18 results about "Visibility determination" patented technology

This application relates to a method, apparatus, and medium for rapid simulation of forward-looking sonar coherent echoes. The method includes: acquiring a surface model and system parameters of a three-dimensional scene; performing visibility determination and propagation path solving based on the surface model and system parameters to generate an arrival set; constructing a sparse impulse response tensor and generating an upsampled domain coherent echo based on the arrival set and an upsampled time base; downsampling and aligning the upsampled domain coherent echo to the device sampling rate to obtain a coherent echo at the device sampling rate; performing simulation processing on the coherent echo at the device sampling rate and inputting it into a backend processing chain to output imaging results.

An evidence grid is established in a map frame based on the vehicle's pose. Hazard data is accumulated in the evidence grid by gathering visible grid cells, each associated with a visibility probability indicating a history of visibility determinations, and accumulating hazard presence, with each grid cell linked to a hazard associated with a hazard presence probability indicating a history of hazard presence determinations. The accumulated hazard data is then provided to a process within the autonomous vehicle for further decision-making or risk mitigation.

Embodiments of this disclosure provide a page information processing method, apparatus, plug-in control module, page processing method, storage medium, and electronic device. The page information processing method includes the steps of: receiving a page processing request containing page information; for each of a plurality of page styles, calling at least one visibility determination algorithm corresponding to each page style and determination parameters corresponding to each visibility determination algorithm to generate visibility determination logic for each page style; and performing determination processing on the page information based on the visibility determination logic of the plurality of page styles to obtain visibility determination results for the plurality of page styles. It supports the realization of differentiated visibility determination for different page styles and provides reusability of visibility determination algorithms because there may be overlaps in the visibility determination algorithms called for different page styles.

The invention provides a target visibility discrimination method in a multi-target scene and related equipment, and the method comprises the steps: detecting the target information of a plurality of targets, and for each target, determining the theoretical full view angle of the target based on the angular point coordinate information of the target; by taking the position of the sensor as an origin coordinate, determining whether the target meets a potential shielded condition or not according to the spatial center point coordinate of the target and the spatial center point coordinates of other targets; other targets indicate other targets except the target; for the target meeting the potential sheltered condition, calculating the difference value between the maximum azimuth angle of the target and the minimum azimuth angle of other targets to obtain a sheltering angle; and determining the visibility level of the target under the potential shielded condition according to the theoretical full field angle and the shielding angle of the target. Therefore, accurate identification and calculation can be carried out based on the target information of multiple targets, the visibility level of each target is obtained, and the calculation result is objective and accurate.

The application provides a safety control method and system for construction engineering and a storage medium. An image of a construction site is acquired, and the illumination intensity and visibility of the construction site are collected. A scaling coefficient of a target detection model is calculated according to the illumination intensity, and the weight of each input in a preset level of a bidirectional feature pyramid in the target detection model is determined based on the visibility. The image is input into the target detection model to obtain a candidate target and the confidence of the candidate target. The attention intensity is calculated by using the category of the candidate target and the spatial distribution of other candidate targets in the neighborhood of the candidate target. The non-maximum suppression parameter of each candidate target is obtained based on the attention intensity and the scaling coefficient. The non-maximum suppression parameter is used to perform non-maximum suppression processing on the candidate target to obtain an optimized candidate target. Whether a safety violation event exists is determined according to the category and positional relationship of the optimized candidate target. If the safety violation event exists, a corresponding safety control instruction is generated.

The invention provides a low-altitude flexible HMIMO-oriented spatial characteristic evaluation and port configuration method and system, and the method comprises the steps: constructing the array geometry of a flexible HMIMO array, and setting a user position and an electromagnetic propagation environment model; secondly, visibility judgment and gating processing are carried out on the sight distance model; then, the whole array is divided into sub-arrays, and available sub-arrays are screened out; calculating an autocorrelation matrix and quantizing a channel statistical difference distance between any two sub-arrays to generate a spatial non-stationary heat map; meanwhile, the full-aperture space freedom degree is calculated; and finally, obtaining an average achievable port mode number by taking a statistical expectation from a target direction domain, and obtaining a port configuration engineering upper bound by integrating a theoretical degree of freedom and hardware constraints. According to the method, the problems of spatial non-stationary quantization, sub-array availability judgment and port-level realizable mode number determination of the flexible curved surface array under near-field and shielding conditions are solved, and a direct basis is provided for engineering design and resource allocation of flexible HMIMO in low-altitude communication.

