58 results about "View dependent" patented technology

Interactive geographic information systems (GIS) and techniques are disclosed that provide users with a greater degree of flexibility, utility, and information. A markup language is provided that facilitates communication between servers and clients of the interactive GIS, which enables a number of GIS features, such as network links (time-based and view-dependent dynamic data layers), ground overlays, screen overlays, placemarks, 3D models, and stylized GIS elements, such as geometry, icons, description balloons, polygons, and labels in the viewer by which the user sees the target area. The markup language is used to describe a virtual camera view of a geographic feature. A compressed file format holds multiple files utilized to display a geographic feature in a single file.

Interactive geographic information systems (GIS) and techniques are disclosed that provide users with a greater degree of flexibility, utility, and information. A markup language is provided that facilitates communication between servers and clients of the interactive GIS, which enables a number of GIS features, such as network links (time-based and/or view-dependent dynamic data layers), ground overlays, screen overlays, placemarks, 3D models, and stylized GIS elements, such as geometry, icons, description balloons, polygons, and labels in the viewer by which the user sees the target area. Also, “virtual tours” of user-defined paths in the context of distributed geospatial visualization is enabled. Streaming and interactive visualization of filled polygon data are also enabled thereby allowing buildings and other such features to be provided in 3D. Also, techniques for enabling ambiguous search requests in a GIS are provided.

A novel method and system for 3d-aided-2D face recognition under large pose and illumination variations is disclosed. The method and system includes enrolling a face of a subject into a gallery database using raw 3D data. The method also includes verifying and/or identifying a target face form data produced by a 2D imagining or scanning device. A statistically derived annotated face model is fitted using a subdivision-based deformable model framework to the raw 3D data. The annotated face model is capable of being smoothly deformed into any face so it acts as a universal facial template. During authentication or identification, only a single 2D image is required. The subject specific fitted annotated face model from the gallery is used to lift a texture of a face from a 2D probe image, and a bidirectional relighting algorithm is employed to change the illumination of the gallery texture to match that of the probe. Then, the relit texture is compared to the gallery texture using a view-dependent complex wavelet structural similarity index metric.

A computer-based method and system for interactive volume rendering of a large volume data on a conventional personal computer using hardware-accelerated block filtration optimizing uses 3D-textured axis-aligned slices and block filtration. Fragment processing in a rendering pipeline is lessened by passing fragments to various processors selectively in blocks of voxels based on a filtering process operative on slices. The process involves generating a corresponding image texture and performing two-pass rendering, namely a virtual rendering pass and a main rendering pass. Block filtration is divided into static block filtration and dynamic block filtration. The static block filtration locates any view-independent unused signal being passed to a rasterization pipeline. The dynamic block filtration determines any view-dependent unused block generated due to occlusion. Block filtration processes utilize the vertex shader and pixel shader of a GPU in conventional personal computer graphics hardware. The method is for multi-thread, multi-GPU operation.

An image is displayed by determining a relative position and orientation of a display in relation to a viewer's head, and rendering an image based on the relative position and orientation. The viewer's eye movement relative to the rendered image is tracked, with at least one area of interest in the image to the viewer being determined based on the viewer's eye movement, and an imaging property of the at least one area of interest is adjusted.

A handheld device having a display and a front-facing sensor and a back-facing sensor is able to render 3D content in a realistic and spatially correct manner using position-dependent rendering and view-dependent rendering. In one scenario, the 3D content is only computer-generated content and the display on the device is a typical, non-transparent (opaque) display. The position-dependent rendering is performed using either the back-facing sensor or a front-facing sensor having a wide-angle lens. In another scenario, the 3D content is composed of computer-generated 3D content and images of physical objects and the display is either a transparent or semi-transparent display where physical objects behind the device show through the display. In this case, position-dependent rendering is performed using a back-facing sensor that is actuated (capable of physical panning and tilting) or is wide-angle, thereby enabling virtual panning.

A method of reconstructing a 3D model includes reconstructing a 3D voxel-based visual hull model using input images of an object captured by a multi view camera; converting the 3D voxel-based visual hull model into a mesh model; and generating a result of view-dependent rendering of a 3D model by performing the view-dependent texture mapping on the mesh model obtained through the conversion. Further, the reconstructing includes defining a 3D voxel space to be reconstructed; and excluding voxels not belonging to the object from the defined 3D voxel space.

A method for culling visual data streams. Specifically, one embodiment of the present invention discloses a method for culling view dependent visual data streams for a virtual environment. The method begins by determining a view volume of a viewing participant within the virtual environment. The view volume determines a field-of-view of the viewing participant within the virtual environment. The embodiment of the method then determines a proximity of a representation of an observed object in the virtual environment to the view volume. Thereafter, the embodiment of the method processes a view dependent visual data stream of the observed object only when the representation is within a specified proximity to the view volume.

