17 results about "Ambient occlusion" patented technology

This invention discloses a collaborative cloud rendering system, including a lighting and shadow rendering module. The module's direct lighting rendering unit performs rendering through direct lighting calculations, the shadow rendering unit performs rendering through shadow calculations, the ambient occlusion rendering unit performs rendering through ambient occlusion calculations, and the indirect lighting rendering unit performs rendering through indirect lighting calculations. The indirect lighting rendering unit runs on a cloud backend device. A hybrid rendering unit performs rendering through hybrid calculations and runs on a web frontend device. Depending on the performance of the web frontend device, each unit runs on either the web frontend device or the cloud backend device. Therefore, this invention proposes four key real-time lighting and shadow rendering algorithms for collaborative real-time dynamic lighting and shadow rendering in Web3D cloud rendering, optimized through analysis of various data such as algorithm frame rate, the operating efficiency of the device running the algorithm, and the lighting and shadow rendering results.

The present application relates to the technical field of image rendering, and discloses an inner hatching drawing method and device, electronic equipment and a storage medium, which are used for improving the inner hatching mapping drawing efficiency of a PBR model and improving the integrity of mapping hatching. The method comprises the following steps: obtaining a physical rendering PBR map of a target model, wherein the PBR map comprises a normal map, an ambient light shading map and a diffuse reflection map; generating an inner hatching according to the normal map and the ambient light shading map to obtain an inner hatching map of the target model; and superimposing the inner hatching map and the diffuse reflection map to obtain an inner hatching image of the target model.

Embodiments of the present disclosure relate to dark count rate mitigation on avalanche photodiode based ambient light sensors. An example apparatus, a computer-implemented method, and an electronic device including an ambient light sensor configured to mitigate effects of a dark count rate associated with an avalanche photodiode are provided. The example apparatus includes an exposed avalanche photodiode array, a dark avalanche photodiode array, and a controller. The exposed avalanche photodiode array is positioned to receive ambient light from an external environment. The dark avalanche photodiode array is shielded by ambient light. The controller is configured to receive an exposure illuminometer corresponding to ambient light received at the exposed avalanche photodiode array. The controller is further configured to receive a dark illuminometer number corresponding to a dark count at the dark avalanche photodiode array. The controller determines an ambient light value based on a difference between the exposure illuminometer number and the darkness illuminometer number.

The application discloses a kind of low face number 3D modeling method of high-precision realistic to object, belong to three-dimensional modeling technical field.The application is first to the three-dimensional model obtained by three-dimensional scanning is reduced face, to overcome the defects that the face number of model obtained by 3D scanning mode is more, will be replaced into temporary three-dimensional model based on first three-dimensional model, and utilize color feature based on photo obtains and carries out texture baking, overcome the defects that model obtained by 3D scanning mode does not have the color (texture) map of original object or color is not clear, color difference is larger, etc., normal map and ambient light shading map are generated based on second three-dimensional model before reducing face, guarantee the high definition of realistic 3D model obtained, the application combines 3D scanning modeling mode and photo modeling mode, can realize the 1:1 reduction of object, make model can faithfully reflect the concave-convex, luster, roughness etc. Characteristics of original object, while reducing the face number of model, improve the realistic effect of model obtained by modeling.

The invention discloses a vegetation instance rendering method and device, a storage medium, equipment and a program product. The method comprises the steps of obtaining a base model; generating a plurality of vegetation instances on the base model; for each vegetation vertex of the vegetation instance, determining a simulated ambient light shielding value of each vegetation vertex based on relative height information of the vegetation vertex relative to the surface of the substrate model; according to the vegetation instance rendering method for rendering the vegetation instance based on the simulated ambient light shielding value, the vegetation instance is generated on the base model, and the simulated ambient light shielding value is determined by using the relative height information of the vegetation vertex relative to the surface of the base model for rendering. According to the method, the problems of vegetation gap shadow detail missing, visual presentation planarization and obvious floating paste phenomenon caused by dependence on a general ambient light shielding algorithm in related technologies are solved, the complex light and shadow effect between microscopic vegetation clusters can be accurately simulated with low calculation cost, and the stereoscopic impression and visual trueness of vegetation rendering are remarkably improved.

The embodiment of the invention discloses a rendering method and device, electronic equipment and a program product, and the method comprises the steps: obtaining a vertex angle value of a vertex of a to-be-rendered three-dimensional building, the vertex angle value being equal to interior angle values of two side surfaces of the vertex formed by the three-dimensional building, and the two side surfaces having an intersection line; when the three-dimensional building is rendered, whether the vertex angle value of the vertex is larger than 180 degrees or not is judged, and if the vertex angle value of the vertex is larger than 180 degrees, the brightness of the pixels of the two side faces forming the vertex is controlled to be gradually increased from small to large according to the sequence that the distances between the pixels and the intersecting line are from near to far, so that the intersecting shadow area of the two side faces is rendered. According to the technical scheme, the ambient light shielding effect of the three-dimensional building can be realized by performing simple rendering calculation in real time, the universality of the scheme is improved, and the applicable equipment and the applicable scene are wider.

