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| Number | Title | Issue Date |
| 6628280 | Method for selectively regenerating an adaptively sampled distance field A method for modeling a graphics object generates a model of the graphics object. An adaptively sampled distance field is generated from the model according to an error measure. The adaptively sampled distance field includes interior, surface, and exterio... | 09/30/2003 |
| 6628281 | Method and system for computing the intersection of a bounding volume and screen-aligned plane Apparatus and methods are provided to perform volume rendering via composited texture-mapped convex polyhedra. This is accomplished by generating a sequence of z polygons defined by the intersection of a sequence of z planes parallel to the view plane wit... | 09/30/2003 |
| 6616701 | Method and apparatus for identifying features of multidimensional image data in hypermedia systems In a method and apparatus for identifying features of multidimensional image data in hypermedia systems a multidimensional image, secondary image map and object index associate a program action with each object defined in an image.... | 09/09/2003 |
| 6606091 | System for interactive 3D object extraction from slice-based medical images The present invention relates to a method and a system for extracting a 3D region of interest from a stack of medical scan slices which is still a challenging task even in this new millennium. One difficulty is that there is no robust automatic algorithm ... | 08/12/2003 |
| 6606089 | Method for visualizing a spatially resolved data set A method for visualizing a spatially resolved data set, the data of which are in each case associated with a volume element of which the position is described by coordinates in a non-Cartesian measurement coordinate system, the data M(rk, θj, zi) are loa... | 08/12/2003 |
| 6597359 | Hierarchical space subdivision hardware for ray tracing The invention is a method and apparatus for a ray tracer incorporating major functions of ray tracing in hardware. The invention performs the hierarchical space subdivision technique of accelerating a ray tracer, statically or dynamically. The preferred e... | 07/22/2003 |
| 6580936 | Coloring method and apparatus for multichannel MRI imaging process The present invention scanes a plurality of MRI images while varying conditions for a sample usable in color-determination and MRI imaging, subjects the image data to a first independent component analysis to decompose the data into L independent componen... | 06/17/2003 |
| 6573912 | Internet system for virtual telepresence An interactive virtual telepresence system allows an Internet user to view three-dimensional objects from any perspective in a studio at a remote server. The system includes several video cameras trained on the three-dimensional objects and a computer tha... | 06/03/2003 |
| 6573893 | Voxel transfer circuit for accelerated volume rendering of a graphics image A voxel transfer circuit that implements high-speed voxel transfer operations. When implemented in a 2D or 3D texture mapping circuit of a graphics system, or in a graphics card adapter of a workstation, the voxel transfer circuit provides a comprehensive... | 06/03/2003 |
| 6570575 | Associated color texture processor for high fidelity 3-D graphics rendering Texture mapping computer graphics apparatus includes an associating interpolator circuit for determining first interpolated opacity weighted colors and a first interpolated opacity in response to texture coordinates and texture colors and corresponding te... | 05/27/2003 |
| 6559843 | Segmented ray casting data parallel volume rendering Volumetric data are rendered onto an image plane by first organizing the volumetric data into a plurality of blocks of data, each block of data including a plurality of voxels arranged in cubic structure. The blocks of volumetric data are stored in, and p... | 05/06/2003 |
| 6556199 | Method and apparatus for fast voxelization of volumetric models The present invention relates to an apparatus and method for voxelizing geometric and volumetric models of objects in 3D space, i.e. converting these 3D models into a voxel-based volume representation. Based on an unconventional way of using the 3D graphi... | 04/29/2003 |
| 6552722 | Systems and methods for sculpting virtual objects in a haptic virtual reality environment A user of a virtual object or computer model uses a haptic interface device in the real world to manipulate a virtual tool in a virtual environment to interact and modify the virtual object. The user uses the virtual tool in a sculpting mode to modify the... | 04/22/2003 |
| 6545678 | Methods, systems, and computer program products for generating tissue surfaces from volumetric data thereof using boundary traces Tomographic images, including a tissue surface, are selected from volumetric data to provide selected tomographic images, each of the selected tomographic images has a respective orientation with respect to the tissue surface. Manual input data is accepte... | 04/08/2003 |
| 6542153 | Method and system for three-dimensional volume editing for medical imaging applications A system and a method for three dimensional (3D) volume editing for medical imaging applications is disclosed. The method and system comprise the steps of projecting vertices of the at least one ROI in one plane and transforming the data within the at lea... | 04/01/2003 |
| 6542154 | Architectural extensions to 3D texturing units for accelerated volume rendering Volume rendering of an image from a volume data set is performed by dividing the image into a plurality of sub-regions and processing the sub-regions one at a time. The sub-regions are processed one at a time by a chip including a triangle unit for creati... | 04/01/2003 |
| 6532017 | Volume rendering pipeline A plurality of identical rendering pipelines are connected in parallel to read an array of voxels and to write an array of pixels. Each pipeline processes one voxel in one processing cycle of the pipelines. Each pipeline includes a plurality of serially c... | 03/11/2003 |
| 6525729 | Raycasting system and method A method of determining a z-buffer for a voxel data set, comprising first raycasting at least a first ray to determine a value for a first z-buffer element; and second raycasting at least a second ray to determine a value for a second z-buffer element, wh... | 02/25/2003 |
| 6512517 | Volume rendering integrated circuit A volume rendering integrated circuit includes a plurality of interconnected pipelines having stages operating in parallel. The stages of the pipelines are interconnected in a ring, with data being passed in only one direction around the ring. The volume ... | 01/28/2003 |
| 6512516 | Voxel-based system to permit rapidly deforming volumetric objects made up of inhomogeneous material An improvement to a voxel-based system to permit rapidly deforming volumetric objects made up of inhomogeneous material provides different material constraints assigned to different elements, with the constraints of a link between two neighboring elements... | 01/28/2003 |
