38 results about "Rendering (computer graphics)" patented technology

Systems and methods are provided for controlling texture sampling in connection with computer graphics in a computer system. In various embodiments, improved mechanisms for controlling texture sampling are provided that enable 3-D accelerator hardware to greatly increase the level of realism in rendering, including improved mechanisms for (1) motion blur; (2) generating anisotropic surface reflections (3) generating surface self-shadowing (4) ray-cast volumetric sampling (4) self-shadowed volumetric rendering and (5) self-shadowed volumetric ray-casting. In supplementing existing texture sampling techniques, parameters for texture sampling may be replaced and/or modified.

The invention relates to non-photorealistic rendering in computer graphics, in particular to digital simulation and synthesis with artistic style of Yunnan heavy-color painting, and belongs to the technical field of non-photorealistic graphic rendering. The digital simulation and synthesis are characterized in that: the digital simulation and synthesis comprise an establishment and management module of a Yunnan heavy-color painting basic graphic element library, a graphic element library-based Yunnan heavy-color painting traditional delineation drawing rendering module, and a Yunnan heavy-color painting traditional delineation drawing-based coloring and rendering module. The basic graphic element library is used for providing graphic elements needed by foreground traditional delineation drawings, such as hair, facial forms, trunks and the like. The Yunnan heavy-color painting traditional delineation drawing rendering module can select appropriate graphic elements from the graphic element library to combine the graphic elements by layers so as to generate the Yunnan heavy-color painting traditional delineation drawings. In order to harmoniously collocate all the graphic elements, a system provides multiple kinds of operation for the graphic elements, such as translation, selection, scaling and the like and can modify the shapes of the graphic elements at the same time. The Yunnan heavy-color painting traditional delineation drawing-based coloring and rendering module is in charge of coloring the traditional delineation drawings, and the effects of coloring can reflect texture characteristics and color characteristics in an original drawing of the heavy-color painting, and special characteristic simulation of the Yunnan heavy-color painting, such as character edge hollow sense, background fusion and the like is realized.

The invention discloses a method for generating an image with a fisheye effect by utilizing a plurality of video cameras, and relates to a digital film technology, in particular to the method for shooting a real field of view by utilizing nine video cameras to generate the image with the fisheye effect by adopting an optical principle and a computer graphics technology. The method is suitable forprojection imaging on a curved screen. The method comprises the following steps of: combining and arranging the nine video cameras, wherein one video camera is arranged in a center as a positioning reference video camera around which the other eight video cameras at different angles are uniformly distributed; and acquiring images of different visual angles by utilizing the nine video cameras in acombined way, combining the images rendered by the nine video cameras, and performing deformation processing on the combined image to obtain the image with the fisheye effect. By the method, semispherical images can be seamlessly jointed in a way of combined shooting of specific angles by adopting the plurality of video cameras, image rendering cost is low and operations are simple; and the method is suitable for projecting real image frames on the curved screen.

The invention provides a fluff effect implementation method and device and a terminal, and relates to the technical field of computer graphics images.The method comprises the steps that initial objectmodels of a to-be-simulated fluff effect are obtained and copied in response to a model copying instruction, and a preset number of initial object models are obtained; each copied initial object model extrudes corresponding preset offsets in sequence relative to the bottom-layer initial object model along the normal direction of the bottom-layer initial object model; and combining the preset number of initial object models into one model to obtain a target object model for simulating a fluff effect. According to the method, the target object model for simulating the fluff effect can be directly obtained; according to the method, fluff with a multi-layer effect can be simulated without multi-channel rendering, and the problems of high performance consumption and high limitation of a methodfor simulating the fluff effect by rendering in the prior art are solved, so that the technical effects of reducing the rendering times, reducing the performance consumption and meeting the configuration requirements are achieved.

The invention relates to the field of computer graphics, and provides a BIM rendering method and equipment based on a lightweight device, and a computer readable storage medium, so as to prevent program flash back while accelerating BIM rendering. The method comprises the following steps: analyzing the complexity, dynamic and static characteristics and/or geometrical characteristics of a buildingthree-dimensional model according to geometrical structure data of the building three-dimensional model; generating a corresponding hierarchical bounding box tree structure, a binary segmentation space tree structure or an octree structure according to an analysis result obtained by analyzing the complexity, the dynamic and static characteristics and/or the geometrical characteristics of the three-dimensional model of the building so as to record information of the three-dimensional model of the building; and based on an algorithm of a hierarchical bounding box tree structure, a binary segmentation space tree structure or an octree structure, reading information of the building three-dimensional model from a memory, and rendering an effective part of the building three-dimensional model. According to the technical scheme, when the building three-dimensional model is rendered, memory occupation can be reduced, and therefore the rendering process can be accelerated.

The invention belongs to the technical field of computer graphics. The invention relates to a three-dimensional model skin animation generation method. The method for manufacturing the computer skin animation based on the high-precision three-dimensional scanning model specifically comprises the steps that firstly, skeleton binding is completed through a digital three-dimensional model skeleton line scanned by a three-dimensional scanner and an action template library of skeletons, skin weights are calculated, model vertex coordinates are updated in real time, and the computer skin animation is completed. According to the method, the three-dimensional model scanned by the high-precision three-dimensional scanner can be processed, the weight of the vertex of the model is calculated throughan algorithm, and compared with manual processing, the workload of model processing is greatly reduced; and only storing texture coordinates, indexes and node weights of the model by utilizing a skinanimation principle, and calculating new vertex data according to the node weights in each frame rendering process. Compared with a frame data merging method and a skeletal animation method, the method has the advantages that the occupied memory space is small, non-rigid vertex deformation is achieved, and the achieved animation effect is more natural.

