129 results about "Computer graphics" patented technology

This invention relates to the fields of computer vision and computer graphics, and provides a method and system for dynamic human body reconstruction from monocular video based on 3D Gaussian splashing. The method includes the following steps: data preprocessing; initialization of the normalized space 3D Gaussian; deformation of the normalized space 3D Gaussian to an intermediate pose space to obtain a non-rigidly deformable 3D Gaussian and pose-related features; transformation of the non-rigidly deformable 3D Gaussian to the observation space using linear blending skinning to obtain the observation space 3D Gaussian; decoding the viewpoint-related color based on Gaussian color features, pose-related features, and viewpoint direction; constructing a total loss function including a normal consistency regularization term to optimize the 3D Gaussian attributes and network parameters; and rendering the target human body image using a differentiable Gaussian splash rasterizer. This invention enables rapid and fully automatic reconstruction from monocular video to a high-fidelity, animable human body model, applicable to fields such as virtual reality and film production.

This invention discloses a method, device, medium, and system for generating and using 3D character culling data in computer graphics, belonging to the field of computer graphics. The method includes the following steps: pre-generating frame-level cluster bounding box data corresponding to sampled animation frames; submitting the frame-level cluster bounding box data to the graphics processing unit of the graphics card during initialization; updating the current animation frame using an animation state machine during runtime; during the culling operation, searching for the bounding box data of the cluster in the current animation frame based on the current animation frame and the cluster index, and culling it; if the current animation frame does not match the sampled animation frame, interpolating and calculating the bounding box data corresponding to the current animation frame based on the pre-generated frame-level cluster bounding box data of the animation frames before and after the current animation frame. This invention has advantages such as low overhead, good dynamics, and high culling performance.

An image data generation device includes a target object acquisition unit configured to acquire a learning target object created as computer graphics (CG), a virtual space generation unit configured to generate a virtual space in which the learning target object is disposed, a background setting unit configured to set a background image captured in a physical space as a background in the virtual space, and an image data generation unit configured to generate image data by using a captured image obtained by imaging the learning target object disposed in the virtual space.

This invention relates to the field of computer graphics data processing technology, specifically a method for hot-plugging dynamic outer contour meshes driven by three-dimensional spatial domain and time slices. The steps include: S1, receiving air traffic control message information in real time via a transmission protocol, converting geographic coordinates into target world coordinates, and simultaneously generating management files; S2, constructing a spatial domain mesh in real time based on the four types of management files using a combination of outer contour extrusion and ear-cutting methods; S3, mapping the spatial domain ID and time slice from the message to the spatial domain mesh constructed in S2, constructing a double-key hash index of spatial domain ID and time slice, which serves as the sole basis for the hot-plug manager to determine whether to update or create a mesh, dynamically executing spatial domain mesh hot-plugging. Employing the contour extrusion-ear-cutting method and vertex cache reuse mechanism, combined with the "spatial domain ID and time slice" double-key hash index, it supports dynamic construction and hot-plugging operations of the mesh model, meeting the low-latency rendering requirements of real-time air traffic control data.

This disclosure relates to techniques for manipulating computer graphics objects. The invention discloses a computer-generated virtual object manipulator having one or more power representations for manipulating computer-generated virtual objects. Selection of a virtual object causes the object manipulator to be displayed above the virtual object. The object manipulator may include a conical single-axis translation power representation for each of the one or more object axes, a disk-shaped single-axis scaling power representation for each of the one or more object axes, an arc-shaped rotation power representation for rotation about each of the one or more object axes, and an object center power representation for free-space movement of the virtual object. The object manipulator may also include a slice-shaped dual-axis translation power representation, which may be displayed after hovering over an area in a specific plane.

