30 results about "Shadowings" patented technology

This invention provides a dust concentration detection device and measurement method for underground drilling in coal mines. It includes a hemispherical glass body with an open top, containing a cleaning unit. The cleaning unit includes a vertically arranged annular cleaning frame, the center of which is collinear with the axial centerline of the glass body. A motor support frame is coaxially mounted on the top of the glass body, forming a spherical body with a hollow top. The bottom of the motor support frame is connected to the glass body, and its vertical top is connected to a coaxially mounted sleeve. An explosion-proof motor is also coaxially mounted inside the sleeve, with its output shaft connected to the top of the cleaning frame. The output shaft drives the cleaning frame to rotate around the central axis of the glass body. A point light source is also coaxially mounted on the inner top of the cleaning frame. A shadow sensor is also installed on the outer bottom wall of the glass body. The device of this invention has a fast response speed and can quickly capture instantaneous shadow changes, thereby achieving real-time continuous measurement.

This invention discloses an efficient 2D dynamic soft shadow rendering method and system based on symbolic distance fields, belonging to the field of computer graphics and image processing technology. It includes extracting displacement vectors to determine active occlusions and generating bounding boxes to be updated; downsampling and reconstructing within the bounding boxes and concatenating with an external buffer to generate a low-resolution symbolic distance field; calculating a local original resolution symbolic distance field within the same region; calculating and normalizing the difference matrices of the two types of distance fields to generate a fusion weight matrix; and using the weight matrix to weightedly superimpose the two types of distance fields, performing ray propagation to output shadow textures. This invention uses bounding boxes established based on inter-frame displacement vectors to lock dynamic regions and constructs pixel-by-pixel fusion weights through multi-level resolution distance difference matrices to achieve smooth superposition of heterogeneous field data. This significantly reduces scene reconstruction overhead while eliminating visual seams caused by incremental updates, outputting high-quality and spatiotemporally continuous 2D soft shadow effects.

An automated lighting system for operating rooms that aims and focuses light into a work area while eliminating shadows. Mounted to a boom system, akin to traditional operating room lights, or a specially made frame, adjustments to the lighting can be made conveniently, with little or no manual adjustment of the lights. The disclosed automated lighting system allows a surgeon to easily define a target region with some type of user interface, then lights automatically adjust based on the surgeon defined target region to illuminate the target region.

The application provides a rendering method and device of indoor shadow and electronic equipment, determines a first intersection point of a target pixel point on a window model along a viewing angle direction and an indoor plane; determines a second intersection point of the first intersection point along a light direction and the window model; determines a first shadow value and a second shadow value of the first intersection point according to the second intersection point and a preset window map; determines a third shadow value of the first intersection point according to the occlusion of an outdoor object and the first intersection point in the light direction; and renders the indoor plane based on the first shadow value, the second shadow value and the third shadow value. In this way, the light transmittance of the window and the light occlusion of the outdoor object are used to determine the wall shadow of the indoor plane, the window frame shadow and the shadow of the outdoor object in the indoor plane, so that the light and shadow effects in the virtual scene are more realistic, and the virtual scene is more realistic, immersive and experienced.

This lighting device reduces the weight of individual components, improving ease of installation and facilitating safety during operation. [Solution] Multiple lighting devices 11 are installed as light sources, and the mounting frame 20, panel, and cover are installed as separate components, thereby reducing the size and weight of each component and improving ease of installation. Furthermore, the effects of uneven lighting and shadows are suppressed by the degree of diffusion of the panel and the spatial distance between the light source and the panel.

The embodiment of the application discloses a shadow generation method and related device, the method comprises the following steps: obtaining the depth data, normal data and illumination data of each point in a virtual scene as the shadow reference data of each point; inputting the shadow reference data of each point into a first convolution filter to obtain the basic shadow data of each point output by the first convolution filter; determining the half-shadow intensity of each point according to the distance from each point to a virtual light source in the virtual scene and the propagation distance of a virtual light emitted by the virtual light source; weighting the basic shadow data of each point by using the half-shadow intensity of each point to obtain the weighted shadow data of each point; and the weighted shadow data is used for shadow rendering for the points. The method can improve the setting efficiency of the shadow effect, and reduces the required artificial cost and time cost.

A roofing shingle for installation as part of a roofing structure includes at least one layer of a shingle material having a top surface and a bottom surface. The roofing single will include a headlap portion and an exposure portion having a plurality of tabs with a plurality of granules being applied along the top surface. Shadow lines are defined at selected locations along the top surface of the roofing shingle to provide the roofing shingles with a selected visual appearance.

