48 results about "Visibility determination" patented technology

When a vehicle attempts to enter a priority road from a non-priority road, a visibility determination processing section compares moving object information on the priority road obtained from a first infrastructure facility installed near a stop position with moving object information on the priority road detected by an autonomous sensor mounted on the vehicle, and determines that the visibility is poor if the former does not match the latter or determines that the visibility is good if the former matches the latter. Then, when the former does not match the latter, the driver is informed of intersection support information. When the former matches the latter, the driver is not informed since it is determined that the driver has already recognized the information by visual observation.

An on-vehicle information provision apparatus is provided that visually provides a vehicle occupant with positional information on an object. The apparatus includes object setting device that sets the object, visibility determination device that determining whether or not the occupant can see the object and positional information display device that, when it is determined that the occupants can see the object, visually informs the occupant of an apparent position of the object within an actual landscape that is being seen by the occupant by displaying image information showing the object superimposed on the landscape.

The present invention provides a browser based mass three-dimensional point cloud data release method. The method comprises the following steps that S1. a bounding box of original three-dimensional point cloud data is calculated, and block division is carried out on the original three-dimensional point cloud data according to the bounding box and a regular grid division theory, so as to divide a plurality of block point cloud bounding boxes; S2. an octree is established for each block point cloud bounding box, and a description file is configured for each octree; S3. regular grid division is carried out on a point cloud octree, and a quadtree structure is established for the octree contained in each regular grid; and S4. a browser sends in real time a query request to a server, the server returns in real time an octree query result to the browser, the browser carries out visibility determination on the octree query result, and the visible octree is loaded, so as to complete dynamic loading and scheduling of mass three-dimensional point cloud data. According to the method disclosed by the present invention, web based release and visualization of mass large point cloud files are realized, and the problem that point cloud data is difficult to release is solved.

A system and method for determining graphical object visibility by utilizing ancillary geometry. When comparing visibility cones with bounding hulls of scene graph hierarchy leaf nodes, ancillary geometry may be used in place of the bounding hulls and the leaf node's actual geometry. The ancillary geometry may be created through a manual process, or by an automated decimation process. The ancillary geometry may be a simplistic analytic surface (e.g., a sphere or a cylinder), a NURB surface, a collection of polygons, or a combination of surfaces and polygons.

An endoscope system includes an image pickup section, provided in an endoscope, which performs image pickup, a determining section that determines whether or not a specific observation object exists inside an image pickup region of the image pickup section, a recognizing section that determines whether or not the specific observation object a recognized as an image from the picked-up image in the image pickup region picked up by the image pickup section, and a low visibility determination output section that determines, when the determining section determines that the specific observation object exists inside the image pickup region and the recognizing section cannot recognize the specific observation object as an image, that the image pickup section is in a low visibility condition and outputs a low visibility determination result.

A system and method for determining graphical object visibility by utilizing ancillary geometry. When comparing visibility cones with bounding hulls of scene graph hierarchy leaf nodes, ancillary geometry may be used in place of the bounding hulls and the leaf node's actual geometry. The ancillary geometry may be created through a manual process, or by an automated decimation process. The ancillary geometry may be a simplistic analytic surface (e.g., a sphere or a cylinder), a NURB surface, a collection of polygons, or a combination of surfaces and polygons.

An endoscope system includes an image pickup section, provided in an endoscope, which performs image pickup, a determining section that determines whether a specific observation object exists inside an image pickup region of the image pickup section, a recognizing section that determines whether the specific observation object can be recognized as an image from the picked-up image in the image pickup region picked up by the image pickup section, a low visibility determination output section that determines, when the determining section determines that the specific observation object exists inside the image pickup region and the recognizing section cannot recognize the specific observation object as an image, that the image pickup section is in a low visibility condition and outputs a low visibility determination result, and an obstacle estimation section that estimates an obstacle or a type of obstacle which causes the low visibility according to the low visibility determination result.

The invention relates to a 3D model rendering display method. The 3D model rendering display method comprises steps of determining whether a root node of each sub-block in an established 3D model is visible according to position information of a current viewpoint; partitioning the 3D model according to a three-dimensional coordinate direction into a plurality of sub-blocks, wherein each sub-block generates a corresponding adaptive tree LOD according to a hierarchy and data quantity information of each; according to the self-adaptive tree LOD, performing recursive traversal on a sub-tree from a visible root node and performing LOD visibility determination on all nodes under the root node; performing visibility determination and LOD accuracy test on all nodes under the root node layer by layer according to the hierarchy to obtain a corresponding hierarchy of a node which satisfies visibility and an LOD accuracy requirement; loading model data corresponding to the hierarchy satisfying the requirements; and rendering and displaying the 3D model. The invention also discloses a 3D model rendering display system, which solves defects of the LOD strategy in the prior art.