The utility model discloses a computer display card plug -pull test device, include: base, its top fixedly connected with left side, bottom and front side are all open setting's fender shield, PLC controller, fixed mounting on the top inner wall of fender shield, the utility model discloses a series of structures are set up, and the computer display card and display card socket of different width and length are placed and fixed to the mode of being protruding to the outside through the side opening conveniently, avoid the phenomenon of the impact damage when pulling test under a certain transverse interval because of the computer display card too wide, improve applicability and safety, and convenient drive computer display card reciprocating transverse movement carries out the plug -pull test and counts and shows the plug -in frequency, and can reach the preset count number when automatic stop plug -pull test work, realize the effect of automatic accurate control plug -in frequency, further improve the use convenience and test work accuracy.

The application provides a dynamic anti-aliasing rendering method and system based on edge detection and motion perception, and relates to the technical field of computer graphics rendering. The method comprises the following steps: performing 8-direction edge intensity detection on a pixel point in an original scene image by using a 3*3 sampling matrix and calculating an edge intensity value; calculating a motion factor and dynamically adjusting an edge detection threshold; if the edge intensity value of the pixel point is greater than the edge detection threshold, performing adaptive blur processing based on a 9-point weighted average algorithm to generate a blurred pixel value, calculating a mixing factor, mixing the original pixel value of the pixel point and the blurred pixel value to generate a final pixel value; if the edge intensity value of the pixel point is less than or equal to the edge detection threshold, keeping the original pixel value of the pixel point unchanged, and the final pixel value is the original pixel value, and finally outputting a final scene image by collecting the final pixel value, so that the anti-aliasing processing strategy can be adaptively adjusted according to the static and dynamic characteristics of the scene, the rendering performance is optimized while the image quality is ensured.

This application discloses an adaptive error correction method for cloth penetration, its system, electronic device, and storage medium, relating to the field of computer graphics processing technology. The method includes: when simulating the current frame image, performing physical calculations on the acquired initial data of the current frame image and the first simulation result of the previous frame image to obtain the initial physical simulation position of each cloth vertex in the current frame image; determining the penetration status of each cloth vertex by performing a heuristic detection-based state judgment based on the initial physical simulation position and character skeleton data; performing adaptive error correction compensation based on the penetration status of each cloth vertex and the initial physical simulation position to obtain the target physical position of each cloth vertex; and performing rendering simulation based on the target physical position of each cloth vertex to output a second simulation result of the current frame image. This method can improve penetration detection efficiency, reduce penetration detection cost, and improve the real-time simulation effect of cloth.

This invention relates to the field of computer graphics processing and 3D modeling technology, specifically to an automated intelligent generation system for 3D modeling of shoe exteriors. The system includes: data acquisition and streaming, where an image acquisition terminal generates and sends four-channel image data using a high-precision sensor array; feature reconstruction and representation, where a topological semantic reconstruction server extracts semantic features and constructs an initial geometric representation using an implicit function based on pixel alignment and a decoder to predict the symbolic distance function; topology optimization and segmentation, where topological streamline optimization and component semantic segmentation are performed based on the curvature field to generate a structured 3D model with independent component structures; and interaction and local updates, where an interactive terminal responds to user editing operations on independent component structures, sending local topology update commands, and the server performs parametric recalculation of the local mesh based on the commands. This invention solves the problem of the separation between geometric structure and semantic information, achieving real-time and refined model updates.

The application provides a three-dimensional part retrieval method based on graph similarity search, relates to the field of computer graphics, and solves the technical problem that the prior art cannot fully utilize the geometry and design semantic information of CAD, and it is difficult to capture and display the topological relationship, resulting in low retrieval efficiency. The method comprises the following steps: obtaining part three-dimensional data of a computer-aided design (CAD) model, and constructing a training data set; constructing an edge-face connection graph based on the part three-dimensional data; calculating a graph edit distance (GED) matrix of all edge-face connection graphs in the training data set as a supervision signal; training a ranking model based on the GED matrix, mapping the edge-face connection graph to a hidden space, and constructing a part vector database according to the output graph-level embedding vector; the ranking model is constructed based on a graph attention network; inputting a CAD part to be queried into the trained ranking model to obtain a feature vector, performing nearest neighbor search in the part vector database, and returning a similar part result.

