97 results about "Texture rendering" patented technology

An apparatus for interactive model generation using multi-images includes an image capturing means for capturing an arbitrary object as a 2D image using a camera, a modeler graphic user interface means for providing a 3D primitive model granting interactive relation of data between 2D and 3D, a 3D model generation means for, matching a predetermined 3D primitive model and the 2D image obtained from the image capturing means, a texture rendering means for correcting errors generated in capturing the image and an interactive animation means for adding and editing animations of various types at the 3D model for the 2D images.

The present invention provides a real-time three-dimensional scene reconstruction method for a UAV (unmanned aerial vehicle) based on the EG-SLAM. The method is characterized in that: visual information is acquired by using an unmanned aerial camera to reconstruct a large-scale three-dimensional scene with texture details. Compared with multiple existing methods, by using the method provided by the present invention, images are collected to directly run on the CPU, and positioning and reconstructing a three-dimensional map can be quickly implemented in real time; rather than using the conventional PNP method to solve the pose of the UAV, the EG-SLAM method of the present invention is used to solve the pose of the UAV, namely, the feature point matching relationship between two frames is used to directly solve the pose, so that the requirement for the repetition rate of the collected images is reduced; and in addition, the large amount of obtained environmental information can make theUAV to have a more sophisticated and meticulous perception of the environment structure, texture rendering is performed on the large-scale three-dimensional point cloud map generated in real time, reconstruction of a large-scale three-dimensional map is realized, and a more intuitive and realistic three-dimensional scene is obtained.

A method for preparing a multi-channel 3D nano texture mold comprises the steps of: coating photoresist on a PET photoetching material, and then entering a stainless steel dust-free furnace for dryingfor standby; arranging a mask pattern plate on the raw rubber surface of the PET photoetching material, vacuuming for photoetching, taking out the mask pattern plate after the photoetching is completed, putting the prepared developer into a cleaning box, putting the photoetching-finished PET photoetching material into the cleaning box for cleaning, displaying the pattern on the PET photoetching material, dehydrating and spinning to obtain a first texture layer; then, performing second texture layer photoetching process which is similar to the first layer, realizing second texture processing superposition to obtain the multi-channel 3D nano-texture mold. The method has the advantages of simple manufacturing process, low cost, reusability, multi-texture superposition, better texture rendering effect and improved working efficiency.

The 3D window system utilizes hardware accelerated window system rendering to eliminate the pixel copy step of 3D window system output redirection. The 3D window system includes a window server that directs the window system device driver graphics routines to render into the texture memory of a graphics device.

The invention discloses a game rendering method and device. The game rendering method comprises the steps of recording a loading path of a texture used in a current game scene when game resources are loaded; obtaining a grid to be rendered in the current game scene; detecting whether a texture used by the grid to be rendered is loaded into a memory or not; when the texture is not loaded, conducting asynchronous loading on the texture through a background thread according to the loading path of the texture, so that the texture is loaded into the memory, and skipping the rendering of the texture for a current rendering batch; when the texture is loaded ready, submitting the texture to a rendering engine for conducting the rendering. According to the game rendering method and device, the texture rendering process is controlled, so that memory space occupied by the texture in the game operation process is greatly reduced.

The invention discloses a texture rendering method and system for real-time three-dimensional human body reconstruction, a chip, equipment and a medium. The method comprises the steps of obtaining a current human body model and a depth image of a shooting object; selecting a current human body model as a standard model, reprojecting the vertex of the standard model to the depth image, extracting color information and image coordinates corresponding to the vertex, wherien the color information is a color initial value, and the image coordinates are converted into texture coordinates; calculating a weighted sum of the subsequent color information of the vertex of the human body model and the color initial value to serve as a new color of the vertex of the standard model; calculating sub-texture maps and sub-masks of the current human body model, and combining the sub-texture maps and the sub-masks into a complete texture map and mask; and performing rendering according to the texture mapand the texture coordinates. According to the method, generation and optimization of required textures can be rapidly completed based on the GPU, a high-quality texture atlas is obtained, and color cracks caused by illumination changes are eliminated. A human body model generated in a multi-camera system can be rendered, and a good visual reality sense is achieved.

