80 results about "Wire-frame model" patented technology

Systems and methods of determining the volume and dimensions of a three-dimensional object using a dimensioning system are provided. The dimensioning system can include an image sensor, a non-transitory, machine-readable, storage, and a processor. The dimensioning system can select and fit a three-dimensional packaging wireframe model about each three-dimensional object located within a first point of view of the image sensor. Calibration is performed to calibrate between image sensors of the dimensioning system and those of the imaging system. Calibration may occur pre-run time, in a calibration mode or period. Calibration may occur during a routine. Calibration may be automatically triggered on detection of a coupling between the dimensioning and the imaging systems.

A system and method for minimizing the amount of photographic data to be collected to reconstruct a model of a three-dimensional object such as a building. In one embodiment a systematic process is used to collect survey and detailed photographic data from designated facades and architectural components of the facades to be processed into graphical tiles. The graphical tiles are textured or coated onto a three-dimensional wireframe model of the building. In one embodiment, the amount of photographic data to be collected is based on the footprint of the building, the height of the building and the number of unique facades and architectural details on the facades. In one embodiment, photographic data of the objects surrounding the building is also collected for modeling with the building. The virtual three-dimensional building models can be incorporated into the virtual three-dimensional city model which is a realistically accurate depiction of a city environment including all the details of an actual city.

A system, and computer implemented method are provided for interactively displaying three-dimensional structures. Three-dimensional volume data (34) is formed from a series of two-dimensional images (33) representing at least one physical property associated with the three-dimensional structure, such as a body organ having a lumen. A wire frame model of a selected region of interest is generated (38b). The wireframe model is then deformed or reshaped to more accurately represent the region of interest (40b). Vertices of the wire frame model may be grouped into regions having a characteristic indicating abnormal structure, such as a lesion. Finally, the deformed wire frame model may be rendered in an interactive three-dimensional display.

Geometric correction of rough wireframe models derived from photographs may include rectification of either a 2D or 3D original wireframe model of a roof structure, derivation of metadata from the original wireframe, in-plane normalization of the wireframe, extrusion into a “rough” 3D wireframe based on the normalized wireframe, and correction of the “rough” 3D wireframe. The correction and normalization may be an iterative process based on initial pitch values, metadata derived from the original or corrected wireframe models and defined constraints regarding relationships between roof portions or segments. The iterative process may repeat adjusting the wireframe model until the adjusting converges to a stable state according to the various defined constraints.

A three dimensional shape correlation computer software program which uses laser radar data for target identification. The correlation program obtains a scan of laser radar data of a target from a Ladar sensor. The data includes a plurality of X,Y,Z coordinate detection points for the target. The software simulates the sensor scan using a 3D wire-frame model of the target. An X,Y,Z coordinate location is computed for every point in the computer model of the target. The software compares the X,Y,Z coordinate detection points for the target with the X,Y,Z coordinate points for the computer model to determine if the points match. When there is a match a target identification is declared.

A 3-D wireframe model expressed in terms of nodes and vertices receives a 3-D video or like signal representative of a scene expressed in terms of a reference model, I frames and P frames. A DPCM coder takes advantage of the temporal correlation of the displacement of each vertex along every axis in the 3-D space. The 3-D signal is a set of non-zero displacements of all vertices and all nodes (s_l[n, v]) at time t_l. The decoded set (animation frame) of the previous instance is used as the predicted value (s_i-l[n, v]). The prediction error e_l[n, v], i.e. the difference between the current displacement set and the predicted one, is computed and quantised (e_l[n, v]). Finally, the quantised samples are entropy coded (c_i[n, v]) using an adaptive arithmetic coding algorithm to handle the unknown data statistics. The predictive scheme described above prevents quantization error accumulation. A DPCM decoder first decodes arithmetically the received samples (‘e’ [n, v]) and computers the decoded samples (s_i′ [n, v]).

Prior methods of measuring diamond proportions in order to construct a complete model, such as a three dimensional virtual wire-frame model, of a diamond have been found to be inadequate. In particular, there has been no commercially available, automated and objective method for measuring the dimensions of a diamond with similar or greater accuracy as compared with the accuracy that can be achieved with manual gauges or micrometers. The present invention provides a method of measuring a physical characteristic of a facet of a diamond, such as the location of one or more points on an edge of a facet. The method comprises illuminating the diamond to visually distinguish a facet from adjacent facets when viewed from a predetermined location, and then capturing an image of the diamond as viewed from this predetermined location. The image is then analyzed to determine the location of at least one point located on an edge of a facet by identifying a discontinuity in the properties of light transmitted from the diamond to the viewing location.

