Matches 151 - 200 out of 434 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
6812927 System and method for avoiding depth clears using a stencil buffer  
A system and method are provided for reducing the number of depth clear operations in a hardware graphics pipeline. Initially, a frame count is stored into a frame buffer associated with the...
6774895 System and method for depth clamping in a hardware graphics pipeline  
A system, method and computer program product are provided for depth clamping in a hardware graphics pipeline. Initially, a depth value is identified. It is then determined as to whether a hardware...
6774910 Method and system for providing implicit edge antialiasing  
A method and system for providing antialiasing of a graphical image on a display from data describing at least one object is disclosed. The display includes a plurality of pixels. The method and...
6771841 Determining a bounding shape for a collection of points  
A multi-dimensional bounding sphere is determined for a collection of points by determining a multi-dimensional bounding box that encompasses all of the points, determining the center of the...
6768487 Method and apparatus for occlusion culling in graphics systems  
Z-buffer rendering of three-dimensional scenes is made more efficient through a method for occlusion culling by which occluded geometry is removed prior to rasterization. The method uses...
6762758 System, method, and apparatus for compression of video data using offset values  
A system, method, and apparatus for compression of video data is presented. The compressed block includes a plurality of offset values, each indicating an offset between a corresponding one among...
6756993 Methods and apparatus for rendering images using 3D warping techniques  
Methods and apparatus for rendering images are presented. The method includes the step of segmenting at least one reference image in a reference image space into a plurality of tiles, each tile...
6747645 Graphics memory system that utilizes detached-Z buffering in conjunction with a batching architecture to reduce paging overhead  
A graphics memory system of a graphics display which utilizes a batching architecture in conjunction with detached Z buffering to minimize paging overhead is disclosed. The graphics memory system...
6747657 Depth write disable for zone rendering  
A depth write disable apparatus and method for controlling evictions, such as depth values, from a depth cache to a corresponding depth buffer in a zone rendering system. When the depth write...
6744433 System and method for using and collecting information from a plurality of depth layers  
A system and method are provided for using information from at least one depth layer and for collecting information about at least one additional depth layer utilizing a graphics pipeline....
6744432 Method and apparatus for determining a representative Z values in a video graphics system  
A method and apparatus for determining a rear most Z value for a pixel block is presented, where the pixel block is a portion of the image data for a frame as stored in a frame buffer. The frame...
6741248 Rendering geometric features of scenes and models by individual polygons  
A method renders a mesh constructed of polygons representing a graphics model one at the time to accentuate geometric features of the mesh. At least one additional polygon is generated at each edge...
6741247 Shading 3-dimensional computer generated images  
An apparatus for shading 3-dimensional computer generated images representing each object in the image by a set of flat polygons. Vertex data (x, y) is supplied for each vertex of the polygon along...
6738061 Method, apparatus, storage medium, program, and program product for generating image data of virtual three-dimensional space  
A method for reflecting color data of back or far surfaces of a plurality of transparent polygons overlapped with each other in an eyes direction, on a display screen. The method for generating...
6734854 Image processing method and storage medium for storing image processing programs  
An image processing method whereby an image of object generated in real time in a pre-generated background image by giving operators an impression of depth or distance can be synthesized and a...
6727899 System and method for occlusion culling graphical data  
A graphical display system of the present invention efficiently performs occlusion culling based on frame-to-frame temporal coherency. The graphical display system utilizes a frame buffer and...
6724391 Mechanism for implementing Z-compression transparently  
The present invention provides a mechanism for implementing z-compression in a manner that is transparent to the user. Blocks of z-data are associated with storage locations in a z-data buffer in...
6720964 Method and apparatus for processing portions of primitives that are being rendered  
A method and apparatus for processing portions of primitives that are being rendered is presented. Primitives that are received are divided into portions that correspond to pixel blocks of the...
6700584 Method and apparatus for handling translucency in 3D graphics  
In a method of image processing for rendering a two-dimensional pixel image from a plurality of triangular image primitives to be projected onto an image plane, parameter values at positions within...
6700573 Method for rendering realistic terrain simulation  
A technique for the realistic simulation of visual scenes uses voxels generated from positional and elevational data combined with a stored color map to generate vertex and triangle data that is...
6686915 Systems and methods for rendering visual effects that are a function of depth  
Systems and methods for accurately and realistically rendering a visual effect such as fog, colored liquids, gels, smoke, mists, and the like for which the visual appearance of the effect can...
6680734 Game system, imaging method in the game system, and computer readable storage medium having game program stored therein  
An opened polygon including a transparent region for maintaining a backward drawing state is drawn. Next, a mask polygon which inhibits another polygon and texture from begin forwardly drawn...
6677945 Multi-resolution depth buffer  
The present invention provides a system and method for eliminating hidden surfaces in 3D graphics that improves rendering performance by decreasing the size of the data stored to or retrieved from...
6677944 Three-dimensional image generating apparatus that creates a three-dimensional model from a two-dimensional image by image processing  
A three-dimensional model is created without carrying out complicated modeling by incorporating elements of a two-dimensional image into the three-dimensional model. A two-dimensional image...
6670955 Method and system for sort independent alpha blending of graphic fragments  
The method provides for sort independent alpha blending of fragments of a graphic image. A sequence of fragments has opaque fragments and transparent fragments. The opaque fragments are rendered to...
