31 results about "Surface rendering" patented technology

The invention discloses a three-dimensional visualization head and neck tumor preoperative imaging system based on deep learning. The method comprises the following steps: image analysis and preprocessing; carrying out image denoising and spatial-temporal feature extraction based on a deep learning convolutional neural network architecture, and introducing a u-Net model to realize image segmentation and semantic annotation; performing three-dimensional reconstruction and surface rendering by adopting a Marking Cubes algorithm, and realizing visual interaction image presentation and personalized operation by combining volume rendering and surface rendering; and data is output through multiple ports, and data viewing and interactive operation of a web terminal and a mobile terminal are supported. The method has the advantages that according to the technical scheme, through fusion of a three-dimensional attention mechanism and multi-phase data, the tumor segmentation Dice coefficient reaches 0.92 + / -0.03, and the method is superior to a traditional threshold segmentation method.

The invention belongs to the related technical field of computer vision and three-dimensional reconstruction, and discloses a construction method of a normal vector prediction model based on contact surface rendering and a three-dimensional reconstruction method. The method comprises the following steps that a real image generated when a calibration ball in an actual scene makes contact with a sensor serves as input, normal vectors of all points in a contact area serve as output to train a normal vector prediction model, and the trained normal vector prediction model is the needed normal vector prediction model. Acquiring a real contact image of the object and the sensor in an actual scene, predicting a normal vector of each point on the surface of the contact object by using the normal vector prediction model, and calculating the depth of each point on the surface of the contact object by using the normal vector and the depth prior by taking the image boundary depth as the depth prior. And three-dimensional coordinates of all points on the surface of the contact object are obtained through depth calculation, so that three-dimensional reconstruction of the contact object is realized. According to the invention, the problems of difficult acquisition of a real normal vector and large integral error of the normal vector during calibration are solved.

The invention discloses an end-to-end field optimization surface reconstruction method based on Gaussian sputtering guidance, and belongs to the field of computer vision and computer graphics. Comprising the following steps: 1) Gaussian guidance field optimization: defining an implicit symbol distance field by using a parameterized MLP network, and initializing and optimizing a surface through a microcosmic contour surface extraction method; gaussian units are bound with the extracted surface triangular patches, the positions of the patches are parameterized through the vertexes of the patches, rotation and scaling are carried out, regularization constraints based on the minimum wrapped ellipse and the distribution entropy are introduced, it is ensured that the Gaussian units are accurately attached to the surface and evenly distributed on the surface, and a result obtained through rendering guides field optimization. And 2) local multi-resolution: identifying surface voxels based on the optimized symbol distance field to carry out adaptive octree subdivision so as to realize multi-resolution improvement. And 3) adopting an inner and outer double-layer cyclic training architecture, optimizing the symbolic distance field and the grid geometric parameters on the outer layer, and optimizing a bound Gaussian unit on the inner layer to realize end-to-end joint optimization of surface geometry and Gaussian rendering.

The invention relates to a three-dimensional curved surface rendering method and device, electronic equipment and a storage medium. The three-dimensional curved surface rendering method comprises the following steps: reading road center line information and road edge information; determining the number of shape points required by rendering according to the road center line information and the road edge information; and generating vertexes based on the road center line information, the road edge information and the number of the shape points, and generating a three-dimensional curved surface through vertex rendering. By adopting the three-dimensional curved surface rendering method provided by the embodiment of the invention, the automatic rendering of the three-dimensional curved surface can be realized, the rendering time consumption is effectively reduced, the rendering efficiency is improved, and the cost is reduced.

This invention discloses a method for softening water surface edges and a water system modeling method, belonging to the field of water system modeling technology. The method includes creating an edge-softening texture, with the following steps: calculating the texture size of the water surface; creating a Canvas; drawing the basic water surface outline; and layer-by-layer outlining: S41 Outlining: outlining the water surface outline with black; S42 Color Blending: after each layer of outlining, the black outlining of that layer is blended with the current background color, and the RGBA components of the blended color are calculated; the blended color is then used as the new background color for that area; S43 Repeating steps S141 and S42 until the color blending of the edgeBlur-1 layer is completed; converting the Canvas content into an image texture to generate the edge-softening texture. The advantage of this invention is that by creating an edge gradient texture, a natural transition between the water surface and land is achieved, effectively improving the integration of the water surface with other scene elements, significantly enhancing the realism and immersion of the water surface rendering, and providing a more comfortable and professional user experience.

