37 results about "Shadow mapping" patented technology

The invention discloses a multi-modal knowledge graph construction and intelligent fault diagnosis method and system for a communication power supply system. The method comprises the steps of multi-modal knowledge graph construction, graph increment updating and intelligent fault diagnosis. The multi-modal knowledge graph construction adopts a unified data acquisition semantic specification and a heterogeneous data fusion strategy, a dynamic evolution heterogeneous graph is established, and equipment full life cycle state perception and causal link modeling are realized; the efficient, atomicity and consistency updating of the atlas is realized by the hierarchical atlas increment through shadow composition, structural difference rate calculation and a subgraph replacement mechanism; according to the intelligent fault diagnosis, an alarm propagation sub-graph is constructed, a path convergence and multi-dimensional attribute scoring mechanism is adopted, and deep joint verification is carried out by using a multi-modal evidence fusion network; and in combination with a reinforcement learning optimization strategy embedded based on a graph structure, adaptive scheduling and diversity constraint of a diagnosis path are realized, and the fault positioning accuracy and the system intelligence in a complex scene are remarkably improved.

The invention discloses an airspace engine 3D printing deformation compensation method. The method comprises the following steps that S1, a three-dimensional CAD model is constructed, and a printing layer set is generated; s2, obtaining residual stress tensor fields of the current printing layer and the historical printing layer; s3, constructing a stress shadow mapping tensor; s4, inputting the stress shadow mapping tensor and the current printing layer parameter into the reverse stress propagation neural network model, and outputting a deformation prediction vector field; s5, performing geometric compensation processing on the geometric area of the printing layer according to the deformation prediction vector field; s6, generating a printing code according to the compensated geometric model; and S7, carrying out error comparison on the actual deformation vector field and the overall prediction deformation vector field, if the error is greater than a preset tolerance threshold value, feeding back error information to the step S5, and repeatedly executing the steps S5 to S7 until the error vector field does not exceed the tolerance threshold value. According to the method, residual stress modeling and the reverse stress propagation neural network are fused, and 3D printing deformation compensation of the airspace engine is achieved.

The invention provides an image rendering method, relates to the technical field of artificial intelligence, in particular to the technical fields of computer vision, deep learning, large models, augmented reality and the like, and can be applied to scenes such as three-dimensional reconstruction and the like. According to the specific implementation scheme, a target grid model is generated based on a three-dimensional Gaussian sputtering model, the three-dimensional Gaussian sputtering model comprises a plurality of Gaussian points used for describing an object to be rendered, and the target grid model comprises respective target patches of the Gaussian points; the transparency of the middle area of the target patch in the target mesh model is lower than that of the peripheral area of the target patch; taking the target grid model as a mask to project a shadow, and obtaining a shadow map of the to-be-rendered object under a predetermined resolution; rendering the to-be-rendered object based on the three-dimensional Gaussian sputtering model and the shadow map to obtain a rendered target image; and displaying the rendered target image. The invention further provides an image rendering device, electronic equipment and a storage medium.

The invention provides a shadow map generation method and device, electronic equipment and a computer storage medium, and the method comprises the steps: determining an influence value of a light source on an entity for each light source according to the illumination intensity of the light source and the distance between the light source and the entity after obtaining the light source information of each light source; the method comprises the following steps: taking a light source with the maximum influence value on an entity in all light sources as a main light source, then obtaining a depth map of the entity shot by a depth camera at the main light source and a rendering picture of a virtual camera, and then generating a scene depth map under the main light source according to the rendering picture; and finally, generating a first shadow map according to the depth map of the entity and the scene depth map under the main light source. In the actual application process, after the first shadow map is obtained, the first shadow map acts on the output picture of the virtual camera, so that the output virtual scene and the entity are combined more naturally, and the shooting effect is better.

The invention discloses a 3D digital human mixed shadow generation method and system, a medium and equipment, and the method comprises the following steps: S1, main shadow generation: carrying out the real-time light tracing of a main light source, and generating a main shadow; s2, secondary shadow generation: generating a secondary shadow for the dynamic scene by using cascade shadow mapping; s3, soft shadow and penumbra processing: generating a soft shadow by using percentage asymptotic filtering or variance shadow mapping; s4, global illumination shadow: calculating the influence of indirect illumination on the main shadow, the secondary shadow and the soft shadow by using a real-time global illumination technology, and generating a global illumination shadow; s5, dynamic shielding processing: detecting the shielding relationship between the digital person and the environment in real time, and adjusting the generation algorithms of the main shadow, the secondary shadow and the soft shadow; s6, model optimization: using a deep learning model to carry out noise reduction or resolution improvement on the shadow; and S7, shadow synthesis: synthesizing the main shadow, the secondary shadow, the soft shadow and the global illumination shadow. The method has the advantages of improving the shadow quality and ensuring the real-time interaction of the shadow.