A three-dimensional image display system utilizing both a light beam reproducing method and a shadowgraph multi-view parallax method, including a color filter is disposed on an observer side of a white-color point light source array, and, in an area apart from the color filter and white point light source, light beams emitted from the white-color point light source are selectively colored by the color filter for generating an image of each point of an object, while in the region in the vicinity of the point light source and the color filter, the light beams are selectively colored by the color filter so that image data reaching the eye from the white-color point light source through the color filter performs a view-dependent parallax stereoscopic display operation not only laterally but also vertically, and in the intermediate region, these two operations are mixed, so that a stereoscopic image is continuously formed.

The present invention relates to computer graphics. This method allows efficient real-time 3D rendering of high-detail smooth surfaces. It is exceptionally effective with software rendering and low-end weaker graphics accelerators, and provides excellent visible quality per the amount of polygons used, while retaining low CPU processing overhead and high efficiency on graphics hardware. Also, it can be used under very restrictive memory requirements. In particular the invention relates to real time rendering of extremely detailed smooth surfaces with view-dependent tessellation using an improved level of detail approach. The invention utilizes a quad-tree map and geometric boundaries consisting of manifold non-self-intersecting surfaces. All cached fragments keep all of the information loaded from their corresponding source nodes in system memory, and additional information computed by the rendering system.

Aspects of the invention relate generally determining user interests and providing relevant information based on user interaction with 3D models. More specifically, a when a user interacts with a 3D model of an object, for example on a map or from a database of models, the user's view of the object along with the location of the interaction (or where the user clicked on the object) may be transmitted to a server. In response, based on the view and location of the click, the server identifies relevant content and transmits it to the user.

A method for simultaneous visualization of the outside and the inside of a surface model at a selected view orientation includes receiving a digitized representation of a surface of a segmented object, where the surface representation comprises a plurality of points, receiving a selection of a viewing direction for rendering the object, calculating an inner product image be calculating an inner product {right arrow over (n)}_p·{right arrow over (d)} at each point on the surface mesh, where {right arrow over (n)}_p is a normalized vector representing the normal direction of the surface mesh at a point p towards the exterior of the object and {right arrow over (d)} is a normalized vector representing the view direction, and rendering the object using an opacity that is a function of the denoised inner product image to yield a rendered object, where an interior of the object is rendered.

A system and process for reconstructing optimal texture maps from multiple views of a scene is described. In essence, this reconstruction is based on the optimal synthesis of textures from multiple sources. This is generally accomplished using basic image processing theory to derive the correct weights for blending the multiple views. Namely, the steps of reconstructing, warping, prefiltering, and resampling are followed in order to warp reference textures to a desired location, and to compute spatially-variant weights for optimal blending. These weights take into consideration the anisotropy in the texture projection and changes in sampling frequency due to foreshortening. The weights are combined and the computation of the optimal texture is treated as a restoration problem, which involves solving a linear system of equations. This approach can be incorporated in a variety of applications, such as texturing of 3D models, analysis by synthesis methods, super-resolution techniques, and view-dependent texture mapping.

A Prioritized-Layered Projection (PLP) method and system for optimizing the rendering high-depth complexity scenes. Objects in each frame are prioritized with an estimation of the visible set within the rendered frame. A priority order for only the primitives in visible sets within the frame are computed "on demand" to maximize the likelihood of rendering visible primitives before rendering occluded ones. For a fixed budget, such as, time or number of triangles, rendering is constrained to a geometry budgeted priority. The method includes two main steps: an occupancy-based tessellation of space; and a solidity-based traversal algorithm. By first computing an occupancy-based tessellation of space, more cells result where there are more geometric primitives. In this spatial tessellation, each cell is assigned a "solidity" value directly proportional to its likelihood of occluding other cells. In its simplest form, a cell's solidity value is directly proportional to the number of primitives contained within the cell. Cells are marked for projection, and the geometric primitives contained within the marked cells are rendered. Cell solidity, and other view-dependent information determines the order cells are rendered.

A method renders a model of a 3D object. A polygon model of the 3D object is generated, and a set of input images are acquired of the object. For each vertex of the polygon model, a set of visible views are located, and a set of closest views are selected from the visibility views. Blending weights are determined for each closest view. Then, the each polygon in the model is rendered into an output image. The rendering is performed by blending images of the set of input images corresponding to the set of closest views of each vertex of the polygon using the blending weights.

A computer implemented method for generating a representation of structure for use in rendering a synthesized image is provided. The representation is a view-dependent displacement mapping that represents displacements along a viewing direction. This view dependency allows the representation to be used to determine self shadows as well as shading, occlusion and silhouettes when used during rendering for synthesis.

An exemplary method for displaying geographic data in a three-dimensional environment includes identifying a node in a node tree including an instance set. The method also includes identifying a first level-of-detail and a second level-of-detail of a model referenced by the instance set in the node, the level-of-detail having a higher resolution than the first level-of-detail. The method further includes identifying a maximum number of instances at the second level-of-detail to render in a frame period. The method also includes determining an estimated density of the instance set in the node and an estimated density for a scene as a whole. The method further includes determining an LOD distance from a location of the virtual camera to a boundary that separates an instance at the first level-of-detail from an instance at the second level-of-detail.