The application discloses a kind of based on three-dimensional visualization dynamic segmentation double integral teaching demonstration software algorithm, belong to computer-aided instruction technical field.The system includes mathematical modeling module, grid segmentation module, geometry construction module, rendering engine module, calculation analysis module, error visualization module, animation generation module and user interaction module.System is through gradual regional division strategy, the long rectangular cuboid column unit of the rectangular domain on the dynamic segmentation of the curved top cylinder corresponding to the integral function, using transparent curved surface rendering and entity cylinder color coding technology, intuitively show the riemann and approximation process of double integral.System supports multi-angle view angle animation synthesis, real-time calculation and display approximate volume, accurate integral value and error index, solve the technical problem that double integral concept is abstract and difficult to understand in traditional teaching, lack intuitive cognitive tool, significantly improve the visualization effect of mathematical teaching and student's learning efficiency.

The present invention relates to techniques for medical image rendering of optical properties per sampling point. A technique is provided for volume rendering and / or surface rendering of a medical imaging dataset based on optical properties of each sampling point. An uncertainty indicator for each voxel and / or each surface element associated with a segmentation mask of the medical imaging dataset and / or anatomy included in the medical imaging dataset is received. The randomization of the one or more sampling points is scaled based on the received uncertainty indicators, and at least one optical property is determined for each sampling point. The volume is rendered based on the voxels and / or the surface is rendered based on the surface elements. The rendering is based on the determined at least one optical property of each sampling point.

Embodiments of the present application disclose a water surface rendering method, device and equipment and a storage medium. The method comprises: obtaining a basic normal texture; generating at least two derived normal textures according to the basic normal texture; wherein each of the derived normal textures is different; and performing image rendering according to the at least two derived normal textures. According to the technical solution, the efficiency of water surface rendering is considered while avoiding storage of a large number of different normal textures.

The present invention proposes a method for visualizing grinding during surgical navigation, comprising the following steps: acetabular cup model planning, moving the acetabular cup model to a predetermined position of the acetabulum model; grinding image generation, generating a grinding image of the acetabulum model based on the relative positional relationship between the acetabular cup model and the acetabulum model, and layering the grinding image; surface rendering, drawing a mesh surface for the layered grinding image, and assigning different colors to mesh surfaces at different levels. The present invention uses surface rendering to achieve visualization of grinding during surgical navigation, directly using triangular meshes or polygons to represent the surface. This representation method can accurately capture the boundaries and details of anatomical structures. By using lighting and shadow effects, surface rendering can emphasize surface features, making it easier for doctors to identify tissue structures with higher clarity and details.

A method is provided for manufacturing a security document by intaglio-printing a rendering of a three-dimensional object on the security document. The method comprises at least the following: S1) providing a model (1) of the object with a plurality of surfaces (A, B, C, D) in three-dimensional space; S2) attributing, to each point on the surfaces (A, B, C, D), a grayscale or color value; S3) using mapping functions (M) for mapping the surfaces (A, B, C, D) into two-dimensional parameter spaces, thereby defining grayscale or color images (2) in the parameter spaces, wherein the grayscale or color value of each point in said images is given by the grayscale or color of the point on the surface corresponding to the point of the image; S4) rendering, in the parameter spaces, the grayscale or color images (2) as halftone images (3) using halftone patterns, wherein at least some of the halftone patterns are different from each other; S5) using inverses of the mapping functions for mapping the halftone images (3) as textures onto the surfaces (A, B, C, D); S6) projecting the model with the surfaces (A, B, C, D) carrying the textures into a two-dimensional printing plane using a three-dimensional projection (P), thereby projecting said halftone images (3) and textures into the printing plane; S7) rendering, within the printing plane, the surfaces (A, B, C, D) with the textures into a two-dimensional array of printing pixels and forming an intaglio printing plate (5) with recesses corresponding to the array of the printing pixels; and S8) printing, using the intaglio printing plate (5), the rendering of the three-dimensional object onto said security document.

The invention relates to the technical field of real-time rendering in computer graphics, and discloses a high-quality water surface rendering method, which comprises the following steps of: dividing a water surface into grids in a world space, and carrying out randomized disturbance on a rolling phase of a normal diagram by utilizing Hash of grid vertexes to obtain a high-quality water surface; a plurality of normal lines obtained after disturbance are interpolated in grids, a space repetition mode and a time repetition mode are eliminated at the same time from the source, the rendering effect that texture of a large-area water surface is rich and changeable in space and natural and random in time fluctuation is finally achieved, complex resources do not need to be manufactured or parameters do not need to be manually adjusted, and the efficiency is high. The visual reality sense and the development efficiency are greatly improved, and finally the problems of regular texture repetition and periodic dynamic circulation generated when the water surface is rendered through a traditional tiling method map are solved.