The invention, which relates to the technical field of virtual reality and computer graphics, discloses a dynamic reloading interaction system for a meta-universe virtual reality image, comprising the following steps: receiving virtual reality image data in a meta-universe environment, and outputting a space interaction tensor; generating a clothing 3D grid space through a thin plate spline interpolation algorithm, and performing illumination baking on the clothing 3D grid space to generate a static environment light shielding map; and mapping the clothing 3D grid space to a mathematical complex plane, generating a fractal basic texture through iterative solution based on a plurality of seed points, a plurality of parameters and a physical interaction increment item, and synthesizing the fractal basic texture and a static environment light shielding map to obtain the intelligent fabric finally presented on the surface of the virtual reality image. According to the system, the dynamic intelligent fabric with the biological interaction characteristic is realized under low computing power, and the technical problems that virtual clothes are difficult to fit, have no interaction and are inflexible in texture are solved.

The invention belongs to the technical field of display panel quality detection, and particularly relates to a display screen abnormal point detection method based on image processing, which comprises the following steps: capturing a self-luminous physical channel image of a display screen in real time through a polarization filtering array, and meanwhile, generating a virtual channel image by adopting a pre-trained ambient light shielding GAN network; pixel-level differential operation is carried out on the two-channel image to eliminate ambient light noise, and an illumination invariance correction image is output; the corrected image is input into a pyramid feature distillation network PFD to extract cross-scale defect features, the pyramid feature distillation network PFD comprises a three-level feature processing flow path, the angle of a light-transmitting axis is dynamically calibrated through a polarization filtering array to capture intrinsic radiation of a screen, a virtual channel is generated in combination with ambient light shielding, pixel-level difference and morphological filtering are executed, and the cross-scale defect features are obtained. The environment light noise suppression rate and the dark spot detection rate are improved, and the problems of the micro-defect omission rate and the high-reflection-area false alarm rate caused by illumination fluctuation of a production line in a traditional gray threshold value method are solved.

The present application discloses a method and device for evaluating the ambient light shielding rate of a curtain, which comprises obtaining a first stereoscopic angle interval and a second stereoscopic angle interval of a light source irradiating the curtain; splitting the first stereoscopic angle interval and the second stereoscopic angle interval respectively to obtain a plurality of first stereoscopic angles and a plurality of second stereoscopic angles; determining a plurality of first ambient light shielding rates and a plurality of second ambient light shielding rates based on the plurality of first stereoscopic angles and the plurality of second stereoscopic angles; and evaluating the ambient light shielding rate of the curtain based on the plurality of first ambient light shielding rates and the plurality of second ambient light shielding rates to obtain an evaluation result. By obtaining the ambient light shielding rates corresponding to a plurality of directions, each ambient light shielding rate in each direction is obtained based on a plurality of stereoscopic angles, and different formulas are used to calculate the ambient light shielding rates in different directions, the calculated ambient light shielding rates are made more accurate, thereby improving the accuracy of the evaluation of the ambient light shielding rate of the curtain.

The application discloses a dynamic dressing interaction system for a metaverse virtual reality image, and relates to the technical field of virtual reality and computer graphics, comprising receiving virtual reality image data in a metaverse environment and outputting a spatial interaction tensor; generating a clothing 3D grid space through a thin plate spline interpolation algorithm, and performing light baking on the clothing 3D grid space to generate a static ambient light shadow map; mapping the clothing 3D grid space to a mathematical complex plane, generating a fractal base texture based on a complex seed point, a complex parameter and a physical interaction incremental term through iterative calculation, and synthesizing the fractal base texture and the static ambient light shadow map to obtain an intelligent fabric finally presented on the surface of the virtual reality image. The system realizes dynamic intelligent fabric with biological interaction characteristics under low computing power, and solves the technical pain points of virtual clothing fitting difficulty, no interaction and texture rigidity.

This application relates to the field of computer technology and discloses a rendering method, apparatus, device, medium, and product for a semi-transparent model. The method includes: acquiring a base model to be rendered and a semi-transparent material; determining the ambient occlusion value of each vertex in the base model based on a directed distance field; determining a first blend color of the vertex by weighting the base color of the material and the refraction color of the gaps based on the ambient occlusion value of the vertex; determining a second blend color of the vertex by weighting the first blend color and the edge light transmission color based on the curvature of the vertex; and rendering the base model based on the semi-transparent material and the second blend colors of each vertex to generate a semi-transparent model corresponding to the base model. This application can improve the rendering effect at the gap position, enhance the edge transmission of the model, and effectively avoid problems such as black gaps and distorted edge light transmission.