The present invention is directed to a method for rendering a computer graphics primitive intersected with one or more user-defined clipping planes. The method includes receiving a primitive, a clipping plane and a default scissor window; determining a second scissor window according to the spatial relationship among a first scissor window, the clipping plane and the vertices of the primitive; determining a group of pixels to be rendered by eliminating pixels not covered by an adjusted scissor window from the primitive; and determining a group of actually rendered pixels, in which the actually rendered pixels determining step includes removing the pixels meeting a clipping criterion from the group of pixels to be rendered. The present invention also includes an apparatus for performing the method.

Embodiments of the present invention are directed to rendering computer graphics using an augmented direct light model which approximates the effect of indirect light in shadows. More specifically, a shadow illuminator light source is provided for. The shadow illuminator light source is associated with an ordinary, or primary light source and is used to provide illumination in areas which are in shadows with respect to the primary light source. The shadow illuminator provides illumination only to areas which are considered to be in the shadows with respect to the light source the shadow illuminator is associated with. Thus, the shadow illuminator may be used to approximate the effects of indirect light.

A system, devices and methods to reduce the volume of data required to represent three-dimensional smooth cylindrical curves and to ray-trace these three-dimensional smooth cylindrical curves using a set of geometric primitives which have implicit curvature.

Systems, methods, and devices are disclosed for rendering computer graphics. In various embodiments, a displacement map is created for a plurality of surfaces and a tessellation process is initiated. It is determined that the tessellation density of a first set of surfaces and a second set of surfaces should be modified based on the displacement map. Based on the displacement map, a tessellation factor scale for each surface of the first set of surfaces is increased and a tessellation factor scale for each surface of the second set of surfaces is decreased, respectively.

Systems and methods for rendering computer graphics using soft-occlusion are provided. A computing system can obtain display data for a virtual element to be displayed in association with imagery depicting an environment including a physical object. The computing system can generate a set of graphics occlusion parameters associated with rendering the image data and the display data based at leastin a part on an estimated geometry of the physical object,. The set of graphics occlusion parameters can define blending of the display data for the virtual element and the imagery at a soft-occlusionregion that includes one or more locations within the estimated geometry. The computing system can render a composite image from the display data for the virtual element and the imagery based at least in part on the set of graphics occlusion parameters.

The embodiment of the invention belongs to the technical field of computer graphics, and relates to an image noise reduction method and device, computer equipment and a medium thereof.The method comprises the steps that a rendering video stream is obtained, the rendering video stream comprises multiple frames of rendering images, and each frame of rendering image comprises multiple pieces of layer information; and performing noise reduction synthesis processing on each image layer information in each frame of rendered image to obtain a pre-noise-reduced rendered image, obtaining a target rendered image, an adjacent frame of rendered image of the target rendered image and a target object existing in the target rendered image and the adjacent frame of rendered image from the pre-noise-reduced rendered image, and according to the position of the target object, obtaining the target rendered image according to the position of the target object. According to the method, the color value of the pixel point of the target object in the target rendering image is adjusted according to the color value of the pixel point of the target object in the target rendering image so as to obtain the denoised target rendering image, on one hand, reduction of denoising errors of multiple frames of rendering images in the concentrated denoising process is facilitated, on the other hand, multiplexing of inter-frame information is achieved, and the denoising quality and denoising efficiency of the rendering images are improved.

The invention provides a method and device for generating a dynamic human body free viewpoint video based on a neural network, and relates to the technical field of computer vision and computer graphics, and the method comprises the steps: reconstructing a pre-scanning model of a single human body; shooting the single human body through a plurality of RGB cameras to obtain an RGB image sequence; the pre-scanning model being deformed, so that the deformed pre-scanning model is matched with each frame of RGB image; sampling the pre-scanning model, defining a hidden code at each sampling point, and jointly optimizing the hidden codes and network parameters based on a neural network; and obtaining any rendering view angle, and generating a free viewpoint video based on the any rendering view angle. Therefore, the RGB image sequence is captured based on the plurality of RGB cameras, and the free viewpoint video with continuous and dynamic time domain is generated according to the sequence, so that a more real and dynamic rendering result is generated.

The invention discloses a space target 6D attitude estimation technology based on image segmentation Mask and neural rendering in order to solve the problems that an existing method is low in featureextraction stability and high in multi-instance high-granularity viewpoint sampling labor time cost. Image segmentation Mask is taken as stable image representation and neural network differentiable rendering is taken as an attitude true value for matching calculation, attitude representation extraction and generation are carried out by introducing new image attitude representation and computer vision instance segmentation and computer graphics differentiable rendering technologies, the feature extraction stability is improved. Micro-rendering and silhouette mask binarization operations are performed on a target three-dimensional model by using a neural rendering technology, so that the rendering precision and the matching efficiency are improved.

The invention provides a track rationality evaluation and self-generation method and system based on a given node sequence, and relates to the technical field of computer graphics real-time rendering. The method comprises the steps of 1 defining necessary parameters of an algorithm; 2 judging the legality of a node sequence according to the defined necessary parameters; and step 3 automatically generating a track based on a legal track node sequence. According to the node sequence rationality determination method based on the environmental parameter constraint, track self-generation conforming to the kinematics constraint can be carried out on the node sequence.

The invention relates to the field of computer graphics, in particular to a material rendering method and device, a storage medium and electronic equipment. The material rendering method comprises the steps of sampling a highlight value of a virtual model; configuring a material function parameter of the virtual model in a target color channel; calculating material data of the virtual model in the target color channel based on the highlight value and the material function parameter; and rendering the virtual model according to the material data. According to the material rendering method provided by the invention, the controllability of laser material rendering can be enhanced, and meanwhile, the precision of the rendering effect is improved.