Disclosed in the embodiments of the present application are an image rendering method, an electronic device and a computer-readable storage medium. The method comprises: an electronic device acquiring a first parametric equation of a three-dimensional geometric solid, wherein the first parametric equation is used for describing the geometric solid in a three-dimensional virtual scene; performing rasterization on the three-dimensional geometric solid on the basis of the first parametric equation, so as to obtain a target pixel grid of the three-dimensional geometric solid on a screen plane, wherein the screen plane comprises pixel grids, the target pixel grid is a pixel grid located within a projected figure, and the projected figure is a figure obtained by means of projecting the geometric solid from the three-dimensional virtual scene onto the screen plane; and performing shading on shading points corresponding to the target pixel grid. In the embodiments of the present application, a three-dimensional geometric solid in a three-dimensional virtual scene is represented by means of a parametric equation, such that during rasterization based on the parametric equation, projection calculation and pixel visibility determination calculation of the three-dimensional geometric solid can be performed only once, thereby reducing the calculation complexity, and thus lowering the power consumption of a device.

The present application provides a graph drawing method and a related apparatus. The method can comprise: an electronic device can construct primitive SDFs and store the primitive SDFs as a global acceleration structure, and perform screen visibility determination and spatial visibility determination for pixel points in a screen by means of a gaze tracking method, so that finally visible primitives at the pixel points can be determined. Moreover, the dynamic effect of the primitives can be calculated by means of gaze tracking, and color values of the pixel points are finally determined. Finally, the electronic device can call a drawcall instruction on the basis of the calculation result to draw a first image frame. In this way, the drawing effect of the electronic device can be improved, and the power consumption of the electronic device can be reduced.

The application provides a vehicle speed limit value calculation method based on multi-factor coupling, comprising the following steps: acquiring a reference speed limit value v n ; determining a vehicle speed correction coefficient f according to the road surface slope, the road alignment, the traffic flow and the visibility; and calculating a vehicle speed limit value v according to the reference speed limit value v n and the vehicle speed correction coefficient f. The reference speed limit value is dynamically corrected by combining the road surface slope, the road alignment, the traffic flow and the visibility, so that the speed limit value can be timely adjusted to avoid potential dangers caused by fixed speed limits; and the corrected speed limit value is more in line with actual road conditions, so that traffic congestion and accident rates can be effectively reduced.

The invention provides a snowfall weather visibility determination method and determination device. The determination method comprises the following steps: acquiring snow particle size distribution data and snow particle shape classification data of a target observation area in snowfall weather in a preset sampling period; based on the snow particle size distribution data, determining snow particle spectrum distribution parameters of the target observation area; respectively determining a snowfall intensity value and a snow grain group extinction coefficient based on a snow grain parameterization coefficient and a snow grain spectrum distribution parameter corresponding to the snow grain form classification data; and based on the snowfall intensity value, the snow particle parameterization coefficient, the snow particle group extinction coefficient and the snow particle spectrum distribution parameter, determining a visibility value of the target observation area in a preset sampling period. By means of the method, unified calculation of various forms of classified snow particles under different observation conditions and climate areas is achieved, and adaptability, real-time performance, accuracy and efficiency of snowfall weather visibility calculation are improved.

This invention relates to the field of Lingqu Open Interconnection technology, specifically to an anomaly transaction handling system for third-party access objects in the Lingqu Open Interconnection system. The system includes an IO interconnection chip deployed between the third-party access object and the interconnection domain. The chip contains a transaction shadow maintenance module to establish shadow information for transactions in the execution path; an anomaly detection module to detect anomalies and prevent new transactions from entering; a resource visibility boundary determination module to determine whether incomplete transactions have crossed the visibility boundary based on the shadow information and the actual state of shared resources; a transaction classification and closure decision module to execute differentiated management strategies based on classification; and a service status output module to convert the management result into a controlled service status. This invention overcomes the defects of incomplete transactions being suspended, visibility misjudgment leading to semi-finished data, and unified error reporting leading to resource inconsistencies, achieving unified transaction management, differentiated closure, and reliable visibility determination in the event of anomalies.

The application discloses a visibility determination method and device, equipment and a storage medium, and relates to the technical field of databases. The method comprises the following steps: in response to a first visibility judgment event of a target transaction being triggered, obtaining a current cache value from transaction public cache data of a node, and obtaining a first cache commit sequence number snapshot, wherein the transaction public cache data comprises a global commit sequence number in a cached metadata node; determining a first target commit sequence number snapshot of the target transaction according to the first cache commit sequence number snapshot; performing initial judgment on the visibility according to the first target commit sequence number snapshot; and in the case that the initial judgment result is visible, determining that the visibility judgment result of the first visibility judgment event is visible. Through the above technical solution, the communication cost with the metadata node can be reduced, and the efficiency of the visibility determination and the transaction execution efficiency can be improved.