A “mesostructure renderer” uses pre-computed multi-dimensional “generalized displacement maps” (GDM) to provide real-time rendering of general non-height-field mesostructures on both open and closed surfaces of arbitrary geometry. In general, the GDM represents the distance to solid mesostructure along any ray cast from any point within a volumetric sample. Given the pre-computed GDM, the mesostructure renderer then computes mesostructure visibility jointly in object space and texture space, thereby enabling both control of texture distortion and efficient computation of texture coordinates and shadowing. Further, in one embodiment, the mesostructure renderer uses the GDM to render mesostructures with either local or global illumination as a per-pixel process using conventional computer graphics hardware to accelerate the real-time rendering of the mesostructures. Further acceleration of mesostructure rendering is achieved in another embodiment by automatically reducing the number of triangles in the rendering pipeline according to a user-specified threshold for acceptable texture distortion.

The invention provides a geographic information system (GIS) information ultrahigh resolution displaying method. The method is a splicing displaying method which includes acquiring GIS map information through cluster map sub blocks and WMS service in parallel on the basis of the computer cluster parallel processing, utilizing map projection transformation distribution to process data and conducting parallel texture rendering displaying through a graphic processing unit (GPU). A computer cluster is utilized to acquire, process and display map information, and the massive GIS map processing and displaying problem can be effectively solved. According to a cluster map sub block technology, sub block processing is conducted on a high resolution map according to cluster node machines, the resolution of the displayed map can be expanded by increasing the number of the node machines and is not limited by the resolution of a display screen, and ultrahigh resolution GIS information displaying can be achieved.

The invention provides a face texture image acquisition method and device, equipment and a storage medium. The method comprises the steps that point cloud of a three-dimensional face model of a targetobject and face images of n head postures of the target object are acquired; index information of three-dimensional data points in the point cloud is calculated through cylindrical expansion; obtaining a mapping relationship between three-dimensional data points in the point cloud and pixel points on the face image; image areas corresponding to the head postures are obtained from the n face images respectively, and n effective areas are obtained; generating region texture images corresponding to the n effective regions according to the index information and the mapping relationship; and performing image fusion on the n region texture images to generate a face texture image of the target object. According to the method, the corresponding face texture image can be generated for the three-dimensional face model obtained through arbitrary reconstruction, so that the texture rendering effect of the three-dimensional face model can be improved, and the authenticity of the finally generatedface texture image can be improved.

Defects are removed from a tessellated polygonal mesh provided for the rendering of polygon corresponding image parcels through a process that first determines, for a predetermined segment of a first edge of a first polygon within the polygonal mesh, a difference in tessellation level between the first polygon and a second polygon disposed adjacent the predetermined edge of the first polygon, subject to the occurrence of a defect in the polygonal mesh between the first and second polygons. A terminus of the predetermined segment is then computed based on the difference in the tessellation levels and a new vertex, corresponding to the terminus, is added to a first set of vertices that define the first polygon. An image parcel can then be rendered based on the set of vertices, including the added vertex, such that the first image parcel as rendered covers the defect in the polygonal mesh between the first and second polygons.

The invention discloses a haptic texture rendering method based on practical measurement, which is characterized in that after an operational handle of haptic texture display equipment collides with the surface of a virtual texture, resultant force of normal textural force, normal binding force and tangential friction is taken as contact force to be output to an operator. The normal textural force is obtained by measuring pressure which really scratches the surface of the texture, a mechanical arm which applies constant force and is provided with a pressure sensor at the bottom is used to scratch the surface of a textural material at a constant speed and collect data meanwhile, and after error item correction, smoothness, voltage value conversion, mechanical arm constant force value subtraction of the data, the data are converted into the normal textural force; the modeling of the normal binding force adopts a spring damping model; and the modeling of the tangential friction synthesizes a static friction stage and a sliding friction stage, the modeling at the static friction stage adopts the product of maximal static friction and a sine function, a coefficient of kinetic friction at the sliding friction stage is obtained by calculating the normal textural force reflecting the concave-convex degree of the texture, and the naturalness of the texture rendering is improved.

The invention discloses an SGOG tile-based large region true three-dimensional geographic scene adaptive construction method. The method comprises the steps of processing DEM source data by utilizing an IDL, taking OSG as a graphic engine, taking VS2010 as a platform, and taking standard C++ as a development language, so that an experimental system is constructed; and performing DEM elevation calculation and matching by calculating and storing SGOG tile grid point coordinates, drawing tiles based on grid point elevation by the obtained SGOG grid point coordinates to construct a true three-dimensional terrain framework, performing modeling on the framework, and performing layered color setting and texture rendering. According to the method, large region crust true three-dimensional visualization modeling in view of earth curvature is realized; the defects of projection space model-based deformation, cracks and the like are overcome; integrated seamless organization and modeling of earth surface big data are realized; and natural manifold properties of a geographic space are recovered.