The application relates to a WebGL-based three-dimensional local terrain protrusion weakening method, and belongs to the technical field of computer graphics visualization, which comprises terrain grid loading, loading terrain data in the form of a grid into a scene in a WebGL rendering engine, storing information in the form of a.terrain format binary file, then performing grid analysis, loading block terrain data according to a terrain level of detail strategy, analyzing terrain data, loading and analyzing downloaded binary file data according to terrain grid levels and row and column numbers, compressing the data by using a zig-zag coding method, then performing vertex height dynamic adjustment, and finally performing terrain triangular net reconstruction. The WebGL-based three-dimensional local terrain protrusion weakening method can weaken terrain protrusion problems by modifying the vertex elevation of a terrain data-free area, does not cause distortion of local high-precision terrain and models in a scene, can weaken terrain cliff problems existing in three-dimensional local terrain protrusions, and does not deform the terrain and models in the scene.

The application relates to a fluid simulation method and device, and relates to the technical field of computer graphics. The method comprises the following steps: setting one or more disturbance packages in a space where a fluid object is located, each of the one or more disturbance packages comprising at least one fluid particle, and the initial velocities of the fluid particles in the same disturbance package being the same; and updating the initial velocities of fluid particles outside the one or more disturbance packages according to the gravitational action of the fluid particles in the one or more disturbance packages on the fluid particles outside the one or more disturbance packages.

Apparatuses, systems, and techniques to render computer graphics. In at least one embodiment, a first one or more lights are selected from among lights in a virtual scene to be rendered as a frame of graphics, and a second one or more lights are selected from among lights used to render one or more pixels in at least one of a prior frame or the current frame. A pixel of the current frame is rendered using the first and second one or more lights, and a light is selected for reuse in rendering a subsequent frame from among the first and second one or more lights.

The application provides an intelligent video color grading method and device based on LUT replication, merging and evaluation, a storage medium and an electronic device, relates to the field of computer vision and computer graphics, and the method comprises the following steps: performing shot segmentation on a video before and after color grading and extracting key frames; extracting feature vectors based on the key frames and merging the same type of shots; replicating the LUT of the same type of shots; training a LUT evaluation network model based on the key frames before color grading and the feature vectors of the LUT images applied to the key frames before color grading; and recommending LUT for a new video shot by using the trained LUT evaluation network model. The application realizes the whole process of LUT replication, merging and evaluation, provides a solution of intelligent LUT recommendation and color grading for the same type of video shots, and reduces the labor cost of video production.

The invention discloses a complex-material-oriented multi-path full-frequency global illumination neural rendering method and system, and belongs to the technical field of computer graphics, and the method comprises the steps: carrying out the scene query of light emitted by pixels, and obtaining a primary geometric buffer and a multi-path mixed geometric buffer of the multi-time ejection of the light; respectively extracting main frequency features and multi-path sub-frequency features in a neural feature field based on the two features; performing directed graph structured modeling based on the multi-path sub-frequency features to obtain propagation features representing light path propagation information and global features representing overall light path information; performing multi-path frequency joint feature fusion based on the dominant frequency feature, the propagation feature and the global feature to generate a fusion feature with a full-frequency feature; and estimating a final radiation brightness value of the pixel based on the fusion feature, and completing neural rendering of global illumination. According to the method, efficient modeling and high-quality drawing of multi-path full-frequency global illumination under a complex material can be realized, and the sense of reality and dynamic consistency of a rendered image are remarkably improved.

Fluid simulation methods and apparatuses, relating to the technical field of computer graphics. A method comprises: providing one or more perturbation packets in a space where a fluid object is located, wherein each of the one or more perturbation packets comprises at least one fluid particle, and the initial velocities of fluid particles in the same perturbation packet are the same; and, on the basis of the attractive effect of fluid particles in the one or more perturbation packets on fluid particles outside the one or more perturbation packets, updating the initial velocities of the fluid particles outside the one or more perturbation packets.