The invention discloses a target visibility determination method, apparatus and device, and a computer program product. The method comprises the steps of obtaining three-dimensional point cloud data and three-dimensional bounding box data including a target object, two-dimensional image data of at least one camera associated with the three-dimensional point cloud data, camera calibration parameters and a parameter configuration file; constructing a two-dimensional depth map corresponding to the two-dimensional image data according to the three-dimensional point cloud data, the two-dimensional image data and camera calibration parameters; generating a three-dimensional surface sampling point set of the target object according to the three-dimensional bounding box data of the target object; and according to the two-dimensional depth map, the three-dimensional surface sampling point set, the camera calibration parameters and the parameter configuration file, determining the visibility of the target object relative to the camera by using a visibility analysis strategy based on spherical projection so as to determine the visibility of the target object relative to the automatic driving system. According to the method, the visibility of the target is quantitatively analyzed by using a visibility analysis strategy based on spherical projection, and the robustness and accuracy of occlusion judgment are improved.

The application discloses a UAV flight path planning method and device, equipment and medium, and relates to the technical field of UAV flight path planning. The method comprises the following steps: constructing a three-dimensional flight path planning environment based on a preset terrain model and a preset meteorological environment threat model; determining a flight path of a UAV from the three-dimensional flight path planning environment by using a preset search algorithm and a visibility determination method; and performing smoothing processing on the flight path by using a cubic B-spline curve to obtain a smoothed flight path. In the constructed three-dimensional flight path planning environment, the flight path of the UAV can be planned to avoid various threat areas by using the preset search algorithm and the visibility determination method, and the flight path is processed by using the cubic B-spline curve to obtain a smoothed flight path, so that the flight path meets the actual flight requirements of the UAV.

The application discloses a visibility determination method, device, vehicle and computer readable storage medium; the visibility determination method comprises the following steps: acquiring a collected road image, wherein the road image comprises at least one lane line; identifying the position of the at least one lane line based on the collected road image, and identifying the position of an obstacle on the road; in the case that the position of at least one part of the at least one lane line is covered by the position of the obstacle, ignoring the data corresponding to the position of each lane line contained on the road and re-collecting the road image until the position of each lane line contained on the road is not covered by the position of the obstacle; in the case that the position of each lane line contained on the road is not covered by the position of the obstacle, determining the position of the farthest end point of each lane line in the road image, and determining the visibility based on the position of the farthest end point. The visibility evaluation difficulty can be reduced while ensuring the evaluation accuracy.

This invention provides a database transaction slot reuse method and related products. The method includes: based on the current transaction's access request to a B-tree index page, querying the transaction slot array maintained by the B-tree index page to find a target transaction slot matching the current transaction; if a target transaction slot is found, obtaining its transaction slot index for the current transaction to reference when inserting an index tuple; if no target transaction slot is found, checking the transaction slot array for a reusable transaction slot; if a reusable transaction slot exists, determining a set of reusable transaction slots, and selecting one from the cleaned-up set to store the transaction identifier of the current transaction; if no reusable transaction slot exists, creating a new transaction slot to store the transaction identifier of the current transaction. This invention achieves dual optimizations: lightweight index tuple storage and localized visibility determination.

The invention provides a BIM-based design construction drawing output efficiency optimization method, and belongs to the technical field of construction drawing output efficiency optimizing.According to the BIM-based design construction drawing output efficiency optimization method, component visibility judgment is accelerated by establishing a spatial octree index structure, and the rendering performance is optimized by adopting sight distance grading and a heterogeneous computing architecture; a component semantic recognition network is used for automatically recognizing component categories, a two-dimensional construction drawing conforming to specifications is generated in combination with a drawing rule base, and an improved shortest path pipeline optimization algorithm is applied to coordinate multi-objective optimization of path length and cross conflicts through a double-layer game model. Building information model data are updated according to the pipeline comprehensive arrangement result, iterative execution is triggered until the construction drawing meets the specification requirement, full-process automatic processing from a three-dimensional model to a two-dimensional drawing to pipeline comprehensive arrangement is achieved, and the technical problem that automatic conversion from the model to the drawing cannot be achieved when the BIM generates the construction drawing is solved.