46 results about "Ambient occlusion" patented technology

The invention relates to a method and a system for drawing ambient occlusion images based on GPU (graphic processing unit) acceleration. The method comprises the following steps: 1) building a hemispherical camera system consisting of uniformly-distributed cameras in a CPU (central processing unit) processor; 2) selecting a camera to shoot scenes within a certain range around an object to be rendered so as to obtain a scene depth map (with scene depth values) for the scenes within a certain range around the object to be rendered; 3) receiving the vertex data (include a vertex coordinate) of the object to be rendered, and carrying out calculation according to the vertex coordinate so as to obtain the rendering depth value of a pixel; 4) according to the scene depth value and rendering depth value of the pixel, calculating the AO (ambient occlusion) information of the pixel; 5) storing the AO information of the pixel into an AO map according to a pre-generated AO map; and 6) rendering the online scene of the AO map into displayable ambient light, then outputting the displayable ambient light. In the method, because the AO information calculation process is completed in the GPU processor, and the GPU processor has a strong parallel processing capacity, the calculation efficiency is greatly increased.

A system and method for displaying a unified representation of performance related data for a building are disclosed. The system includes a sensor network for collecting data in the building and a computing device for generating and displaying a unified representation of performance related data on a display. The performance related data may include the raw data collected by the sensor network or data generated by simulation programs based on the raw data collected by the sensor network. The computing device displays the performance related data in the context of a graphical representation of a three-dimensional model of the building as defined in a building information model (BIM). The computing device generates the graphical representation using an ambient occlusion rendering technique and then incorporates the performance related data either using a direct rendering technique or a transient geometry technique.

A method to detect a structure of interest includes shading a target from ambient light. A first plurality of images is acquired from the target. Background in the first plurality of images is reduced to minimize or eliminate brightness variation in the images and to generate a first plurality background-reduced images. A second plurality of images is acquired from the target. Background in the second plurality of images is reduced to generate a second plurality of background-reduced images. Noise in the second plurality of background-reduced images is reduced to generate a noise-reduced image, which is then multiplied to generate an amplified image. A structure of interest is detected in the amplified image. An imaging device that can be used to carry out the method is also included and includes an illuminator that shades the target from ambient light and scatters light.

The invention provides an ambient light occlusion method for a microstructural surface object of screen space. The method comprises the following two steps: drawing a scene under a view point, drawing depth information of a scene vertex under visual space in a piece of floating texture; and drawing a full-screen quadrangle, quickly calculating a value of the ambient light occlusion in image space by using an occlusion angle of an object according to the obtained depth texture, and outputting the value of the ambient occlusion onto a screen. The method can quickly calculate the ambient light occlusion for the microstructural surface object, and has the advantages of high efficiency and verisimilitude.

The method includes receiving a plurality of graphics primitives for rendering at a GPU of a computer system and rendering graphics primitives into pixel parameters of the pixels of a display, wherein the parameters include pixel depth values and pixel normal values. For each pixel of the display, an ambient occlusion process is performed. The algorithm takes as input a ND-buffer containing pixel depth values and pixel normals. Based on the pixel 3-D position and the pixel normal vector, horizon heights are computed by sampling the ND-buffer and an occlusion term is computed for each pixel based on the horizon heights. Based on the pixel 3-D position, the pixel normal vector, a normal occlusion term is computed by sampling the ND-buffer above the horizon in multiple directions. An ambient occlusion illumination value is computed by combining the horizon occlusion term and the normal occlusion term.

The embodiment of the present invention discloses a three-dimensional model processing method, including: acquiring the three-dimensional model and the material of the three-dimensional model; setting the material parameters of the three-dimensional model according to the material of the three-dimensional model; and generating A shadow map of the 3D model; generating an ambient light shading effect of the 3D model according to the material parameters; baking the shadow map and the ambient light shading effect to the 3D model to generate a 3D model with light and shadow effects Model. The 3D model processing method provided by the embodiment of the present invention directly generates the shadow map and ambient light occlusion effect of the 3D model according to the material of the 3D model specified by the producer, which saves the time for making the model and reduces the time for the producer to learn modeling. time and cost.

The invention discloses an AO (ambient occlusion) method based on screen space. The AO method includes obtaining gray values of pixels according to positions and normals of the pixels in a scene drawn; subjecting the gray values of the pixels and scene color to multiplication to obtain a final light and shade effect. During physical operation after image rasterization, color information around the pixels are sampled, simple depth value comparison is performed to calculate a range, which ambient lighting cannot reach, of an object, and accordingly, outline shadow of the object surface which is under the ambient lighting is proximately represented, with calculation high in speed and high in efficiency.

The invention discloses a processing method and device of ambient occlusion (AO). The method includes: respectively selecting a corresponding reference vertex for each vertex on a target mesh object in a vertex set of a source mesh object; acquiring values of three-dimensional spatial distances between the reference vertices and the corresponding vertices on the target mesh object, and normalizingthe values of three-dimensional spatial distances to obtain vertex occlusion values; and storing the vertex occlusion values into data channels of the corresponding vertices on the target mesh object. The method solves technical problems that self-shadowing effects obtained by ambient occlusion calculation manners provided in the related art are poorer and require higher calculation overheads.