The application provides a thermal power plant photovoltaic layout method and system, BIM data and GIS data are acquired, preprocessed, and the preprocessed data is deeply fused to construct a fusion model; based on the fusion model, a shadow area is determined, and the shadow area is divided into static fixed shadow, dynamic temporary shadow, time sequence gradual change shadow and superimposed complex shadow; for the four types of shadows, an adaptive artificial intelligence model is constructed, and quantitative analysis of various shadows is realized according to the artificial intelligence model; the shadow analysis results are spliced to form the total shadow analysis result, and the best photovoltaic array layout is determined through multi-objective optimization algorithm combined with GIS spatial analysis, photovoltaic component technical parameters and engineering constraint conditions, specifically, the accurate quantification of shadow characteristics is realized through the creative shadow analysis logic, the best photovoltaic array layout is determined combined with fusion modeling and multi-objective optimization, and the photovoltaic power generation efficiency is improved.

The application discloses a kind of construction progress remote sensing monitoring methods based on improved shadow index, it is related to remote sensing image processing technical field, including obtaining research area remote sensing image sequence and carrying out time series registration, by extracting stable scene feature to carry out dynamic scene correction;Preprocessed image is converted to multiple color spaces and selects optimal channel combination;Based on local change gradient and overall gray distribution, construction area shadow extraction index is constructed;Optimal segmentation threshold is calculated to obtain shadow binary image;Extraction contour boundary point feature carries out shadow segmentation and region growth;Based on shooting parameter and building three-dimensional geometric constraint, multi-view joint optimization equation is established, and the actual height of building is obtained by iterative solution.The application can effectively handle building shielding situation, improve shadow extraction precision and building height calculation accuracy.

This invention relates to the fields of image processing and computer vision technology, specifically disclosing a maskless image shadow removal method based on illumination-guided dual-stream Mamba. The method includes: passing the shadow image through a feature encoder, and then, based on Retinex theory, obtaining illumination flow features and reflectance flow features through a feature decoupling mapping operator; passing the illumination flow features through an illumination prior Mamba module to obtain illumination prior features; inputting the reflectance flow features and illumination prior features into an illumination-guided reflectance Mamba module to obtain a reflectance feature representation under illumination prior constraints; and inputting the illumination prior features and reflectance feature representation into a decoder to obtain a shadow-free image. This invention, by explicitly introducing illumination physical priors and reconstructing the feature sequence organization, achieves differentiated modeling of shadow and non-shadow regions without relying on shadow masks, significantly improving the structural consistency and color fidelity of the shadow removal results.

1. Name of the product in this design: Neck Pattern Lamp (BGD2). 2. Purpose of this design: To reduce neck wrinkle shadows and improve neck wrinkles through light therapy during live streaming and photography. 3. The key design features of this product are its overall shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

Disclosed herein are systems (203) and methods (600) for transforming real-world entities shadow and reflection in extended reality device. Initially, semantic information associated with a field of view (FOV) of the XR device (201) is determined. Further, a plurality of attributes for generating one or more virtual appearances corresponding to the at least one of the shadow and the reflection of the one or more real world entities are determined. Further, the one or more virtual appearances are generated. Finally, the one or more virtual appearances are overlaid on the image of the FOV such that the at least one of the shadow and the reflection of the one or more real-world entities is transformed.

The utility model discloses a three -section type horizontal silkworm pen relates to cosmetic technology field. Including shadow section, brightening section and pearl bright piece section, shadow section tail part is connected with brightening section tail part, and brightening section head is connected with pearl bright piece section tail part. Brightening section and pearl bright piece section head are provided with same direction, and shadow section head is opposite, and it is convenient to distinguish and avoid confusion fast. Three sections are coaxial in turn and are detachable to adjacent section. The different function of each section corresponds to the horizontal silkworm creation: shadow section moulds the outline level, and brightening section increases fullness and luster, and pearl bright piece section promotes the delicate degree and the shining degree. The detachable setting makes three sections combination and is stored, and the space of three independent pens is smaller, and it is convenient to carry. The user can use a section according to the makeup demand alone, and when the consumable of a section is used up, can replace alone, prolongs the product life, and reduces the use cost.

This invention discloses a method for heat regulation of snow shelters based on snow-covered feature image recognition, belonging to the field of image recognition technology. The method includes the following steps: acquiring a continuous image brightness change sequence of the snow shelter surface; extracting brightness values ​​at different time points for the same spatial location; constructing a brightness time evolution matrix corresponding to each spatial location to characterize the change law of the snow shelter surface brightness over time; and based on the brightness time evolution matrix, trajectories are marked for regions where the brightness shows a continuous decreasing trend in the time dimension and a continuous translation feature in the spatial dimension, forming a shadow migration region sequence. This invention eliminates dynamic shadow interference by constructing a brightness time evolution matrix, avoiding heat distribution shifting with shadows, and achieving accurate identification and stable heating of the actual snow-covered area. Simultaneously, it dynamically monitors the melting trend during heating, increasing heat intensity when stagnation occurs to suppress ice shell formation and improve operational safety.