The present invention discloses a method, system, and computer program product for rendering a visual representation of a target object using a selection of a first position on a surface of the target object. A reference surface is determined based on the selected position on the surface of the target object. A graphical object covering the visual representation of the target object is rendered. The position of the graphical object in the graphical user interface is based on the reference surface. The graphical object has a perimeter including perimeter positions. The perimeter positions among the perimeter positions are mapped to a second point on a three-dimensional representation of the target object. The distance between a first point and the second point on the three-dimensional representation of the target object is less than or equal to a second distance. The first point on the three-dimensional representation is associated with the first position.

The application provides a virtual object rendering method and device, terminal equipment and storage medium, and relates to the technical field of computers. The method comprises the following steps: determining the corresponding relationship between the first surface parameter of a first virtual object and the second surface parameter of a second virtual object, and the surface of the first virtual object is pre-rendered with a target virtual decoration; determining the first vertex corresponding to a target vertex in the target virtual decoration from the vertex of the first virtual object; determining the second vertex corresponding to the target vertex from the vertex of the second virtual object according to the first vertex corresponding to the target vertex and the corresponding relationship; and rendering the target virtual decoration on the surface of the second virtual object according to the second vertex corresponding to the target vertex. The target virtual decoration can be matched with the first virtual object and the second virtual object, and the virtual decoration with any material can be matched with different virtual objects, so that the application range is wide, and the user experience is improved.

The invention discloses a tsunami pool wave real-time generation method and system based on player interaction, and relates to the technical field of virtual wave generation, and the method comprises the steps: generating an independent wave source descriptor for the physical interaction behavior of each player according to the quantized interaction parameters, and generating a wave source descriptor for the physical interaction behavior of each player according to the wave source descriptors of all players; wave height data at each vertex of the high-resolution physical grid is calculated in parallel by using a graphics processor, a vertex normal vector and a slope value are calculated according to the wave height data of the high-resolution physical grid, and the wave height data, the vertex normal vector and the slope value of the high-resolution physical grid are mapped to a low-resolution water surface rendering grid in an interpolation mode; driving the low-resolution water surface rendering grid to deform, performing illumination rendering on the deformed low-resolution water surface rendering grid, and outputting a rendered picture to a display device; through the virtual wave generation method based on physical interaction, a high-fidelity, low-delay and strong-immersion virtual water surface interaction effect is realized.

The invention discloses an earth surface rendering method and device, computer equipment and a computer readable storage medium, relates to the technical field of image processing, and aims to reduce consumption of rendering resources, reduce memory occupation and rendering pressure, improve rendering flexibility and meet diversified requirements of game rendering while achieving a high-quality rendering effect. The method comprises the following steps: determining a target scene to be subjected to terrain rendering, setting a dynamic texture container in the target scene according to the current position of a player character in the target scene, and setting a created dynamic virtual texture in the target scene according to the dynamic texture container; determining a safe area in the dynamic texture container according to the current position of the player character in the target scene; and obtaining terrain height information of the safe area, performing earth surface rendering on the target scene by adopting the dynamic virtual texture, and performing fusion rendering on the earth surface in the safe area and an object on the earth surface by adopting the terrain height information.

The invention provides a parametric curved surface rendering method and device, equipment, a medium and a program product, which can be applied to the technical field of computer image processing. The method comprises the following steps: acquiring control parameters of parameter curved surface patches to be rendered; linearizing the parametric surface patch according to the control parameter to obtain a linear segment corresponding to the parametric surface patch; performing hardware rasterization on the linear segment to obtain a parameter position initial value of a corresponding point of each screen pixel on the parameter curved surface patch; iteratively solving an accurate parameter position of a corresponding point of each screen pixel on the parameter curved surface patch according to the parameter position initial value; calculating an accurate position and a normal vector of a corresponding point of each screen pixel in a world space according to the accurate parameter position and a parameter expression of the corresponding parameter curved surface patch; and rendering the parametric surface patch according to the accurate position and the normal vector to obtain a target image. The rendering performance can be improved.

