Patent application number | Description | Published |
20090102842 | CLIPPING GEOMETRIES IN RAY-CASTING - A computer implemented method for creating a depth range buffer for supporting clipping geometries for ray-casting includes inputting image data, establishing a depth range buffer for specifying a start and an end point of each ray, computing a near depth of the image data corresponding to the start point of each ray, computing a far depth of the image data corresponding to the end point of each ray, clipping the volume by restricting ray-casting within the start and end points of the depth range buffer, and rendering a portion of the image data corresponding to the visible depth range. | 04-23-2009 |
20090135180 | APPARATUS AND METHOD FOR VOLUME RENDERING ON MULTIPLE GRAPHICS PROCESSING UNITS (GPUs) - A method for volume rendering a volumetric dataset with multiple graphics processing units (GPUs) coupled to a computer system, comprises building a block hierarchical structure of blocks for the volumetric dataset, the block hierarchy comprising a block sequence; partitioning the block sequence into a plurality of groups; determining a target work load for each GPU; allocating each group of the plurality to a respective GPU in accordance with the target load; rendering respective intermediate images by the respective GPUs; and compositing for a final image by blending the respective intermediate images. | 05-28-2009 |
20090284537 | FRAMEWORK FOR PROCESSING AND RENDERING LARGE VOLUME DATA - Described herein is a system and method for facilitating large volume data processing and rendering. An exemplary system includes at least one processor coupled to a first memory, wherein the processor is configured to organize the large volume data in the first memory into one or more bricks. In addition, at least one graphics processing unit (GPU) is coupled to the processor and a second memory. The GPU is configured to process at least one or more bricks transferred from the first memory to the second memory to produce intermediate processing results, and to further render the intermediate processing results. | 11-19-2009 |
20090295800 | METHOD FOR DIRECT VOLUMETRIC RENDERING OF DEFORMABLE BRICKED VOLUMES - A method for rendering a deformable object. The method includes: obtaining a 3D volumetric voxel dataset of a region, such region having therein an object to be rendered; building a tree hierarchical structure for the obtained volumetric dataset, such tree structure blocks as the nodes of a primary tree hierarchy and bricks being those blocks stored as textures in a video memory; augmenting the primary tree hierarchical structure with maximum and minimum values of the data contained within a block; creating a neighborhood tree hierarchy having for each leaf block of the neighborhood tree hierarchy a reference to the neighboring leaf blocks in the neighborhood tree hierarchy as well as references to neighboring bricks in the neighborhood tree hierarchy; updating the information about minimum and maximum in the primary tree hierarchy by saving for each block the minimum and maximum of the neighboring blocks; and rendering the leaf blocks in visibility order. | 12-03-2009 |
20130038605 | SELECTIVE FLOW VISUALIZATION OF TRACED PARTICLES - A method for tracing a plurality of virtual particles through a flow filed includes receiving a flow field. A flow domain is divided into cells. Virtual particles are defined within the flow domain and values are collected for flow properties at each cell. A histogram is generated for each cell representing the collected flow properties for that corresponding cell. The histogram includes, for each of the one or more flow properties, a plurality of bins defining ranges of property values and a count of virtual particles within that cell that exhibit those properties. The histograms for the plurality of cells are advected with respect to the flow field over time. A graphical representation of the plurality of particles within the flow domain is rendered based on the advected histograms for the plurality of cells using a graphics processor. | 02-14-2013 |
20130063436 | FLOATING VOLUME-OF-INTEREST IN MULTILAYER VOLUME RAY CASTING - A method that includes receiving vertices of a mesh, wherein the mesh represents a volume of interest (VOI) from an original volume, performing a transformation operation on the mesh, wherein the transformation operation transforms vertices of the mesh, obtaining sampling locations of the original volume using the transformed vertices, performing an inverse transformation on the transformed vertices of the mesh and the sampling locations, and performing a ray casting on the original volume to produce an image, wherein the ray casting uses the transformed vertices and a result of the inverse transformation as input. | 03-14-2013 |
20150022522 | Luggage Visualization and Virtual Unpacking - Methods and systems for luggage visualization perform virtual unpacking by visually moving an object image away from its original pose. A scanned 3D volume is segmented guided by a confidence measure to create a label volume whose voxels specify the detected object IDs. The luggage dataset and the label volume are visualized by volume rendering. Using an automatic coloring algorithm, any pair of objects whose projections are adjacent in an image are assigned distinct hues. A layered framework efficiently renders a scene mixed with packed luggage, animated unpacking objects, and already unpacked objects put aside for further inspection. A GPU is used to automatically select objects that are not blocked by others and can be unpacked. | 01-22-2015 |