To address the problems of semantic structure destruction, geometric feature distortion, and difficulty in controlling multi-level errors in the LOD simplification process of existing 3D models, this application discloses a static LOD processing method, device, and storage medium for urban digital twin scenes, belonging to the field of computer graphics and 3D modeling technology. The method includes: semantic recognition and region division of the urban building 3D mesh model to construct a semantically labeled mesh; establishing a simplification control model based on the semantically labeled mesh and determining simplification constraints; performing mesh simplification processing under constraints; preserving geometric features of the simplification results; evaluating errors in each LOD level model and performing adaptive correction; and replacing semantic components that cannot be preserved to generate multi-level LOD model data. This application reduces model complexity while achieving the coordinated preservation of semantic consistency and geometric accuracy, making it suitable for efficient rendering and visualization applications of urban-level 3D scenes.

A rendering method, device and equipment of a three-dimensional model and a storage medium, relate to the technical field of computer graphics. The method comprises: obtaining vertex data sets and index data sets of at least two three-dimensional models in a three-dimensional model sequence, the vertex data set of a three-dimensional model being used to describe at least one vertex of the three-dimensional model, and the index data set of the three-dimensional model being used to indicate a connection relationship between at least one vertex of the three-dimensional model by means of vertex index; sequentially splicing the vertex data sets of the at least two three-dimensional models to obtain combined vertex data, and sequentially splicing the index data sets of the at least two three-dimensional models to obtain combined index data; and rendering the at least two three-dimensional models based on the combined vertex data and the combined index data. The application only needs one pair of vertex buffer and index buffer, so as to realize the storage of the combined vertex data and the combined index data without multiple pairs of buffers, thereby being conducive to reducing the demand for buffers.

The present application belongs to the field of augmented reality, computer vision, computer graphics, and relates to a kind of garment three-dimensional reconstruction method based on geometric prior and generated image auxiliary, comprising: obtaining image, inputting image into trained garment three-dimensional reconstruction model, and obtaining detailed three-dimensional garment grid;Garment three-dimensional reconstruction model includes: multi-modal prior information extraction module, garment generation network and geometry enhancement module;The present application extracts prior information that can reflect geometric structure from synthetic image, i.e.semantic segmentation map and surface normal map, which is jointly trained with real data set, and combined with real data set to construct garment statistical model, and according to garment statistical model, principal component coefficient is restored to garment grid, to make up for the problem of insufficient three-dimensional supervision signal, without relying on additional three-dimensional scanning grid data, improve the representation ability of model to complex garment shape, thereby improve the precision and generalization performance of three-dimensional garment reconstruction.

A rendering method, apparatus, device, and storage medium for a 3D model are disclosed, relating to the field of computer graphics technology. The method includes: acquiring vertex position data of a 3D model, wherein the vertex position data indicates a first position of at least one vertex of the 3D model in 3D space; projecting at least one vertex from 3D space to screen space according to camera parameters of a virtual camera in 3D space, obtaining projection point position data, wherein the projection point position data indicates a second position of the corresponding projection point of at least one vertex in screen space; predicting projection point color data corresponding to a preset lighting effect of the 3D model in 3D space using a light gradient model based on the projection point position data and camera parameters; and rendering the 3D model using the projection point position data and projection point color data to obtain a rendered image of the model. This application enables automatic rendering of lighting effects of 3D models, improving the rendering efficiency of lighting effects.

The application discloses a kind of reconfigurable intelligent surface auxiliary wireless environment modeling method based on three-dimensional Gaussian splash technology, belong to wireless communication field, this method will three-dimensional Gaussian splash technology from computer graphics field innovatively migrate to RIS auxiliary wireless communication system modeling field, the explicit parameterization thought of 3D-GS is applied to radio frequency electromagnetic field modeling, break through the limitation of traditional deep learning "black box" modeling;Adopt two-stage joint modeling framework: for the characteristics of RIS system, "TX→RIS" and "RIS→RX" cascade modeling strategy is designed, can accurately capture the electromagnetic regulation effect of RIS;With explicit physical parameterization: replace large-scale neural network weight with Gaussian parameter with clear physical meaning, realize light weight;In addition, by constructing complete differentiable rendering process, support efficient gradient descent optimization, ensure training efficiency and convergence.

