76 results about "Polygon mesh" patented technology

A bitstream that includes coded information of a mesh is received. The mesh includes a plurality of vertices. Whether a current vertex of the plurality of vertices is a pivot vertex is determined based on a priority of the current vertex in the plurality of vertices. The current vertex includes a plurality of incident faces. The priority of the current vertex is determined based on a total number of already visited incident faces of the plurality of incident faces of the current vertex. One or more unvisited incident faces of the plurality of incident faces of the current vertex are reconstructed when the current vertex is determined as the pivot vertex.

This disclosure provides methods, devices, and systems for planning and performing medical procedures. The present implementations more specifically relate to analyzing objects in 3D images. In some aspects, a segmentation system may receive image data representing a 3D image of an anatomy, select a seed location for a target in the 3D image, and infer a segmentation mask associated with the seed location from at least a portion of the received image data based on a neural network model trained to segment a class of objects associated with the target. The system further extracts a polygon mesh from the segmentation mask to produce a 3D model of the target. The system can determine a spatial relationship between an instrument and the target based on a position of the 3D model relative to the 3D image. The system can also estimate a geometry of the target based on the 3D model.

Apparatuses, systems, and techniques to generate a 3D mesh using one or more neural networks. In at least one embodiment, tokens of a sequence of tokens that represents a sequence of coordinates of vertices of polygons of a polygon mesh are generated autoregressively using one or more neural networks based on a 3D representation of an object and one or more attributes. In at least one embodiment, the sequence of tokens includes start-of-part and end-of-part tokens that separate vertex coordinates corresponding to a part of the 3D representation of the object. In at least one embodiment, the one or more neural networks are trained via a progressive training technique that employs iterative vocabulary expansion and fine-tuning.

A method of mesh processing includes receiving coded information of a mesh, the coded information including position connectivity of a plurality of 3D vertices of a mesh in a 3D space, and a correspondence of the plurality of 3D vertices to UV vertices in a UV space for the mesh; determining UV connectivity of the UV vertices; determining, based on the coded information, a first initial UV vertex in a first UV chart in the plurality of UV charts; determining first UV vertices in the first UV chart according to a traversing order of 3D vertices corresponding to the first UV vertices in the first UV chart, the traversing order starting from the first initial UV vertex and traversing each UV vertex in the first UV chart; decoding, from the coded information, prediction residuals of the first UV vertices; and determining first UV coordinates of the first UV vertices accordingly.

The invention relates to the technical field of medical image calculation, in particular to a heart three-dimensional polygon mesh construction method and system, and the method comprises the steps: firstly obtaining and registering an image, generating an inductor density and a signed distance field based on boundary features, and fitting anatomic anchor points; determining a patient specific three-dimensional domain through mass conservation transmission and homeomorphic deformation; constructing pull-back measurement in the domain, solving three groups of harmonic functions, extracting contour surfaces according to common area constraint, and intersecting to form a network; deformation and harmonic functions are taken as joint unknown quantities, synchronous optimization is carried out in combination with pixel consistency, physical consistency and topological consistency, and the density of the inducer is re-weighted by layer area deviation feedback until convergence. According to the method, the surface net with consistent anatomy, controlled topology and balanced layer is output, and the method is adaptive to diagnosis, treatment and simulation application.

The invention provides a touch panel. The touch panel comprises a substrate, a first metal layer and a second metal layer, the first metal layer is arranged on the substrate and comprises a plurality of first polygonal meshes, wherein the length of each first polygonal mesh in the first direction is larger than the width of each first polygonal mesh in the second direction. The second metal layer is arranged on the substrate and comprises a plurality of second polygonal meshes, wherein the length of each second polygonal mesh in the second direction is larger than the width of each second polygonal mesh in the first direction.