The invention specifically relates to an ambient light shielding method, mainly solves the problems that an existing SSAO method is insufficient in sense of depth at corners and wrinkles and not obvious in contrast ratio, and meanwhile applicable to complex and completely dynamic scenes, for achieving stabilization and greatly improving rendering performance. The method comprises the steps of firstly subsequent calculated amounts via downsampling; then introducing a discrete horizontal structure, and computing an outline level and an outline value through sampling depth textures; then reducingthe distance between a current texture pixel and a sub-pixel through using linear or Gaussian attenuation according to the distance, and at last reducing noise influence via smooth filtering. The method is applicable to the fields of video games, animation production and live-action simulation, can relatively realistically simulate a rendering effect of overall illumination under the condition ofreal-time running, and improves aiming at the defects in three aspects: sampling point selection, texture sampling and smooth filtering, and thus via improving the performance and the rendering effect, the method is more applicable to rendering the real-time game scene in the three-dimensional game.

The invention provides a management method of voxel landform. The management method comprises the following steps that (1) landform is selected and built, the environment lighttight shield informationof the landform is calculated and stored into 3D texture, and environment lighttight shield is processed; (2) collision mesh is processed by using a cubic surface extraction algorithm and a GreedyMeshing algorithm, and (3) static mesh are instantiated by using binary tree. The management method of voxel landform ensures the execution efficiency of calculating the environment lighttight shield byusing the simplified environment lighttight shield algorithm, guarantees the high efficiency of mesh extraction by using the simple cubic surface extraction algorithm, manages the instantiated staticmesh by using the binary tree, and improves the view-frustum culling efficiency.

A method, apparatus and computer program product are provided for non-occluding overlay of user interface or information elements on a contextual map. A method is provided including receiving a two dimensional image associated with a geographic area or object, receiving geometry model associated with the associated with the geographic area, generating an embossing map based on ambient occlusions associated with the geometry model, and generating a composite image based on the two dimensional image and the embossing map.

The embodiment of the invention provides a dynamic map adjustment method and device. The method comprises the steps of acquiring normal information of a model of an object in a game, wherein the normal information comprises a normal direction corresponding to each pixel point in the model; obtaining included angle information according to a line-of-sight direction and the normal information, wherein the included angle information comprises an included angle between the line-of-sight direction and each normal; conducting processing according to an ambient occlusion map and the included angle information to obtain a rendered object. According to the embodiment, real-time calculation is carried out according to the line-of-sight direction and the normal information, and therefore the sense ofreality of the game is improved.

The invention discloses a method for extracting the pore structure of a whole soil aggregate in a CT digital image, and belongs to the technical field of soil structure exploration, and the method comprises the following steps: (1) obtaining the CT digital image of the soil aggregate, and carrying out the preprocessing of the image; (2) performing parameter optimization according to the two characteristics of the image size and the connectivity, and extracting the pore part of the soil aggregate by using an ambient light shielding calculation method. When the soil aggregate image is subjectedto ambient light shielding calculation through the ambient light shielding calculation method, optimizing key parameters of the calculation module, so that the calculation time is shortened, and the calculation efficiency is improved. The image processing efficiency can be greatly improved, the operation time is shortened, and therefore rapid extraction of pores of the whole aggregate is achieved.

The embodiment of the invention relates to the technical field of rendering of three-dimensional games, in particular to a rendering method and a rendering device. By adopting the rendering method, anenvironment light shielding weighted value of a vegetation model can be calculated when a game client is offline, and a real-time illuminating intensity value can be calculated when the game client is online, so that the follow-up rendering calculation and model rendering by the game client can be realized based on the environment light shielding weighted value and the environment light shieldingweighted value. Therefore, the calculating pressure of the game client is alleviated, the calculating efficiency is improved, and the rendering effect of the game client is guaranteed.

The invention discloses an ambient light shielding processing method, device and equipment, relates to the technical field of game light and shadow processing, and can solve the technical problems that the calculation pressure of a server is increased and the game experience of a user is easily influenced when ambient light shielding processing is carried out at present. Comprising the steps that a target model unit of a target virtual object is acquired, the target model unit is a model unit to be subjected to ambient light shielding processing, and the target model unit is provided with a minimum bounding box; a target three-dimensional texture corresponding to the target model unit is obtained, the target three-dimensional texture is a pre-baked three-dimensional texture of the target model unit, and the size of the target three-dimensional texture is related to the size of a minimum bounding box of the target model unit; a target cube model of the target model unit is obtained, the target cube model is used for rendering the target three-dimensional texture, and the size of the target cube model is the same as that of the target three-dimensional texture; and rendering the ambient light shielding effect of the target model unit according to the target cube model and the target three-dimensional texture.

A user may create a customized virtual game character and the customized virtual game character may be physically substantiated. In some embodiments the virtual game character is physically substantiated by making a toy in the form of the virtual game character, which in some embodiments has computer readable information regarding the virtual game character. In some embodiments the toy is made by way of 3-D printing. In various embodiments portions of the toy which may be considered too thin for 3-D printing are expanded. In some embodiments internal ambient occlusion information is used in determining if a portion is too thin.