This invention discloses a method, system, and storage device for generating high-fidelity invoice data based on browser kernel dynamic rendering and dual-pipeline physical simulation, belonging to the field of artificial intelligence and big data processing technology. It includes: constructing a metadata generation engine to generate an invoice text data stream; constructing an HTML invoice template, injecting the invoice text data stream into the template, and dynamically rendering to generate a high-resolution invoice bitmap; obtaining the original coordinate set of the rendering layer; correcting the original coordinate set using a compact bounding box to obtain pixel-level precision labeled coordinate data; enhancing the invoice bitmap and the corrected labeled coordinate data to generate a physically simulated invoice image; and serializing and outputting the invoice image and a heterogeneous labeled file containing the corrected labeled coordinate data. This invention utilizes a browser rendering engine to generate structured documents and simulates real physical environment interference through computer graphics algorithms, thereby generating data for training an intelligent document processing model.

This application relates to the field of computer graphics technology, and in particular to a marine visualization method and system for simulating ship motion. The method includes: generating an ocean height field based on a selected wave spectrum; acquiring viewpoint height and topographic information, and generating an ocean mesh model based on the viewpoint height, the topographic information, and the ocean height field; calculating ocean surface reflected light, ocean surface scattered light, and foam based on the ocean mesh model to obtain the ocean visualization result. This application can simulate ocean height fields and lighting effects under different sea conditions, and users can quickly adjust the simulation environment according to their needs. Visualizing marine elements can intuitively reflect changes in the marine environment, which is helpful for environmental monitoring and management. For example, visualization of data such as temperature and ocean currents can assist in scientific research and decision-making.

The application provides a progressive text-guided three-dimensional model generation method and system for complex semantic hints, and belongs to the technical field of computer graphics and artificial intelligence generated content cross technology. A 3D semantic component positioning module based on zero-shot learning and a geometric perception double-path optimizer are used. A positioning strategy based on zero-shot learning is used in combination with a visual large model to automatically identify and position the to-be-edited area in the three-dimensional model. Then, the geometric perception double-path optimizer is used to drive the positioning area to evolve towards the target semantics while constraining the non-editing area to remain unchanged. Finally, a high-fidelity three-dimensional model is output. The application solves the technical problems that text-based three-dimensional technology is prone to semantic ambiguity when processing complex logical hints, and that catastrophic forgetting occurs in non-associated areas when editing locally.

The present application relates to a kind of three-dimensional reconstruction method and system of three-dimensional Gaussian splashing indoor scene based on plane prior guidance, belong to three-dimensional reconstruction and computer graphics technology field.The method aims to solve the problem of inaccurate geometry reconstruction and easy to produce artifact in weak texture area in indoor scene reconstruction, especially in weak texture area.The method aims to solve the problem of inaccurate geometry reconstruction and easy to produce artifact in weak texture area in indoor scene reconstruction, especially in weak texture area.First, obtain multi-view image and its camera parameter, predict depth and normal prior, and extract plane area by multi-granularity segmentation and geometric consistency test.Density point cloud is generated by depth prior back projection, and three-dimensional Gaussian splashing model is initialized based on down-sampling point cloud.Finally, under the framework of differentiable rendering, the model is optimized by combining plane area geometric constraint, non-plane area geometric constraint and global geometric constraint, and the reconstruction is completed.The present application effectively improves the reconstruction accuracy of weak texture plane area, enhances the detail recovery ability of complex structure area, and realizes the reconstruction result with visual high fidelity and geometric accuracy.