This invention discloses a charging station information processing method, display method, device, system, and storage medium. The method includes: acquiring an initial map containing charging station information; generating a polygonal grid for the initial map, wherein each polygonal grid contains charging station information for at least one charging station; filtering the charging station information in the polygonal grid based on the correlation between preset point positions and the positions of charging stations in the polygonal grid to generate display data for each polygonal grid; and sending the display data to a vehicle-mounted system for generating a charging station display layer when the vehicle-mounted system displays the map. The technical solution of this invention minimizes data loading and reduces the performance consumption of the vehicle-mounted system while ensuring a good user experience.

Some aspects of the disclosure provide a method of mesh decoding. In some aspects, a bitstream is received, the bitstream includes coded information of a polygon mesh, the polygon mesh includes a plurality of vertices that are connected into faces. One or more syntax elements are obtained from a header for at least a portion of the polygon mesh, the one or more syntax elements indicate face information and / or vertex information for at least the portion of the polygon mesh. Connectivity information of the portion of the polygon mesh is determined based on the one or more syntax elements; and the polygon mesh is reconstructed based on at least the connectivity information of the portion of the polygon mesh.

Computing an image depicting a face having an expression with wrinkles is described. A 3D polygon mesh model of a face has a non-neutral expression. A tension map is computed from the 3D polygon mesh model. A neutral texture, a compressed wrinkle texture and an expanded wrinkle texture are computed or obtained from a library. The neutral texture comprises a map of the first face with a neutral expression. The compressed wrinkle texture is a map of the first face formed by aggregating maps of the first face with different expressions using the tension map, and the expanded wrinkle texture comprises a map of the first face formed by aggregating maps of the first face with different expressions using the tension map. A graphics engine may be used to apply the wrinkle textures to the 3D model according to the tension map; and render the image from the 3D model.

The invention relates to calculating the priority of active vertices in polygon mesh compression. Receiving a code stream comprising encoded information of a grid, the grid comprising a plurality of vertices; determining whether a current vertex in the plurality of vertexes is a pivot vertex based on a priority of the current vertex in the plurality of vertexes, the current vertex comprising a plurality of adjacent surfaces, the priority of the current vertex being determined based on a total number of accessed adjacent surfaces in the plurality of adjacent surfaces of the current vertex; when the current vertex is determined as the pivot vertex, one or more unaccessed contiguous surfaces of the plurality of contiguous surfaces of the current vertex are reconstructed.

A method, system, and apparatus, including a computer program encoded on a computer storage medium, for generating data for a three-dimensional mesh of a specified object using an autoregressive neural network.

A method of generating a three-dimensional (3D) model includes obtaining a set of two-dimensional (2D) images of a scene acquired by one or more cameras from a set of camera angles and camera positions, obtaining the set of camera angles and camera positions based on obtaining, for each 2D image in the set of 2D images, a respective camera angle and a respective camera position for the 2D image, training a neural radiance field (NeRF) model, using the set of 2D images and the set of camera angles and camera positions as a training dataset, to obtain a trained NeRF model, generating a set of 2D depth maps based on the trained NeRF model, and generating a 3D polygonal mesh representing at least one object of one or more objects in the scene based on the set of 2D depth maps.

This disclosure provides methods, devices, and systems for planning and performing medical procedures. The present implementations more specifically relate to analyzing objects in 3D images. In some aspects, a segmentation system may receive image data representing a 3D image of an anatomy, select a seed location for a target in the 3D image, and infer a segmentation mask associated with the seed location from at least a portion of the received image data based on a neural network model trained to segment a class of objects associated with the target. The system further extracts a polygon mesh from the segmentation mask to produce a 3D model of the target. The system can determine a spatial relationship between an instrument and the target based on a position of the 3D model relative to the 3D image. The system can also estimate a geometry of the target based on the 3D model.

A method performed by at least one processor in an encoder includes receiving a polygon mesh comprising a plurality of vertices; predicting a vertex using an original vertex from the plurality of vertices; determining a residual between the predicted vertex and the original vertex; determining a residual context from a plurality of residual contexts; encoding the residual between the predicted vertex and the original vertex using the residual context; generating a bitstream including (i) the encoded residual, and (ii) a plurality of indexes identifying the residual context including (a) three indexes from the plurality indexes when the residual is associated with a geometric position of the predicted vertex, and (b) two indexes from the plurality of indexes when the residual is associated with an attribute of the predicted vertex.