6664958 Z-texturing  
A graphics system including a custom graphics and audio processor produces exciting 2D and 3D graphics and surround sound. The system includes a graphics and audio processor including a 3D graphics...
6664959 Method and apparatus for culling in a graphics processor with deferred shading  
Structure, apparatus, and method for performing conservative hidden surface removal in a graphics processor. Culling is divided into two steps, a magnitude comparison content addressable memory...
6664962 Shadow mapping in a low cost graphics system  
A graphics system including a custom graphics and audio processor produces exciting 2D and 3D graphics and surround sound. The system includes a graphics and audio processor including a 3D graphics...
6661914 Method of reconstruction of tridimensional scenes and corresponding reconstruction device and decoding system  
The invention relates to a new method of reconstruction of tridimensional scenes. While conventional methods are often limited to the 3D reconstruction of the bounding volume of the concerned...
6650325 Method, apparatus and article of manufacture for boustrophedonic rasterization  
A method, apparatus and article of manufacture are provided for performing rasterization using alternating sense point traversal. Upon receipt of a primitive, i.e. a triangle, a plurality of points...
6646639 Modified method and apparatus for improved occlusion culling in graphics systems  
A system, method and computer program product are provided for avoiding reading z-values in a graphics pipeline. Initially, near z-values are stored which are each representative of a near z-value...
6639597 Visibility splatting and image reconstruction for surface elements  
In a method for projecting surface points of a graphic object onto pixels in a depth buffer to determine depth values of the pixels, each surface point is projected onto a corresponding pixels. A...
6636226 Method and apparatus for controlling compressed Z information in a video graphics system  
A method and apparatus for managing compressed Z information in a video graphics system is described. Pixels in a display frame are grouped into a plurality of pixel blocks, where each pixel block...
6636215 Hardware-assisted z-pyramid creation for host-based occlusion culling  
Roughly described, the invention is employed within a z-buffer-system having a host processor and graphics hardware that performs hierarchical z-buffering. The z-buffer system renders...
6636214 Method and apparatus for dynamically reconfiguring the order of hidden surface processing based on rendering mode  
A graphics system including a custom graphics and audio processor produces exciting 2D and 3D graphics and surround sound. The system includes a graphics and audio processor including a 3D graphics...
6630933 Method and apparatus for compression and decompression of Z data  
The present invention provides a scheme for compressing the depth, or Z, components of image data. The data is grouped into a plurality of tiles. A test is performed to determine if a tile can be...
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...
6628284 Method and apparatus for processing graphics perspective transformations  
A method and apparatus in a data processing system for processing perspective transformations. An estimate of a depth coordinate is obtained. A determination is made as to whether the estimate is...
6621811 Method and system for generating multiple pilot beacons of different frequencies from a single pilot beacon  
A method and system for producing a plurality of pilot beacon signals with different carrier frequencies is disclosed. One original pilot beacon signal is first obtained, and a splitter is used to...
6618047 Visibility calculations for 3d computer graphics  
Disclosed is a method of reducing the complexity of hidden surface removal in 3D graphics systems. A fuzzy projection (FF) of a surface (SU) as seen from a number of viewpoints (VP) in a bounding...
6618048 3D graphics rendering system for performing Z value clamping in near-Z range to maximize scene resolution of visually important Z components  
A graphics system including a custom graphics and audio processor produces exciting 2D and 3D graphics and surround sound. The system includes a graphics and audio processor including a 3D graphics...
6618054 Dynamic depth-of-field emulation based on eye-tracking  
A graphics system comprising a rendering engine, a sample buffer and a filtering engine. The rendering engine receives graphics primitives, generates sample positions, computes a depth value and...
6614444 Apparatus and method for fragment operations in a 3D-graphics pipeline  
Apparatus and methods for rendering 3D graphics images. The apparatus include a port for receiving commands from a graphics application, an output for sending a rendered image to a display and a...
6614425 System and method for the adaptive mapping of matrix data to sets of polygons  
A system and method for converting bitmapped data, for example, weather data or thermal imaging data, to polygons is disclosed. The conversion of the data into polygons creates smaller data files....
6611268 System and process for generating 3D video textures using video-based rendering techniques  
A system and process for generating a 3D video animation of an object referred to as a 3D Video Texture is presented. The 3D Video Texture is constructed by first simultaneously videotaping an...
6611264 Deferred scanline conversion architecture  
The deferred scanline converter system in accordance with the present invention receives. triangle data from a front end processor, identifies the triangles that are in competition for a given...
6603475 Method for generating stereographic image using Z-buffer  
A method for generating a three-dimensional stereographic image on the basis of a two-dimensional planar image for one eye and depth information of the image stored in the Z-buffer. The first...
6603474 Method and apparatus for occlusion culling of objects in a data processing system  
A method in a data processing system for displaying a drawing for a view point, wherein the drawing includes a set of objects. A plurality of bounding boxes and complexity data for the set of...
6600491 Video-based rendering with user-controlled movement  
A system and process for generating a video animation from the frames of a video sprite with user-controlled motion is presented. An object is extracted from the frames of an input video and...
6584219 2D/3D image conversion system  
A 2D/3D image conversion system includes target phase value calculating means for calculating a target phase value per parallax calculation region based on a dynamic range of a preset target phase...
Matches 151 - 200 out of 434 < 1 2 3 4 5 6 7 8 9 >