The utility model relates to a kind of operating room's lighting shadowless lamp applied to medical instrument field, including shadowless lamp body, the outer surface of shadowless lamp body is fixedly equipped with mounting ring, the upper end of mounting ring is carved with multiple installation grooves, the inner wall of installation groove is fixedly connected with magnetic block one, the surface of magnetic block one is fixedly embedded with connector one, shadowless lamp body is externally provided with multiple vice lamps, the upper end of vice lamp is fixedly connected with adjusting lever, the end of adjusting lever away from vice lamp is fixedly connected with clamping assembly, on the basis of original shadowless lamp body, add a mounting ring, through annular clamping groove multi-angle layout, according to the visual blind area of shadowless lamp body, temporarily add vice lamp to carry out light supplement, effectively solve the problem of single direction of main light source, effectively eliminate deep shadow on the basis of not damaging original structure, compared with adding a new shadowless lamp, the cost of the application is greatly reduced, and simple operation is easy to use.

Systems and methods for mitigating shadow segments from images are provided. One example computer-implemented method includes accessing an original image of a geospatial location including a first shadow segment and generating, using a model architecture, a matte for the original image. The method also includes generating a first histogram of tones of shadow pixels of the first shadow segment in the original image, generating a second histogram of tones of an adjacent region of the original image, which is proximate to the first shadow segment yet outside a boundary of the first shadow segment, defining a lookup table based on histogram matching between the first histogram and the second histogram, and relighting the original image based on the lookup table.

The application discloses a lunar polar region sequence image navigation method based on shadow features. Two adjacent sequence images are binarized, stable shadow regions are extracted and subjected to morphological erosion treatment, each connected domain formed by the shadow regions is obtained and a centroid thereof is calculated; each connected domain is screened by using the area size of the connected domain and the distance between the shadow centroid and the image edge, stable shadow features are obtained, and a descriptor is constructed therefrom; the shadow features are matched by using the descriptor, and the matching results are judged to reserve the centroid meeting the conditions as the final matching result; the relative position and pose of an aircraft between two adjacent images are solved by using a homographic matrix decomposition according to the matching results of the shadow features on the two adjacent images; and the real physical scale information of the relative position between the sequence images is recovered according to prior height information of a laser sensor; the above steps are repeated for two adjacent images in sequence images, and the position information of the aircraft at each imaging point is obtained.

The application discloses a real-time dynamic light rendering optimization method based on Unreal Engine, and relates to the field of light rendering. Firstly, based on a camera view cone and AI context data, shadow importance scores are assigned to each mesh object in a scene, and potential shadow casters are prioritized. Then, performance budget evaluation is performed in combination with the current frame rate and GPU load, and intelligent shadow projector selection and LOD application are performed on the sorted shadow caster list accordingly. Finally, these optimized rendering shadow batches are sent to the light perspective rendering and VSM page filling processes to generate movable light source optimized virtual shadow. This method significantly reduces unnecessary computational overhead, thereby greatly improving rendering efficiency and frame rate stability while ensuring high-quality dynamic light effects, effectively solving the core problem of balancing traditional performance and quality.

The present disclosure provides a system and method for detecting and classifying shadows in a physical environment. The system includes one or more processors and a memory storing executable instructions. The system receives an image of a physical environment from one or more sensors of a user device, generates a depth map of the environment, and detects one or more shadow regions using a trained shadow detection model. The system classifies the image as a first or second shadow-type scene based on a generated shadow mask and the depth map. The system analyses light-ray distribution applies mathematical or HDRI-based estimation for light parameters, and maintains temporal coherence across sequential frames. The system outputs scene-classification data that triggers selection of a rendering or harmonization pipeline to ensure accurate lighting adaptation in mixed-reality environments.

This invention provides a generative data augmentation method for industrial anomaly detection based on light and shadow decoupling and edge constraints. First, a generative model generates light and shadow components aligned with the geometric topology of the original image. These components are then superimposed back onto the original image based on intrinsic image decomposition theory, rather than directly generating a complete target image. Spatial constraint protection is introduced by extracting the edge contours of the original image as hard constraint inputs, forcing the latent diffusion model to perform light and shadow rendering within a specific topological range, thereby ensuring that the generated shadow mask accurately matches the original geometry of the component. Differentiated optical fusion strategies are employed for different industrial simulation scenarios, matching specific optical mixing functions according to the illumination type. This invention, employing the aforementioned generative data augmentation method for industrial anomaly detection based on light and shadow decoupling and edge constraints, completely eliminates feature drift and structural illusions, significantly improving detection accuracy under complex lighting conditions.