This invention provides a method and apparatus for shadow processing. The method includes: acquiring multiple first shadow maps baked under the condition that the angle of the target 3D model relative to the lighting direction monotonically changes for a target 3D model; performing interpolation calculations on the multiple first shadow maps to obtain multiple second shadow maps; merging the multiple first shadow maps and the multiple second shadow maps to obtain a third shadow map; and rendering the target 3D model in combination with the third shadow map. This invention optimizes shadow rendering, avoids the performance overhead of rendering the entire scene at the light source location, and improves the accuracy of shadow rendering.

The invention discloses a navigation interface rendering method, a mobile device and a storage medium. The method comprises the following steps: in a rendering process of a navigation interface corresponding to the mobile device, in response to a received shadow rendering instruction of the navigation interface, obtaining at least one initial object in a navigation scene corresponding to the navigation interface; screening the at least one initial object based on the first relative position information and the second relative position information to obtain at least one target object; generating a shadow map of the at least one target object based on the first relative position information and the second relative position information of the at least one target object; and rendering the shadow map to a target position corresponding to the at least one target object in the navigation interface. The technical problem that the rendering effect of real-time shadow rendering is poor in the prior art is solved.

A method for real-time shadow rendering using cached shadow maps and deferred shading by a video processor of a game console or the like includes, for at least each key frame of video output, determining a viewpoint for a current key frame based on user input, filtering a texel of a frame-specific shadow map based on a dynamic mask wherein the texel is filtered, for a shadowed light, from a static shadow map and a dynamic shadow map or from the static shadow map only, based on the dynamic mask value for the texel, and rendering the current key frame based on the frame-specific shadow map and a deferred-shadow rendering algorithm. The method enables efficient rendering of thousands of shadowed lights in large environments by consumer-grade game consoles.

This disclosure provides a method, apparatus, computer device, and storage medium for generating textures. The method includes: acquiring a three-dimensional model of a target object, an original shadow texture corresponding to the three-dimensional model, and a shadow tendency texture; performing a correction process on the original shadow texture based on the lighting direction corresponding to the three-dimensional model to obtain a target shadow texture corresponding to the three-dimensional model; and performing a light and shadow mapping process on the target shadow texture using the shadow tendency texture to obtain a shadow color texture corresponding to the three-dimensional model.

An embodiment of the present invention provides a method, apparatus, device, and storage medium for shadow production. The method includes: determining the distances between the vertices of each model in a scene and a preset light source respectively; obtaining the depth values corresponding to the vertices of each model respectively; determining the shadow states corresponding to the vertices of each model respectively based on the distances and the depth values, where the shadow state is used to indicate whether the corresponding vertex is in the shadow; and recording the shadow states corresponding to the vertices of each model in the color attributes of each vertex. By adopting the present invention, after the game is produced, the installation package of the game carries the color attributes of the vertices of the model, and the shadow states corresponding to the vertices of the model are recorded in the color attributes. Further, during the running of the game, the shadow states corresponding to the corresponding vertices can be read from the color attributes of the vertices of the model. Since no dedicated baked shadow map is added to the installation package of the game, the data volume of the installation package will be greatly reduced.

The invention relates to the technical field of video fusion, and discloses a video fusion method and system based on a shadow map and a program product, and the method comprises the following steps: creating a virtual perspective camera in a three-dimensional scene, and generating the shadow map according to a visual cone of the virtual perspective camera; pixels in the three-dimensional scene are converted from a visual space coordinate system of a physical world camera to a virtual perspective camera coordinate system, NDC coordinates of the pixels are obtained, the NDC coordinates are aligned with texture coordinates of the shadow map, and sampling texture coordinates are obtained; judging whether the pixels in the visual range of the virtual perspective camera are in the visual area of the shadow map or not, and obtaining the color of the current pixel of the three-dimensional scene; and obtaining the color of the current pixel of the fused three-dimensional scene. According to the invention, the problems of shielding area processing errors and the like in the prior art are solved.