When a vehicle attempts to enter a priority road from a non-priority road, a visibility determination processing section compares moving object information on the priority road obtained from a first infrastructure facility installed near a stop position with moving object information on the priority road detected by an autonomous sensor mounted on the vehicle, and determines that the visibility is poor if the former does not match the latter or determines that the visibility is good if the former matches the latter. Then, when the former does not match the latter, the driver is informed of intersection support information. When the former matches the latter, the driver is not informed since it is determined that the driver has already recognized the information by visual observation.

The invention relates to an image defogging method, an image defogging device, a computer storage medium and a mobile terminal. The image defogging method comprises steps: a photographing preview mode is entered, and a preview image is displayed; the current visibility of the area of the preview image is acquired; according to the visibility, a haze concentration grade is determined; and according to the haze concentration grade, a corresponding defogging method is adopted to carry out defogging processing on the preview image. According to the above image defogging method, the haze concentration grade can be determined according to the acquired visibility, a corresponding defogging method is adopted for a preview image with a different haze concentration grade for adaptive defogging processing, the defogging effects are enhanced, and the user experience is provided.

An intersection visibility determination device includes an ECU that determines visibility at an intersection. When a host vehicle approaches an intersection with a stop sign, the ECU calculates conflict points at which a trajectory vector of the host vehicle intersects with virtual trajectory vectors of intersecting objects, which are presumed to come from the right side and the left side of the intersection, respectively. The conflict points are calculated based on information on types and traveling positions of the intersecting objects. The ECU sets visibility determination areas at the intersection as viewed from the host vehicle based on the positions of the conflict points, the right-side and the left-side visibility target distances, and the current location of the host vehicle, and calculates, based on the visibility determination areas, visibility distances that are used as visibility parameters indicating whether the visibility at the intersection is good or poor.

Embodiments of the invention relate to the field of traffic technology, and disclose a movement control method and device for a warning sign. The method comprises of: when detecting that a vehicle stops due to an accident, acquiring heading direction information of the vehicle and first lane line information of the lane where the vehicle is photographed by a camera; determining the curvature of the lane according to the first lane line information; determining the moving distance of the warning sign according to the type of the lane and the visibility of the current environment in which the vehicle is located; and controlling the warning sign to move to a specified position according to the heading direction information of the vehicle and the curvature. The distance between the specified position and the stop position of the vehicle is the moving distance. According to the embodiments of the invention, the warning sign can be automatically moved without the need of placing the warningsign by a driver or a passenger, thereby reducing the accidents that happen when drivers or passengers place the warning signs.

In order to estimate changes in ambient visibility, this visibility estimation device is provided with: an image recognition unit (1) that detects landmarks by analyzing images; an information storage unit that records, as past detection history, image analysis results for the landmarks detected by the image recognition unit (1), and the detection positions when the image recognition unit (1) detects the landmarks; and a visibility determination unit (3) that estimates a change in visibility on the basis of comparisons between past detection positions recorded in the information storage unit (2) and the detection positions when the image recognition unit (1) redetects landmarks corresponding to the detection history recorded in the information storage unit (2).

Seismic visibility analysis of selected subsurface structures is employed to determine surface locations offering high visibility of target events. These locations can then be used as a basis for acquiring additional seismic survey data and / or selecting existing traces for re-migration with more sophisticated migration methods. With either usage, the newly migrated data is expected to offer enhanced images of the target event. In some embodiments, the visibility determination includes using a wave equation based propagator to find, for each of multiple simulated shots, a reflection wavefield from the target event in a seismic model; and to calulate, for each of multiple receiver positions, a contribution signal from each reflection wavefield. The visibility determination further includes converting each contribution signal into a source-receiver visibility value. Because data acquisition and / or re-migration is limited to the selected region, the imaging effort for the target event is significantly reduced.

An endoscope system includes an image pickup section, provided in an endoscope, which performs image pickup, a determining section that determines whether a specific observation object exists inside an image pickup region of the image pickup section, a recognizing section that determines whether the specific observation object can be recognized as an image from the picked-up image in the image pickup region picked up by the image pickup section, a low visibility determination output section that determines, when the determining section determines that the specific observation object exists inside the image pickup region and the recognizing section cannot recognize the specific observation object as an image, that the image pickup section is in a low visibility condition and outputs a low visibility determination result, and an obstacle estimation section that estimates an obstacle or a type of obstacle which causes the low visibility according to the low visibility determination result.