The invention provides a simulation and virtual-real interaction method for a composite material robot fiber placement machine, and belongs to the technical field of automatic placement of composite materials. According to the method, a three-dimensional engine architecture is constructed on the basis of OpenGL and C # programming language according to simulation and virtual-real synchronization requirements of a composite robot fiber placement machine in the aircraft manufacturing industry, and orderly execution of model events is realized by adopting a mode of combining a serial process, a queue and recursion; integrating rendering optimization functions of point-line-plane rendering, OBJ model introduction and Von illumination and spotlight superposition; solving forward and inverse kinematics of the six-axis mechanical arm through a geometric method and an analytical method, and driving kinematics simulation of the fiber placement machine; data interaction and virtual-real synchronization of a virtual model and a physical model are realized based on industrial communication protocols such as ModBusRTU, TCP / IP and Siemens S7, and a man-machine interaction platform supporting a manual / automatic mode is established. The method can intervene in laying path and robot posture simulation in advance, safety accidents are avoided, dependence on foreign software is not needed, and the fiber laying efficiency and the intelligent level are improved.

The invention relates to the technical field of medical image processing, in particular to an anterior segment OCT sequence image-based inter-frame registration and three-dimensional drawing method and system, and the method comprises the steps: constructing an anterior segment structure segmentation model, taking an image as input, and outputting the segmentation results of the front and rear surfaces of a cornea; collecting an image and inputting the image into the model, and extracting a cornea contour point set based on a segmentation result output by the model; calculating a horizontal offset amount of the image by using the image registration module, and performing horizontal registration based on the horizontal offset amount; extracting a middle column from the horizontally registered image, combining to form a new image, inputting the new image into the model, generating a longitudinal reference curve based on a segmentation result newly output by the model, calculating a vertical offset of the horizontally registered image, and executing vertical registration based on the vertical offset; and based on the registered image, executing three-dimensional visual drawing in a mode of combining volume rendering and surface rendering to generate a three-dimensional model. According to the invention, the registration precision and the model can be correlated with each other, and the visual accuracy and the structure reduction degree of the three-dimensional model are improved.

The invention belongs to the technical field of vehicle-mounted multi-screen data processing, and provides a virtual machine switching method and device of a vehicle-mounted multi-screen architecture, equipment and a medium, and the method comprises the steps: according to an application picture rendering request event, outputting a picture to a front-row system for display through a front-row virtual machine by adopting a Surface rendering channel; monitoring the use condition of front-row system resources, and if the front-row system resources are lower than a preset value, performing dynamic switching processing of the virtual machine according to the vehicle driving condition; according to the technical scheme, when the back-row virtual machine is started through switching, the picture is output to the front-row display screen through the back-row virtual machine by adopting the Socket channel, the delay during application picture rendering is reduced through the technical scheme, and the utilization rate of system resources is increased.

The invention provides a rendering method and device for a visual interaction effect and electronic equipment, and the method comprises the steps: responding to an interaction behavior between an interaction model in a virtual scene and a target model, and controlling a particle emitter mounted on the interaction model to emit a preset normal map; the normal chartlet comprises normal information representing an interaction effect; rendering the normal map to a preset texture to obtain a target texture, and mixing a normal of the target texture with a vertex normal of the target model to obtain a target vertex normal of the target model; and rendering on the surface of the target model based on the target vertex normal to generate an image representing an interaction effect. In the mode, the normal map is emitted through the particle emitter, the normal map is rendered into the preset texture, and the preset texture is sampled to be mixed with the vertex normal of the target model, so that the water ripple effect can be rendered based on the mixed vertex normal, the implementation process is simple, the performance consumption is low, and a vivid visual effect can be realized; and thus, the compatibility is improved.

The application discloses an ultrasound image rendering method, an ultrasound image rendering device and a storage medium, and relates to the technical field of ultrasound image rendering. The method comprises the following steps: acquiring three-dimensional ultrasound volume data; displaying a light source control sphere model; acquiring light source parameters adjusted by a user based on the light source control sphere model, and rendering and displaying the light source control sphere model according to the adjusted light source parameters; and performing volume rendering according to the adjusted light source parameters and the three-dimensional ultrasound volume data to obtain a volume rendering image. Therefore, the image rendering scheme provided by the application realizes image rendering, such as volume rendering or surface rendering, through different interaction modes, is convenient for users to understand and use, and improves the user experience.

The invention relates to a method, a device, equipment and a product for processing a user interface. The method includes determining a first node based on a node tree of a user interface. The method further includes determining a first sub-tree of the first node in the node tree based on the first node. In addition, the method also includes drawing a first node and a first sub-tree on the first surface. Moreover, the method also includes drawing at least a portion of the other nodes in the node tree, except the nodes of the first sub-tree, on a second surface, the first surface being different from the second surface. Through the method, multi-surface rendering can be realized.