The application provides an LCD debugging method, device and equipment. The method isolates the asynchronous parameter update of the device tree plug-in and the synchronous display clock domain of the physical register by establishing a shadow register mapping area in the Linux kernel, and limits the writing path of the physical register. Without triggering the power switching or the driving re-measurement, the shadow mapping area parameters are synchronized to the physical register by listening to the V-Sync signal and using the atomic transmission instruction in the vertical blanking period, so that the incremental debugging parameters are re-locked as a whole in the display frame scanning gap. The application effectively avoids the display timing conflict caused by the partial effect of the parameters, realizes the non-sensing and real-time effect of the LCD parameters in the state of maintaining the display activation, and significantly improves the debugging efficiency and system stability.

The present application proposes an image rendering method, device, electronic device and storage medium, which relate to the field of image processing technology. For a virtual object in a target image, a target projection matrix of the virtual object under a spherical light source cone is calculated, and then a target shadow map corresponding to the virtual object is generated according to the target projection matrix, so that the target shadow map is rendered to the target image; in this way, the same shadow map can be located in the same cone during the projection generation process, so as to avoid a fault between two adjacent cones and improve the rendering effect of the shadow map.

The embodiment of the invention discloses a shadow drawing method and device, equipment and a storage medium, and relates to the field of virtual environments. Comprising the following steps: determining a target virtual object in a virtual environment; a first shadow map and a second shadow map corresponding to the target virtual object are generated, the first shadow map is a shadow map including the target virtual object, and the second shadow map is a shadow map including other environment elements except the target virtual object in the virtual environment; the resolution of the first shadow map is higher than that of the second shadow map; a first shadow is drawn on the surface of the target virtual object based on the first shadow map, a second shadow is drawn on the surface of the target virtual object based on the second shadow map, and the shadow quality of the first shadow is higher than that of the second shadow. The shadow of the target virtual object is composed of the first shadow and the second shadow.

A map generation method and apparatus, a medium, an electronic device and a program product, and relates to the technical field of image processing, the method comprising: acquiring a shadow map, the shadow map comprising shadow information of each pixel on the surface of a target model; based on the shadow map, a height map is generated, and the height map comprises height information of each pixel on the surface of the target model; the first normal map is generated based on the height map, and the generation of the first normal map is controlled by the shadow map, so that the change of the generated first normal map can be intuitively observed by adjusting the light and shade change of the surface of the target model in the shadow map, the iteration process of the first normal map is efficient and intuitive, and the iteration efficiency of the target model is improved. And the time for repeatedly iterating the first normal map is reduced, so that the generation efficiency of the first normal map is improved.

The invention discloses a shadow map optimization method based on a screen space shadow, and the method comprises the following steps: S1, rendering a three-dimensional scene from the perspective of a light source, generating a shadow map, and obtaining the depth information of each pixel of the shadow map from the light source to the nearest point of the surface of the scene; s2, selecting a large shadow offset and a small shadow offset; s3, for each pixel p in the rendered three-dimensional scene, comparing the actual distance from the pixel p to the light source with the corresponding depth information stored in the shadow map in the step S1, and introducing a large shadow bias and a small shadow bias to generate different shadow factors; s4, for pixels in the dangerous area, calculating a shadow factor by using a screen space shadow; and S5, calculating a final shadow application factor of the pixel. By using the method, the shadow with high quality and better visual effect can be generated.

According to examples, a network control apparatus executes the live migration of a source bare-metal instance backed by a source software defined networking (SDN) appliance to a destination bare-metal instance associated with a destination software defined networking (SDN) appliance while minimizing data path downtime. The network control apparatus initially performs network allocations which include creating a shadow mapping. The network control apparatus triggers a forwarder on the source SDN appliance to forward data packets from network hosts destined for the source bare-metal instance to the destination SDN appliance until live migration is completed or mapping policy is updated. The mapping policy is updated by deleting shadow mapping when the live migration is complete and the source bare-metal instance is de-allocated and removed. The network control apparatus executes the live migration while minimizing the data path downtime so that applications on the destination bare-metal instance may continue to execute with minimal or no interruptions.

