Abstract This paper enhances the voxel-to-voxel radiance shooting, propagation, and scattering algorithm of Max [20]. It reduces memory requirements by storing only on occupied cells a sparse voxel octree sampling 24 propagation direction bins instead 96 or more. gives modification to compensate for larger solid angle allows position-dependent fully anisotropic scattering. For volume $$n^3$$ <m...

This thesis investigates a memory-efficient representation of highly detailed geometry in 3D voxel grids. The memory consumption of a plain dense grid scales too fast as the resolution increases to be feasible at very high resolutions. In computer graphics, the geometry is often surface geometry, and representing the data in a sparse voxel octree exploits the sparsity, making the memory consump...

3D LiDAR has become an indispensable sensor in autonomous driving vehicles. In LiDAR-based point cloud semantic segmentation, most voxel-based segmentors cannot efficiently capture large amounts of context information, resulting limited receptive fields and limiting their performance. To address this problem, a sparse attention network is introduced for termed SVASeg, which captures information...

Introduction: The concept of one-voxel-one-coil(OVOC) acquisition has been introduced as an extreme realization of parallel imaging where spatial information is predominantly encoded through the sensitive volumes of multiple small coils. In implementations as MR-encephalography(MREG) or Inverse Imaging (InI) this allows very rapid examination of functional activation (1,2). The signal time cour...

Voxel coloring is one of the well-known methods for reconstructing a 3D shape from 2D images. The conventional methods cause a trade-off problem between precision and stability, when they reconstruct 3D shapes. In this paper, we present a novel approach to solve the trade-off problems. This method searches the real surface voxel on comparing the photo-consistency of an inside voxel on the optic...

AIM To examine the influence of the field of view (FOV) and voxel size on the measurement of the volume of simulated internal root resorption (IRR) lesions through cone-beam computed tomography (CBCT). METHODOLOGY Eleven single-rooted teeth with IRR simulated by acid demineralization were studied. CBCT images were acquired using large FOV (voxel sizes of 0.200, 0.250 and 0.300 mm) and limited...

We present a new model for fanning and bending white matter structures on a sub-voxel scale. We devise a parametric model of how the fibre orientation varies spatially over each sub-voxel in the voxel grid for both types of configuration. Fitting the model provides quantitative information about the degree of fanning or bending in each voxel. We demonstrate using data from a standard human brai...