The invention relates to a ship control device based on gas analysis. The ship control device comprises a scattered type visibility viewer, ship speed measuring equipment, ship driving equipment and main control equipment, wherein the main control equipment is connected with the scattered type visibility viewer, the ship speed measuring equipment and the ship driving equipment respectively; a maximum allowable driving speed of ships is determined according to the visibility output by the scattered type visibility viewer; based on the maximum allowable driving speed of the ships and a current ship driving speed output by the ship speed measuring equipment, the ship driving speed is controlled by the ship driving equipment. The ship control device based on the gas analysis can be used for automatically limiting the driving speed of the ships by checking the visibility of the air around the ships, and prompting a driver to open or close windows by comparing PM2.5 (Particulate Matter 2.5) concentrations of inside and outside control rooms of the ships, so that the safety driving of the ships and the personal safety of people on the ships are guaranteed.

The invention discloses a streetlamp brightness adjusting system based on road visibility. The streetlamp brightness adjusting system comprises an information acquisition module which is used for acquiring weather information of a target road section, a visibility determining module which is used for determining the visibility of the target road section according to the weather information of thetarget road section, and a brightness adjusting module which is used for adjusting the brightness of a streetlamp on the target road section to be matched with the visibility of the target road section according to the visibility of the target road section. In this way, through the brighter streetlamp and the better illumination effect, a freshman and a driver can aware the peripheral pedestrian and vehicle situation more clearly, the road jamming situation can be effectively reduced, and road accidents can be effectively avoided.

A driving assistance device includes a visibility determination unit that determines whether visual recognition within a predetermined distance from a vehicle can be achieved in a traveling direction of the vehicle, an operation detection unit that detects an operation of causing the vehicle to enter a space in which an oncoming vehicle travels, based on information representing an operation of the vehicle by a driver, and a control warning unit that warns the driver or controls the vehicle in such a way that the vehicle does not enter the space when the visibility determination unit determines that visual recognition within the predetermined distance cannot be achieved, and the operation detection unit detects the operation of causing the vehicle to enter the space.

The invention relates to a visibility determination method, a device, computer equipment and a storage medium. The method comprises the steps of performing region division on a target image accordingto a first preset size to obtain a first number of first images; according to a second preset size, longitudinally dividing the target image to obtain a second number of second images; clustering thetransmissivity of the first number of first images according to a preset clustering center to obtain a preset number of categories corresponding to the clustering center; for each second image, determining the proportion of the first image corresponding to each category in the second images to obtain a preset number of ratios corresponding to the second images; and inputting the preset number of ratios corresponding to each second image into a preset visibility recognition model to obtain the target visibility corresponding to the image. Therefore, the influence of the local image corresponding to the first image is reduced, the situation that the local area of the image interferes with the global situation is avoided, and the target visibility determined according to the preset number ofratios is more accurate.

Provided are a travel assistance device and a computer program which enable travel assistance which is appropriate for connection roads to be performed. More specifically, the present invention is configured such that a captured image of the surrounding environment of a vehicle is acquired, a map information image, i.e. a map image which expresses a map in three dimensions, and shows the same range as the image-capture range of the captured image from the same direction as the image-capture direction of the captured image, is acquired, the driver visibility of a connection road, i.e. a road which connects with the road along which the vehicle is travelling at a junction point present in the surroundings of the vehicle, is determined on the basis of the captured image and the map information image, and a visibility determination result is outputted.

The present invention provides a browser based mass three-dimensional point cloud data release method. The method comprises the following steps that S1. a bounding box of original three-dimensional point cloud data is calculated, and block division is carried out on the original three-dimensional point cloud data according to the bounding box and a regular grid division theory, so as to divide a plurality of block point cloud bounding boxes; S2. an octree is established for each block point cloud bounding box, and a description file is configured for each octree; S3. regular grid division is carried out on a point cloud octree, and a quadtree structure is established for the octree contained in each regular grid; and S4. a browser sends in real time a query request to a server, the server returns in real time an octree query result to the browser, the browser carries out visibility determination on the octree query result, and the visible octree is loaded, so as to complete dynamic loading and scheduling of mass three-dimensional point cloud data. According to the method disclosed by the present invention, web based release and visualization of mass large point cloud files are realized, and the problem that point cloud data is difficult to release is solved.

The invention relates to the technical field of highway traffic safety management, and specifically to a method for determining the dynamic speed limit value of a highway road section based on visibility meters. The method includes the steps of determining a speed limited road section of a highway, selecting the addresses of the visibility meters, arranging, installing and calibrating the visibility meters, returning real-time visibility data, and calculating the dynamic speed limit value. The visibility meters monitor visibility of a highway on a real-time basis, and a reasonable safety driving speed is determined according to the visibility as a speed limit value. In this way, occurrence of traffic accidents can be prevented, and driving safety can be improved.