The present invention discloses a method for compensating for deformation in 3D printing of aerospace engines, comprising the following steps: S1, constructing a three-dimensional CAD model and generating a set of printed layers; S2, obtaining the residual stress tensor field of the current printed layer and the historical printed layers; S3, constructing a stress shadow mapping tensor; S4, inputting the stress shadow mapping tensor and the current printed layer parameters into an inverse stress propagation neural network model, and outputting a deformation prediction vector field; S5, performing geometric compensation processing on the geometric area of ​​the printed layer based on the deformation prediction vector field; S6, generating a printing code based on the compensated geometric model; S7, comparing the actual deformation vector field with the overall predicted deformation vector field; if the error is greater than a preset tolerance threshold, feeding the error information back to step S5, and repeating steps S5 to S7 until the error vector field does not exceed the tolerance threshold. The present invention integrates residual stress modeling and inverse stress propagation neural network to achieve deformation compensation in 3D printing of aerospace engines.

The invention relates to an image rendering method and device, equipment and a storage medium, and the method comprises the steps: obtaining a target direction map and a target fusion map corresponding to a target virtual object in response to an image rendering instruction; the target fusion map is obtained by performing fusion processing on a target color map and a target shadow map corresponding to the target virtual object; obtaining target attribute information of the target virtual object, and determining color information of indirect light based on the target fusion map; performing indirect light highlight processing on the target direction map, the target attribute information and the color information of the indirect light based on physical rendering to obtain an indirect light highlight result corresponding to the target virtual object; and rendering based on the indirect light highlight result to obtain a target image corresponding to the target virtual object. According to the invention, highlight rendering of the image of the virtual object is realized, and the rendering texture of the image is improved.

The invention relates to the technical field of dynamic light and shadow art expression, in particular to an art expression method based on dynamic light and shadow, which comprises the following steps: setting an adjustable light source system, a projection surface and a dynamic adjusting mechanism, and establishing a basic light and shadow mapping reference link through a joint calibration light source module; dynamically adjusting the angle and distance between the light source and the projection surface to excite a multi-dimensional light and shadow mode; a shielding object is arranged between a light source and a projection surface, a light and shadow effect model containing distance and angle variables of the shielding object is constructed through stepping measurement, and finally a correction model is obtained through fitting by using a nonlinear least square method. The method can quantify the influence of light and shadow changes on visual perception, solves the problem of insufficient flexibility in the prior art, and provides theoretical and technical support for dynamic light and shadow artistic presentation in the fields of buildings, stages, movies and televisions and the like.

The disclosure provides a shadow map generation method and device, computer equipment and a storage medium, and the method comprises the following steps: obtaining a three-dimensional model of a target object and an original shadow map corresponding to the three-dimensional model; determining a light model corresponding to the three-dimensional model based on the three-dimensional model and a light direction corresponding to the three-dimensional model; the light model is used to represent the shadow degree information corresponding to each vertex of the three-dimensional model; and performing a light direction correction process on the original shadow map by using the light model to obtain a first target shadow map of the three-dimensional model.

The invention provides a shadow generation method based on geographic information and a related device, and by implementing the shadow generation method based on geographic information provided by the embodiment of the invention, a corresponding key shadow map can be generated only for a game scene at a key time point; and the game scene can be rendered based on the time node and the key shadow map corresponding to the user operation instruction, so that the operation burden of the terminal equipment is reduced, the game scene is ensured to have a real and three-dimensional reality effect, and the game experience of the user is also ensured.

According to examples, a network control apparatus executes the live migration of a source bare-metal instance backed by a source software defined networking (SDN) appliance to a destination bare-metal instance associated with a destination software defined networking (SDN) appliance while minimizing data path downtime. The network control apparatus initially performs network allocations which include creating a shadow mapping. The network control apparatus triggers a forwarder on the source SDN appliance to forward data packets from network hosts destined for the source bare-metal instance to the destination SDN appliance until live migration is completed or mapping policy is updated. The mapping policy is updated by deleting shadow mapping when the live migration is complete and the source bare-metal instance is de-allocated and removed. The network control apparatus executes the live migration while minimizing the data path downtime so that applications on the destination bare-metal instance may continue to execute with minimal or no interruptions.