This invention provides a multi-pose guided limb movement video generation method based on a diffusion model, belonging to the field of AIGC video generation technology. It introduces HaMeR hand estimation and a lightweight hand pose guidance network to provide accurate 3D and spatiotemporal features of the hand, improving the quality of hand generation. It simplifies 3D information input through gradient color surface rendering based on the SMPler-X model and incorporates an adaptive pose gating module to achieve adaptive learning through multi-condition fusion, improving the stability and overall quality of human body generation. It adopts an end-to-end single UNet architecture and a lightweight pose guidance network to simplify model training and efficiently convey pose information. Finally, it constructs a distributed data processing pipeline based on the Ray framework to accelerate dataset preparation.

A technique for volume rendering, and / or surface rendering, of a medical imaging data set based on optical properties per sampling points is provided. An uncertainty indicator per voxel, and / or per surface element, in relation to a segmentation mask of, and / or an anatomical structure comprised in, a medical imaging data set is received. A randomization of one or more sampling points is scaled based on the received uncertainty indicator, and at least one optical property per sampling point is determined. A volume based on the voxels, and / or a surface based on the surface elements is rendered. The rendering is based on the determined at least one optical property per sampling point.

A technique for rendering is provided. The technique includes obtaining one or more samples for a pixel, the samples obtained for a microfacet surface from a spherical cap cut off by a lower plane positioned to exclude reflected rays that are occluded by the microfacet surface; obtaining one or more contributions corresponding to the one or more samples; determining a color for the pixel based on the one or more contributions.

A three-dimensional scene inverse rendering and reconstruction method using near-field and far-field light sources belongs to the field of three-dimensional reconstruction technology, and includes: obtaining appearance images of the same object under different viewpoints and different light source conditions as input images, and annotating the input images to obtain camera poses; modeling the scene shape, material, radiation field and light source; reconstructing the scene shape field and radiation field based on volume rendering; reconstructing the scene material field and light source based on surface rendering; constructing and exporting a three-dimensional model with materials. The present invention uses all far-field and near-field light source conditions including ambient light sources contained in the input images to perform disambiguation between the light source and the material, can more effectively utilize controllable light sources and different ambient light source conditions, and obtain a more refined and accurate object material reconstruction; at the same time, uses a more advanced multi-resolution hash grid position encoding as the representation method of the neural field, and performs a faster three-dimensional inverse rendering and reconstruction of the scene without reducing the quality.

A system and method for volume rendering a light field, wherein the light field data is subjected to a layering scheme introducing a partitioning of the hogels into subsets. Each subset corresponding to a sub-volume of the layer volume, corresponds to the sub-region of the layer. Novel partitioning of the data combined with an efficient local memory caching technique, plenoptic downsampling strategies to reduce memory bandwidth requirements and volume rendering algorithm to produce a rendered light field image. A reduction in the total number of samples required can be obtained while still maintaining the quality of the resulting image. A method is also provided to order memory accesses aligned with ray calculations in order to maximize access coherency. Real-time layered scene decomposition can be combined with surface rendering method to create a hybrid real-time rendering method that supports rendering of scenes containing superimposed volumes and surfaces.

The application provides a method and system for fusing irregular geological anomaly bodies with three-dimensional geology, which utilizes half-edge rules to perform surface rendering on a predicted body predicted by a three-dimensional point cloud; utilizes an octree to construct a three-dimensional geological hexahedron grid; obtains a directional bounding box of a three-dimensional surface formed by surface rendering and acquires a hexahedron inside the directional bounding box; judges whether all hexahedrons intersect with the three-dimensional surface, and determines all intersected hexahedrons; performs a polyhedral Boolean operation on all intersected hexahedrons and the three-dimensional surface; and fuses the polyhedral Boolean operation result into the three-dimensional geological hexahedron grid. The application can quickly fuse advanced detection results into front three-dimensional geology in tunnel excavation construction, and more intuitively display the display fidelity of geological anomaly bodies in front strata.

Embodiments of the present application disclose a model automatic generation method and device, computer equipment and a storage medium. The method comprises: obtaining a sketch image used for generating a target model and a model map of the target model, the sketch image comprising at least two model views of the target model obtained from different viewing angles; creating a model plane corresponding to each model view in a three-dimensional space based on each model view; adjusting the relative positions of the model planes based on the viewing angles of each model view, so that the relative positions between the model planes match the relative positions of each model view on the target model; generating intersecting silhouette models in the three-dimensional space according to the relative positions of each model plane and each model plane, obtaining an intersection part of each silhouette model to form an intersection model; cutting the intersection model to determine the vertex texture coordinates of the cut intersection model; and rendering the corresponding model map on the surface of the intersection model based on the vertex texture coordinates to form the target model.