| 6510244 | Method and system for acquiring a three-dimensional shape description Method for acquiring a three-dimensional shape or image of a scene, wherein a predetermined pattern of lines is projected onto the scene and the shape is acquired on the basis of relative distances between the lines and/or intersections of the lines of th... | 01/21/2003 |
| 6509902 | Texture filtering for surface elements In a method for filtering shade attributes of surface points of a graphic object onto pixels in an image buffer according to depth values stored in a depth buffer, tangential disks are constructed at positions of each surface point. The tangential disks h... | 01/21/2003 |
| 6501471 | Volume rendering A method for use with a computer system includes assembling a group of volume units to represent at least a portion of a three-dimensional (3-D) object and compressing each volume unit onto a pixel plane to form an associated indication of the volume unit... | 12/31/2002 |
| 6498607 | Method for generating graphical object represented as surface elements Provided is a method for representing a graphic object in a memory. A surface of the object is partitioned into a plurality of cells having a grid resolution related to an image plane resolution. Each cell is bounded by eight grid points related to the im... | 12/24/2002 |
| 6492988 | Hyper-dimensional datascope A signal analyzing and display system includes an input interface for continuously acquiring signals in parallel. A first triggering component samples signals according to predetermined time intervals. A second triggering component samples the input signa... | 12/10/2002 |
| 6489961 | Rasterization of lines in a cylindrical voxel grid In a cylindrical coordinate system, the dominant direction of a line changes in a predictable manner. A rasterizer uses this fact to efficiently render a desired line on a volumetric display. It does do by determining whether first and second points on th... | 12/03/2002 |
| 6483507 | Super-sampling and gradient estimation in a ray-casting volume rendering system A volume rendering processor renders a two-dimensional image from a volume data set of voxels constituting a three-dimensional representation of an object. Voxel memory interface logic retrieves the voxels from a voxel memory in a scanned order with respe... | 11/19/2002 |
| 6483948 | Microscope, in particular a stereomicroscope, and a method of superimposing two images The invention concerns an imaging system comprising a first device (82) for acquiring image data for an object (93) using light, in particular a microscope, and a second device (94) for acquiring and displaying image data (in particular, of the kind not i... | 11/19/2002 |
| 6480190 | Graphical objects represented as surface elements Provided is a method representing an object by partitioning a surface of the object into a plurality of cells having a grid resolution related to an image plane resolution. Each cell including a single point and points in adjacent cells are connected by l... | 11/12/2002 |
| 6476810 | Method and apparatus for generating a histogram of a volume data set A method generates a histogram of a volume data set in a rendering pipeline. The volume data set includes a plurality of samples stored in a memory. Each sample is partitioned in parallel into a plurality of field according to a plurality of format regist... | 11/05/2002 |
| 6448968 | Method for rendering graphical objects represented as surface elements Provided is a method for modeling a representation of a graphic object. A surface of the object is partitioned into a plurality of cells having a grid resolution related to an image plane resolution. A single zero-dimensional surface element is stored in ... | 09/10/2002 |
| 6441821 | Method and apparatus for displaying three-dimensional image by use of tensor rendering In order to visually display a spatial distribution of a multi-value function represented by nine components of a two-order, three-dimensional tensor, a distribution function of an anisotropic fine face distribution is set to have a form of a second-order... | 08/27/2002 |
| 6442293 | Image forming apparatus, image forming method and computer-readable storage medium having an image forming program An image forming process for easily making an image drawing (ortho-image) in an actual place while confirming it in real time. Measuring of control points (at least three points) is performed (S110), and preparation is made for forming an ortho-image base... | 08/27/2002 |
| 6438403 | Method and apparatus for cardiac analysis using four-dimensional connectivity An imaging system enables cardiac functioning within a particular cardiac chamber to be imaged. The system acquires imaging data that includes intensity values for four-dimensional voxels within a region of interest (ROI). A seed voxel is identified, and ... | 08/20/2002 |
| 6429884 | Method and apparatus for processing and playback of digital images at a display monitor In a method and apparatus for presenting and processing an image reproducible at a display monitor, wherein digital image data of an examination volume of a subject are registered with an image pickup system, such as a medical examination installation, th... | 08/06/2002 |
| 6426749 | Method and apparatus for mapping reflectance while illuminating volume data in a rendering pipeline Reflection intensities of volume samples of a volume are mapped in a rendering pipeline by determining a reflection vector from a gradient vector associated with a sample and an eye vector associated with the volume. A diffuse reflectance map is indexed b... | 07/30/2002 |
| 6424346 | Method and apparatus for mapping samples in a rendering pipeline A method maps samples in a rendering pipelines. The samples are stored in a sample memory. Each sample has a plurality of fields. A descriptor is stored for each field in a field format register. Each sample is read from the memory into a mapping unit. Th... | 07/23/2002 |
| 6421057 | Configurable volume rendering pipeline A volume rendering pipeline includes a plurality of processing stages such as a gradient estimation stage, an interpolation stage, a classification stage, an illumination stage, and a compositing stage. The stages are connected to each other by multiplexe... | 07/16/2002 |
| 6411296 | Method and apparatus for applying modulated lighting to volume data in a rendering pipeline Samples of a volume are lighted in a rendering pipeline by having a first arithmetic unit combine a modulated emissive coefficient with a modulated diffuse coefficient and a modulated diffuse intensity. A second arithmetic logic unit combines a specular c... | 06/25/2002 |
| 6407738 | Method and apparatus for analytical modeling The invention involves: a voxel data reading process (step S1) used to read voxel data on the shape of an object of analysis that is defined by the groups of rectangles of voxels; a boundary determination process used to determine whether each voxel conta... | 06/18/2002 |