The invention relates to the technical field of hull design and particularly discloses a hull surface reconstruction method based on non-uniform rational B-spline surface interpolations. The method comprises the steps of adopting characteristic lines to divide a hull wire-frame model into surface piece grids; conducting homogenization treatment on the surface piece grids to obtain position coordinates of offset points, adding tangent vector characteristics to the offset points and generating non-uniform rational B-spline grids; interpolating B-spline surfaces with multiple nodes into the non-uniform rational B-spline grids to obtain multiple non-uniform rational B-spline surface pieces, and splicing the surface pieces along the characteristic lines among the surface pieces so as to obtain a gapless non-uniform rational B-spline surface and achieve continuous G1 or G0 (knuckle line) on the characteristic lines. Fewer surface pieces (several or dozens of pieces) can be utilized to reconstruct a complicated hull surface and generate the gapless NURBS surface so as to achieve the smooth hull surface effect, and hull surface modification can be facilitated.

The present invention provides a method of combining various types of data and software in order to arrive at a composite graphical representation of a construction site, including surface and subsurface features. A 2-D or 3-D graph of subsurface contoured surfaces is created. A 3-D wire-frame model of surface and subsurface features is created. Aerial photographs of the site can be incorporated and the aerial photographs contoured surfaces and wire-frame model are to produce a complete Visual Reduction Modeling Language (VRML) model of both surface and subsurface features. The VRML model allows the user to identify and visualize a relationship between sub-surface features and above ground features.

The invention relates to a geological map compilation method based on a geological three-dimensional modeling process. The invention aims to provide the geological map compilation method based on the geological three-dimensional modeling process, so as to solve the problems that the geological three-dimensional modeling process and a geological two-dimensional drawing output process are separated, the geological map drawing workload is heavy, the drawing proofreading work cycle is long, the drawing marking and format composing are tedious, the data utilization method is single, the man-made error rate is high, the map interpretation content is inconsistent, the drawing revision and updating are difficult and the like, as well as improve drawing output quality and efficiency of a geological map. The invention adopts the technical scheme that the geological map compilation method is characterized by comprising the steps of: 1, classifying geological objects and defining attributes; 2, setting and storing geological data and geological maps; 3, drawing geological interpretation process maps; 4, compiling the process maps and outputting wireframe models; 5, and outputting the geological maps. The geological map compilation method based on the geological three-dimensional modeling process is applicable to the professional fields of engineering geology in the industries of hydropower, water conservancy, geotechnical, mine, traffic and the like.

The present invention relates to a wire-frame-based curved surface body three-dimensional boundary representation (hereinafter referred to as B-rep) model reconstructing method and a device thereof. A wire frame model of a project mechanical part in a three-dimension modeling system can be transferred into a three-dimensional boundary representation (B-rep) model. The wire frame model which is obtained by reconstructing various kinds of views or CAD software drawings and the wire frame model which is reconstructed by a sketch-based intelligent CAD system can also be transferred into the B-rep model by the method. The method is particularly effective for the wire frame model with high precision and complete geometrical and topological information. The method can be widely applied to the three-dimension reconstructing in a project drawing and the CAD software drawing and can also be applied to the fields of industrial automatic production planning and decision, three-dimensional identification and detection, product data management and data base searches,computer auxiliary design and manufacture, etc.

The invention discloses a three-dimensional target registration positioning method based on a wire-frame model. The three-dimensional target registration positioning method based on the wire-frame model comprises the following steps: carrying out three-dimensional modeling on a three-dimensional target object, projecting to an image plane, carrying out accurate positioning on the three-dimensional target through a Hausdorff distance shape matching algorithm with high anti-noise capability, and finding a three-dimensional model which is most matched with a current three-dimensional target attitude; then, adopting a search algorithm which combines depth-first with breadth-first to track the three-dimensional target, and carrying out real-time pose estimation on a camera; and finally, utilizing obtained camera attitude information to overlap a virtual object in a scene.