ODU) we have been developing a process resulting in the use of software algorithms to assess the coverage and depth of extra-capsular soft tissue removed with the prostate by the various surgical approaches. Parameters such...

Recording consistent multiview image data for 3D reconstruction is a challenging task, especially with low cost cameras. We propose a mobile setup of circularly arranged cameras for recording a rotational image sequence around the subject. It provides calibration of the cameras with a novel, multi-functional calibration target as well as software color adaption. The output of the calibrated cam...