The embodiment of the invention discloses a video coding method and device, a video decoding method and device, a code stream, computer equipment and a storage medium. The video coding method comprises the following steps: receiving a polygon mesh, wherein the polygon mesh comprises a plurality of vertexes; predicting a vertex by using an original vertex in the plurality of vertexes; determining a residual error between the predicted vertex and the original vertex; determining a residual context from the plurality of residual contexts; encoding the residual using the residual context, and determining a plurality of indices identifying the residual context, where (a) when the residual is associated with a geometric position of the predicted vertex, the plurality of indices includes three indices; (b) when the residual is associated with an attribute of the predicted vertex, the plurality of indices comprises two indices.

We propose a technology to further improve heat dissipation from the case. [Solution] The motor has a case with ribs on its outer surface. The ribs have a first portion and a second portion that protrudes less from the outer surface than the first portion. The first portion extends in a polygonal grid pattern, and the second portion is adjacent to the first portion and extends along the first portion. Since the ribs provided on the motor case have a first portion with a large protrusion and a second portion with a small protrusion, heat can be efficiently dissipated from the case.

A method of encoding includes receiving a polygon mesh comprising a plurality of faces and a plurality vertices; separating the polygon mesh into a left side half mesh and a right side half mesh by a plane; extracting the left side half mesh comprising a first plurality of vertices in-plane and on a left side of the polygon mesh; remapping the plurality of faces to represent a new vertices order in order to generate a plurality of remapped faces; extracting the plurality of remapped faces; compressing the left side half mesh by a codec; predicting a location of a second plurality of vertices on the right side half mesh using a symmetry based prediction on the compressed left side half mesh; and connecting the left side half mesh and the right side half mesh.

A multilayer optical sheet has multiple polygonal grid cells 20 and includes a substrate 10, a multilayer film 30 and two anti-fouling and water-repellent layers 40. The multiple polygonal grid cells and multilayer film are formed through vacuum coating on one surface of the substrate and by alternately stacking multiple high refractive index materials and multiple low refractive index materials. The multiple polygonal grid cells resist glare and block scattered light and also provide a light supplementing effect to shorten light and dark adaptation periods for eyes. The multilayer film is formed on a surface of the substrate opposite to that of the multiple polygonal grid cells and blocks ultraviolet, violet and blue light of 280-500nm and near infrared light in the waveband of 760-2000nm. The two anti-fouling and water-repellent layers are formed through vacuum coating by attaching a water-repellent agent to the outside of the multiple polygonal grid cells and the multilayer film. The multiple polygonal grid cells are therefore enclosed by one of the anti-fouling and water-repellent layers. The substrate and multilayer film is then sandwiched between another one of the anti-fouling and water repellent layers and the substrate. [Figure 1]

A multilayer optical sheet comprises a substrate (10), a plurality of polygonal grid cells (20), a multilayer film (30), and two antifouling and water-repellent layers. The cells (20) are formed on one surface of the substrate (10) by alternately stacking a plurality of high-refractive-index materials and a plurality of low-refractive-index materials. The film (30) is formed on a surface of the substrate (10) opposite the plurality of cells (20) by alternately stacking a plurality of high-refractive-index materials and a plurality of low-refractive-index materials. The two antifouling and water-repellent layers are formed on two sides of the substrate (10) to enclose the plurality of cells and the film (30) within them. Figure 1

Embodiments of the present application disclose a virtual scene model processing method and device, computer equipment and a storage medium. At least one target virtual scene model is obtained from a preset virtual scene space. Polygon meshes of the target virtual scene model are decimated based on a preset decimation parameter to obtain a processed virtual scene model. A target physical resource with a target physical function is generated based on a preset physical attribute parameter and the processed virtual scene model. The target physical resource is mounted to the target virtual scene model to obtain a target virtual scene model with the target physical function. After the polygon meshes of the target virtual scene model are decimated, the output is input into a game engine where the target virtual scene model is located to reference a physical resource, thereby automatically generating physical resources for multiple virtual scene models, improving physical interaction performance, and improving the efficiency of setting physical resources for virtual scene models.