The invention relates to a 3D model rendering display method. The 3D model rendering display method comprises steps of determining whether a root node of each sub-block in an established 3D model is visible according to position information of a current viewpoint; partitioning the 3D model according to a three-dimensional coordinate direction into a plurality of sub-blocks, wherein each sub-block generates a corresponding adaptive tree LOD according to a hierarchy and data quantity information of each; according to the self-adaptive tree LOD, performing recursive traversal on a sub-tree from a visible root node and performing LOD visibility determination on all nodes under the root node; performing visibility determination and LOD accuracy test on all nodes under the root node layer by layer according to the hierarchy to obtain a corresponding hierarchy of a node which satisfies visibility and an LOD accuracy requirement; loading model data corresponding to the hierarchy satisfying the requirements; and rendering and displaying the 3D model. The invention also discloses a 3D model rendering display system, which solves defects of the LOD strategy in the prior art.

The invention provides a millimeter wave radar modeling-based method for object visibility determination, to solve the problem of object visibility determination based on virtual sensor modeling in intelligent vehicle simulation and testing, and improve the fidelity of sensor modeling while meeting simulation efficiency requirements. It includes the steps of target vehicle information detection to obtain target vehicle information; target vehicle reflection intensity simulation: for each target vehicle performing geometry culling on the target vehicle, discarding completely-invisible target vehicles, and calculating visible section information for each target vehicle that has a visible section, and reflection intensity calculation; target vehicle visibility determination: analyzing visibility of the target vehicle according to the target vehicle reflection intensity, and converting and outputting information of a visible object into an expression form of a real millimeter-wave radar sensing an object.

The embodiment of the present invention discloses a three-dimensional map rendering display method, including: calling the model file corresponding to the current scene model according to the map position information of the current viewpoint; wherein the data in the model file is cached in the form of an octree structure; The tree structure is combined with the viewing frustum of the current viewpoint, and the preset visibility judgment algorithm is used to judge the visibility of the level of detail LoD of all nodes in the current scene model, so as to mark the viewing range of the viewing frustum entering the current viewpoint in the model file Visible nodes and sub-nodes within; according to the marked visible nodes and sub-nodes, render and display the scene within the view range of the viewing frustum entering the current viewpoint. The invention also discloses a three-dimensional map rendering and display system. By adopting the invention, rendering efficiency is improved, network traffic is reduced, and large-scale point cloud data is displayed to users through Web three-dimensional technology.

The invention discloses a vehicle window fogging prevention method and system, electronic equipment and a storage medium. The method comprises the steps of obtaining future fogging risk parameters; acquiring a corresponding future fogging risk level according to the future fogging risk parameter; and performing corresponding fogging prevention operation according to the future fogging risk level. According to the invention, the future fogging risk level is determined according to the current vehicle speed, the predicted fogging time and the vehicle window visibility, and the defects that in the prior art, the fogging risk level is defined coarsely, and the fogging trend is not considered are overcome. The invention is high in intelligent degree, the fogging trend (fogging parameter time sequence) and grade are quantified according to the fogging principle, prompt information is generated according to different future fogging risk grades for reminding, corresponding prevention measures are taken, and therefore driving accidents caused by fogging are prevented.

The invention provides a driving visibility determination method and device based on depth estimation. The driving visibility determination method based on depth estimation comprises the following steps: acquiring point cloud data of a vehicle of which the driving visibility is to be determined; determining a relative depth according to the point cloud data and a pre-established depth estimation model; and determining the driving visibility of the vehicle according to the relative depth and the actual depth map. According to the driving visibility determination method and device based on depthestimation, the driving visibility of the vehicle and the road section can be accurately predicted under the condition that normal driving of the vehicle is not influenced.

The invention discloses a visibility determination method and device for a rear silencer of a vehicle, and relates to the technical field of vehicles. The terminal can establish a view surface based on the extracted target contour line of the rear bumper of the vehicle and the observation reference point, and sends a reminding message after determining that the rear silencer in the three-dimensional model of the vehicle intersects with the view surface, so as to indicate that the rear silencer does not meet the visibility design requirement. The target contour line is extracted from the three-dimensional model of the vehicle, namely, the visibility of the rear silencer of the vehicle can be determined in the design stage of the vehicle, and the visibility of the rear silencer does not need to be determined after a sample vehicle is manufactured, so that the visibility determination efficiency of the rear silencer of the vehicle is effectively improved, and the visibility determination efficiency of the rear silencer of the vehicle is improved. And the visibility determination cost of the rear silencer can be reduced.