8 results about "Ambient occlusion" patented technology

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 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 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 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 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.