The invention relates to a multilayer optical disk with a plurality of polygonal meshes, comprising a substrate, a plurality of polygonal meshes, a multilayer film, and two dirt- and water-protection layers. The polygonal meshes are formed on one side of the substrate by alternating stacking of a plurality of materials with a high refractive index and a plurality of materials with a low refractive index. The multilayer film is formed on the side of the substrate facing away from the polygonal meshes by alternating stacking of a plurality of materials with a high refractive index and a plurality of materials with a low refractive index. The two dirt- and water-protection layers are applied to both sides of the substrate to cover the polygonal meshes and the multilayer film.This allows the invention to effectively resist glare and block scattered light, and it exhibits a light compensation effect, thus reducing the time required for the eyes to adapt to brightness and darkness. Furthermore, the invention can more effectively block ultraviolet, violet, blue, and near-infrared light while maintaining high transmittance of visible light.

The invention discloses a surface water and underground water tight coupling model, a construction method, a server and a storage medium, and the method comprises the steps: firstly, carrying out the discretization of an underground water flow control equation through theoretical derivation through employing a multi-point flux approximation method (MPFA), and carrying out the discretization of a surface water flow control equation (Saint-Venant equation set) through employing a finite difference method; obtaining a numerical discretization format suitable for any polygon mesh generation; basic data such as grid nodes, hydraulic parameters and boundary conditions are read; building underground water and surface water matrix equations and coupling the matrix equations into an overall matrix equation; and solving the overall equation through iteration, judging convergence according to an error threshold value, outputting surface water and underground water levels after convergence, and updating a water head value to repeat iteration if convergence is not performed. The method supports arbitrary polygon mesh generation, improves mesh adaptability, realizes tight coupling of surface water and underground water, obviously improves simulation precision, and provides scientific support for water environment resource management and pollution control.

An augmented reality (AR) system includes a data generator configured to generate three-dimensional (3D) data corresponding to a press mold product, and an AR terminal configured to convert the 3D data into AR data. The AR terminal includes a data inputter configured to receive the 3D data and display information corresponding to location information of each node of the 3D data. The AR terminal also includes a data processor configured to convert the 3D data into a form of polygon mesh according to a type of form information of the 3D data and generate AR data in a form of 3D virtual model through matching with the display information. The AR terminal additionally includes a data augmentation part configured to augment and match the AR data on a real product displayed on a camera image, and augment and display the display information for each node, through a user interface (UI).

A method for predicting a recurrence of atrial fibrillation by an apparatus comprising a processor and a memory, according to an embodiment of the present invention, comprises the steps of: (a) generating target data including any one or more of geometric topological data, anatomical data, and electrophysiological data of the atrium of a patient; (b) preprocessing the generated target data; and (c) inputting the preprocessed target data into a prediction model to calculate and output a prediction value of a recurrence of atrial fibrillation for the patient and to learn the prediction value, wherein the target data is defined as a plurality of vertices and edges and is data having a basic structure of a three-dimensional polygon mesh including a plurality of triangular faces, which are minimum units of faces including the vertices and edges.

The present invention relates to a method for generating a three-dimensional digital model of a drill core, comprising the steps of positioning at least one drill core fragment in an acquisition scenario; capturing images of the drill core fragment; generating a mask for each captured image; reconstructing the position and angle of the image; generating at least one dense point cloud; generating at least one polygonal mesh; georeferencing the drill core fragment; performing texture processing; and unifying a plurality of drill core fragments into a single three-dimensional object.