The invention provides an image rendering method and device, equipment and a chip, and the method comprises the steps: obtaining a to-be-rendered target image in response to a user operation, and carrying out the fusion of the depth information and normal information of the target image, and obtaining the fusion information; performing feature extraction on the fusion information to obtain ambient light shielding information of the target image; according to the ambient light shielding information, correcting the illumination information of the target image to obtain corrected illumination information; and performing illumination rendering on the target image according to the corrected illumination information. Therefore, the ambient light shielding information of the target image is determined by using the depth information and the normal information of the target image at the terminal, and is applied to the illumination information of the target image, so that the rendering image quality can be improved and the rendering power consumption can be reduced while the real-time performance is ensured.

One or more embodiments of the invention provide a method and device for improving the visual effect of an open thread, and the method comprises the steps: obtaining a first texture map which is inputted by a user and is used for representing the open thread on a garment material, and an environment shielding map which comprises the shadow effect of the open thread; based on the first pixel value of each pixel in the first texture map and the second pixel value of each pixel in the environment shielding map, superposing the first pixel value and the second pixel value of each pixel corresponding to the position to obtain a third pixel value of each pixel, based on the third pixel value of each pixel, generating a second texture map for representing an open line containing the shadow effect; and outputting an open line grid picture generated based on the second texture map to the user.

The invention relates to an illumination perception video generation method and device based on renderer proxy reasoning and a storage medium. A user is supported to perform accurate and decoupling control on geometric layout, illumination conditions and camera tracks in a video generation process through a natural language instruction. A renderer agent is introduced to convert a text into a structured three-dimensional scene parameter, and a rendering engine is utilized to generate a two-dimensional scene agent comprising a diffuse reflection, gloss and roughness multi-channel layer; then, through a lightweight proxy encoder and an adapter, the physical illumination attribute is used as a strong condition signal to be injected into the video diffusion model. According to the method, the end-to-end generation from the text to the physical consistency video is realized, the generated video has accurate shadow, reflection and ambient light shielding effects while keeping realistic visual textures, the control precision and the automation degree of scene physical attributes are improved, and the method is suitable for the fields of film and television rehearsal, game asset production, virtual film production and the like.

The invention discloses a light intersection optimization method suitable for low-resolution rendering. According to the method, based on the maximum included angle constraint of a single camera, a minimum depth threshold value for preventing intersection leakage is obtained through derivation, and incoming and outgoing parameters of a ray and the boundary of a pixel block are calculated in the pixel block so as to obtain a normalized depth interval. And in combination with the depth interval and the minimum depth threshold, realizing conservative suppression of light leakage intersection under low resolution through hit judgment of three conditions. The method is easy to implement, low in calculation amount, suitable for scenes such as screen space reflection, ambient light shielding and screen space global illumination, and capable of remarkably reducing cross leakage and improving rendering stability under low resolution.

The application discloses a soft shadow image generation method, device and equipment and a readable storage medium, and belongs to the technical field of computer graphics. The method comprises the following steps: determining an ambient light shading map according to an ambient light parameter and a three-dimensional model used for representing a virtual object, wherein the ambient light shading map is used for representing the shading information of each vertex of the three-dimensional model; determining a soft shadow feature based on the ambient light shading map, wherein the soft shadow feature is used for representing the soft shadow formed by the three-dimensional model in the ambient light, and the soft shadow is a shadow with a changeable shadow parameter in an edge area; and generating a soft shadow image of the three-dimensional model based on the soft shadow feature. Since the ambient light shading map can reflect the information of the three-dimensional model and the information of the ambient light, the soft shadow image can be generated based on the ambient light shading map, and the shadow effect of the three-dimensional model is improved.

The invention provides a model generation method and apparatus, a storage medium and an electronic device. The method comprises the steps of obtaining a building model in a three-dimensional scene; determining a spatial range in the three-dimensional scene; generating a plurality of detection points in the spatial range according to a preset density; screening the plurality of detection points, and rejecting the detection points located in the building model to obtain effective detection points; performing multidirectional ray detection on each effective detection point to obtain a ray detection result; identifying a target detection point located in an ambient light shielding area based on the ray detection result; and generating a preset model at the position of the target detection point. The environment light shielding area can be automatically identified according to the distribution characteristics of the building model in the three-dimensional scene, and the model is generated at a proper position, so that an art engineer does not need to manually place each small model, the scene creation efficiency is greatly improved, meanwhile, the naturalness and reality sense of the generated model are ensured, and the user experience is improved. And the distribution characteristics of objects at corners in the natural law are met.