The embodiment of the invention provides a read-write verification method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of testing. A to-be-tested module and a test model are arranged in the electronic equipment, a read-write operation table is arranged in the to-be-tested module, and a shadow mapping table corresponding to the read-write operation table is stored in the test model; obtaining a read-write signal of the to-be-tested module for the read-write operation table; if the read-write signal is a read signal, performing read operation verification on the read signal according to a preset read operation in the test model; and if the read-write signal is a write signal, performing write operation verification on the write signal according to a preset write operation in the test model, and updating the shadow mapping table according to the write signal under the condition that the write signal verification is successful, so that the shadow mapping table is consistent with the read-write operation table. Therefore, the limitation of a time sequence can be eliminated, and the coupling between the to-be-tested module and the test model is reduced, so that the verification workload is reduced, and the universality and reusability of verification are improved.

The application discloses an information processing method and device, a storage medium and an electronic device. The method comprises the following steps: determining a scene region of a virtual scene and contour information of a virtual character in the virtual scene; dividing the scene region based on the contour information to obtain a plurality of sub-scene regions, wherein the contour of each sub-scene region is larger than the contour of the virtual character; baking a first virtual object contained in the sub-scene region to obtain a first depth map of the first virtual object; creating a first shadow map by using the first depth map; and rendering and displaying a first target shadow performance on the virtual character based on the first shadow map, wherein the first target shadow performance is a shadow formed by the first virtual object on the virtual character. The application solves the technical problem that a shadow effect conforming to the requirements of a virtual scene cannot be achieved.

The invention provides a shadow map drawing method and device, equipment and a storage medium. The method comprises the steps of obtaining light source distribution information; sending a drawing instruction, the light source distribution information, the light source information of the N light sources and the scene data of the target virtual scene to a graphics processing unit (GPU); the scene data comprises model vertex data of each virtual object in the target virtual scene; according to the light source information of the N light sources and the model vertex data of each virtual object, the GPU determines candidate light sources of which the light rays intersect with the virtual object for each virtual object in the N light sources; and in response to the drawing instruction, drawing, by the GPU, a shadow map of a shadow formed by the candidate light source on the virtual object on the map allocated to the candidate light source based on the light source information of the candidate light source determined for the virtual object and the model vertex data of the virtual object. By adopting the method, a plurality of shadow maps can be drawn after one drawing instruction is transmitted, so that the drawing efficiency of the shadow maps is effectively improved.

This application discloses an information processing method, apparatus, storage medium, and electronic device. The method includes: determining, within a scene area of ​​a virtual scene, that a first virtual object moves to a sub-scene area; in response to the first virtual object being between a virtual character in the virtual scene and a second virtual object in the sub-scene area, fusing a first depth map of the first virtual object with a second depth map of the second virtual object to obtain a target depth map, wherein the second virtual object is in a stationary state; creating a shadow map using the target depth map; and rendering and displaying a target shadow representation on the virtual character based on the shadow map, wherein the target shadow representation is a shadow formed by the first virtual object and the second virtual object on the virtual character. This application solves the technical problem of low efficiency in shadow generation for virtual characters.

The invention provides a game interaction control method and device and electronic equipment. A target game element is triggered, a triggering influence area is determined based on a triggering position, and a target layer resource is determined from multiple layer resources corresponding to the position where the target game element is located; performing expansion processing on image resources located in the trigger influence area in the target layer resources to obtain expanded target layer resources; fusing a plurality of shadow maps determined based on the trigger position and the target layer resource to obtain a fusion result, and obtaining a target shadow map based on the fusion result; based on preset direction information, texture offset is carried out on image resources, located in the triggering influence area, in the expanded target layer resources, and the offset target layer resources are obtained; and displaying a final display resource obtained by integrating the offset target layer resource and the target shadow map so as to simulate a pressed effect of the target game element. By means of the mode, physical operation consumption can be small, and the reality sense of game element deformation simulation can be improved.

The application provides a 3D vector reconstruction method for millimeter wave radar high-voltage line detection, and belongs to the technical field of millimeter wave radar collision avoidance. Specifically, the method enhances the authenticity of a three-dimensional image through vector reconstruction and shadow map secondary rendering, and displays the position of a high-voltage line in real time through coordinate interpolation and coordinate conversion, and continuously updates the high-voltage line detected by a radar. The method can effectively solve the problem of visualizing and navigating the high-voltage line information detected by a millimeter wave radar, improve the reliability of high-voltage line warning, and ensure the safety of helicopter flight.