The invention relates to the technical field of computer aided design, in particular to a mesh generation and field flat calculation method and system for block centroid control. The method comprises the following steps: drawing a digital elevation model according to topographic data, and generating a polygonal DEM topographic surface according to the digital elevation model; determining the size and the distribution mode of the polygonal mesh, and drawing the polygonal mesh; on the basis of the range of each polygon in the polygonal mesh, performing digging and filling amount trial calculation on the polygonal DEM terrain surface, and calculating a polygonal field flat elevation during digging and filling balance; calculating centroid coordinates of each polygon according to the field flat elevation of the polygon and the plane coordinates of each polygon; generating a field-level digging and filling balance surface; and generating a field flat excavation cube and a filling cube by utilizing the excavation and filling balance surface and the polygonal DEM terrain surface and adopting a three-dimensional modeling volume calculation method, and calculating the excavation amount and the filling amount. According to the method, original topographic data are fully utilized, excavation and backfill design models can be established and adjusted according to needs, and the calculation precision and efficiency are high.

The invention relates to a coverage path planning method based on a polygonal mesh model surface, a medium and equipment, and the method comprises the steps: obtaining a boundary chain of a model target surface, and obtaining a plurality of boundary vertexes and a connection sequence thereof; determining a plurality of segmentation starting points according to the set initial starting point, the set index spacing and the connection sequence of the boundary vertexes so as to obtain segmentation lines corresponding to the segmentation starting points; acquiring a plane normal vector and a tangent plane at the segmentation starting point and the segmentation ending point of each segmentation line so as to construct a parameter curve model corresponding to each segmentation line; and projecting the parameter curve models to the surface of the model and sequentially connecting the parameter curve models to obtain a complete coverage path of the target surface. The problems that in the prior art, pretreatment is complex, adaptability is poor, and high-precision and high-flexibility industrial machining requirements cannot be met are solved.

The utility model belongs to the technical field of unmanned aerial vehicles, and particularly discloses an unmanned aerial vehicle outer protection structure which comprises a protection cover and an unmanned aerial vehicle body arranged on the inner side of the protection cover, and the protection cover comprises a supporting assembly and protection net assemblies arranged above and below the supporting assembly; the supporting assembly comprises an annular supporting plate, a mounting plate is fixed to the inner side of the annular supporting plate, a covering edge is fixed to the outer side of the annular supporting plate, the supporting assembly is connected with the unmanned aerial vehicle body through the mounting plate, and the covering edge plays a certain buffering role; the protective net assembly comprises a plurality of buffer blocks and a plurality of protective connecting rods, the protective connecting rods are connected between the adjacent buffer blocks, a polygon is formed between the buffer blocks and the protective connecting rods which are connected with each other, and the protective net assembly is formed by arranging the buffer blocks and the protective connecting rods, so that the effect of protecting the unmanned aerial vehicle body is achieved; impact force is dispersed through geometric deformation of the polygonal grid structure, and damage of instant impact to a machine body is reduced in combination with sliding unloading force of the balls.

This system provides a mechanism for deforming objects with a high degree of freedom in games using voxels. [Solution] An example of an information processing system stores first volume data representing terrain objects and containing multiple voxel data in a first voxel space, and second volume data representing enemy objects and containing multiple voxel data in a second voxel space. When a destruction action is performed on a terrain object, the voxel data of voxels included in a first range of the first volume data is updated, and when a destruction action is performed on an enemy object, the voxel data of voxels included in a second range of the second volume data is updated. A polygon mesh is created based on the first volume data and the second volume data.

A multilayer optical sheet includes a substrate, a plurality of polygonal grid cells, a multilayer film, and two anti-fouling and water-repellent layers. The plurality of polygonal grid cells are formed on a surface of the substrate and are formed by alternately stacking a plurality of high refractive index materials and a plurality of low refractive index materials. The multilayer film is formed on a surface of the substrate that is opposite to the plurality of polygonal grid cells and is formed by alternately stacking a plurality of high refractive index materials and a plurality of low refractive index materials. The two anti-fouling and water-repellent layers are formed on two sides of the substrate to enclose the plurality of polygonal grid cells and the multilayer film inside thereof. A manufacturing method includes providing a substrate, coating photoresist, exposing, developing, vacuum coating, stripping photoresist, and coating anti-fouling and water-repellent layers.