A building outer wall high-altitude detection method, system, product and medium, relate to image detection field, the method comprises: obtaining wall shooting image and parameter, calculating the solar elevation angle and azimuth angle according to time and geographic coordinates, combining the pan-tilt angle and wall orientation, the incident direction vector of sunlight in the wall coordinate system is obtained;The three-dimensional preliminary shadow boundary is calculated by using the three-dimensional geometric profile and groove depth of the decorative structure, and the shooting parameters are projected into the image coordinate system to obtain the theoretical shadow boundary;Identify suspected defect features in the shooting image, extract the centerline coordinates and extension direction, respectively calculate the angle deviation and position deviation with the theoretical shadow boundary;The physical consistency score is calculated by comprehensively considering the deviation and groove depth, and the defect detection result after removing the shadow interference is output. The method can accurately distinguish the building outer wall decorative shadow and the real defect, reduce the false detection rate, and improve the detection accuracy.

This utility model relates to an illuminated handle and a precision balance including the same. The illuminated handle includes: a mounting plate with a rotating shaft on it; a protrusion fixed on the rotating shaft, with a protrusion on one side; a long handle comprising a rotating part, a container part, and a light-emitting part connected in sequence, the rotating part being sleeved on the rotating shaft, and two recesses spaced apart along the circumference of the rotating shaft within the rotating part; after the handle is rotated to its position, the protrusions are engaged within the recesses to restrict the rotation of the handle; and a light-emitting mechanism including a power control component on the handle and a light-emitting component on the side of the light-emitting part facing the mounting plate, the power control component being used to make the light-emitting component emit light. The illuminated handle, which opens a transparent panel, is installed on the windproof cover of the precision balance, and can simultaneously illuminate the weighing platform, preventing shadows from hands and containers from affecting the user's observation of the materials on the weighing platform.

The present application belongs to the technical field of computer vision three-dimensional reconstruction, and particularly relates to a structured light shadow area recovery and reconstruction method based on kernel density estimation. The present application aims at the problem of shadow area generated by structured light when measuring objects with sharp height changes, and divides the measurement results into effective area and invalid area according to modulation intensity information; phase calculation and unwrapping are performed on the effective area, and for the invalid area, a kernel density estimation method is used to calculate a target vector set and construct a probability density function according to the phase information of the effective context pixels in the neighborhood, and the phase value of the shadow area is recovered by optimizing the objective function to minimize the context pixel phase prediction error and the local phase recovery error; the phase information is converted into three-dimensional coordinates in combination with the system calibration parameters, and three-dimensional topography measurement of the object is realized. The present application can effectively solve the problems of occlusion and shadow generated when measuring objects with large height difference, and improve the integrity of three-dimensional reconstruction.

This application discloses a method, apparatus, device, medium, and product for generating soft shadow maps, belonging to the field of 3D rendering. The method includes: obtaining a first mesh model corresponding to at least one virtual object in a virtual scene; increasing the number of vertices in the first mesh model corresponding to the at least one virtual object to obtain a second mesh model corresponding to the at least one virtual object; and generating a soft shadow map of the first mesh model corresponding to the at least one virtual object based on the second mesh model, wherein the soft shadow map is used to generate soft shadows for the at least one virtual object, and the soft shadow is a shadow with varying shadow parameters in the edge region. This method generates soft shadows based on the refined second mesh model corresponding to at least one virtual object, enabling the generation of more realistic soft shadow effects.

This invention provides a rapid method and system for detecting changes and assessing damage in remote sensing images for disaster emergency response. It relates to the fields of disaster emergency response and remote sensing technology. First, it acquires a set of post-disaster remote sensing image data covering the disaster-stricken area. Then, it retrieves the topological description set of the shadow area of ​​buildings and the surrounding land cover layout description set corresponding to the spatial location from a pre-disaster land cover structure knowledge base. Next, it performs geometric calculations of the spatial location of the shadow area based on angle parameters and building geometric information, extracting abnormal offset information of the shadow area. Then, it constructs an indirect evidence chain to identify suspected damaged building objects and generates a distribution map. Next, it performs damage pattern classification processing on the suspected damaged building objects, determines the damage type identifier, and calculates an initial damage degree score. Finally, it generates a damage assessment result dataset containing the spatial coordinates of the damaged buildings and damage level codes, enabling rapid and accurate assessment of building damage during disaster emergency response.