The invention provides a method and a device for displaying a three-dimensional GIS (geographic information system) model. The method comprises the following steps of obtaining vector data for generating the model, and according to geometric primitive data correlated with the vector data, generating the corresponding to-be-displayed model, or according to the height data correlated with the vector data, generating the corresponding to-be-displayed model; according to the current vision point height and vision field range, judging if the to-be-displayed model of the corresponding display area needs to be displayed and the to-be-displayed model needs to be subjected to texture rendering or not; if so, finding the corresponding texture from a pre-generated texture base, performing the texture rendering on the to-be-displayed model according to the finding results, and displaying the to-be-displayed model subjected to the texture rendering. The method and the device for displaying the three-dimensional GIS model can be used for improving the efficiency of refining display of massive three-dimensional GIS models.

The embodiment of the invention discloses a video processing method, which is applied to a video processing system, and the video processing system comprises an on-screen module and an off-screen module. The on-screen module can obtain special effect parameters determined according to a to-be-processed video, wherein the special effect parameters comprise template information used for identifyingspecial effect types and text information used for identifying special effect contents. The on-screen module stores the input texture corresponding to the to-be-processed video and sends the special effect parameter to the off-screen module, and the off-screen module completes texture rendering of the input texture in the background according to the special effect parameter to obtain an output texture, thereby completing texture rendering of the input texture based on the special effect parameter. Wherein the output texture can be obtained by the upper screen module so as to be drawn on a display interface to enable a user to see a video with a character special effect. Video special effect processing is completed by the video processing system, a user does not need to have video processing skills, and user video communication experience is improved. The embodiment of the invention further discloses a video processing system.

The invention discloses a graph drawing method and an electronic device. The method comprises: when the electronic device displays a first graph, detecting a user input event; generating a graph drawing instruction based on the input event, wherein the graph drawing instruction comprises drawing elements of a target graph; based on the drawing elements of the target graph, when the target graph isdrawn, re-rendering a first region needing to be re-rendered in the first graph; synthesizing the first region and the second region after the re-texture rendering to obtain a target graph; wherein the second region is a region which does not need to be rendered again on the first graph; displaying target graphics. According to the graph drawing method, the electronic device only needs to renderthe first area needing to be rendered again on the first graph, and does not need to render the second area (the area not needing to be rendered again) again, so that the power consumption is reduced,and the efficiency is improved.

The invention provides a 4D holographic video capturing method. Image information of a scene and an object are captured through a multi-camera image sequence synchronous acquisition system. Through using an image processing method and a computer vision processing method, an accurate 3D object model which corresponds with each frame of a photographed object is established according to each frame ofimage data and a camera parameter. Rendering reconstruction is performed on the texture of the photographed object through texture rendering, thereby obtaining a vivid reproduced three-dimensional photographing object and a photographed object three-dimensional model of which each frame can be viewed in different angles. A 4D holographic video is obtained through continuously playing the frames,thereby reproducing a three-dimensional static or dynamic object in a high vivid manner.

The invention discloses an image processing method. The method comprises the following steps: grayscale processing is carried out on an original image to obtain a grayscale image; Performing image edge detection and preset calculation on the gray-scale image to obtain a sketch stroke structure image; Matching the gray-scale image and the real sketch image with a histogram, and performing texture rendering to obtain a texture rendering image; The sketch stroke structure image and the texture rendering image are fused to obtain a sketch result image. In addition, the invention also discloses a mobile terminal and a computer-readable storage medium. Thus, the sketch effect image edge contour generated by the image processing method provided by the invention is continuous, has a line feeling,and is closer to the real sketch image.

The present invention relates to an apparatus and method for generating a texture of a 3D reconstructed object depending on a resolution level of a 2D image. The apparatus includes a 3D object reconstruction unit for extracting, from images captured from at least two areas located at different distances, information about a 3D object and information about cameras, and then reconstructing the 3D object. A resolution calculation unit measures size of a space area, covered by one pixel of each of the images in a photorealistic image of the 3D object, and then calculates resolutions of the images. A texture generation unit generates textures for respective levels corresponding to classified images by using the images classified according to resolution level. A rendering unit selects a texture for a relevant level depending on a size of the 3D object on a screen, and then renders the selected texture.