13 results about "Surface matching" patented technology

This invention discloses a jet polishing method and apparatus for complex curved surfaces, comprising the following steps: Step S1: acquiring processing parameter information; Step S2: performing simulated polishing on the workpiece according to the parameters set in Step S1, and selecting the optimal removal function based on the simulation results; Step S3: performing formal polishing on the workpiece according to the optimal removal function described in Step S2; when switching to polishing a processing surface with different curvatures, changing the polishing nozzle with a different outlet diameter; and matching a new optimal removal function; changing the nozzle with a different outlet diameter can adapt to the operating space of polishing areas of different sizes on complex curved surfaces, improving the overall polishing efficiency; at the same time, based on the relationship between the optimal removal function matched on the previous processing surface and the optimal removal function matched on the switched surface, controlling the polishing nozzle to move to a new starting point before starting polishing; eliminating the problem of seams between adjacent areas.

A computer-implemented medical method for surface matching registration of a patient (O) in image guided navigation comprises the steps of obtaining (81) registration data (Dr) of a surface of a patient (O), wherein the registration data (Dr) comprises a plurality of registered points (P), determining (S2), for each of the plurality of points (P) a matching weight (W) based on at least one quality criteria value (Q1, Q2, Q3), wherein the matching weight (W) reflects a quality of the respective point (P) and performing (S3) a matching algorithm between image data (Di) of at least part of the patient (O) and the registration data (Dr), using the matching weight (W) of each of the plurality of points (P), thereby determining a matching solution (Ms). Thus, for each point a quality can be determined that is considered in the matching algorithm. In other words, the matching weight (W) leads to a more accurate intraoperatively acquired point cloud and consequently to an improved matching accuracy.

The invention provides a segment detection method and system based on a two-dimensional slide rail and binocular structured light, and the method comprises five steps: the five steps automatically complete full-coverage scanning through the two-dimensional slide rail, improve the measurement efficiency, effectively solve the problem of weak texture surface matching in combination with a binocular light sensing unit and coding structured light, and improve the detection precision. Through automatic splicing of system calibration, accumulated errors are eliminated, a complete three-dimensional model is obtained, and objective and accurate three-dimensional data support is provided.

The invention discloses a landslide risk prediction method based on a landslide disaster assessment model, and belongs to the technical field of image processing. The method comprises the following steps: firstly, extracting a remote sensing image of a to-be-monitored area, obtaining a channel earth surface matching value and a channel soil matching value, and constructing R, G and B channel soil earth surface comparison maps; obtaining a plurality of adjacent moment comparison diagrams, obtaining soil surface characteristic values according to the change of the soil surface comparison value, and constructing a characteristic diagram; then constructing a cumulative landslide weight matrix according to the landslide weight coefficients of the suspected variable pixel points, and constructing a cumulative soil surface feature map according to the soil surface feature values; and finally, processing the accumulated landslide weight matrix and the accumulated soil surface feature map corresponding to the three channels by adopting a landslide disaster assessment model to obtain a landslide risk score. The accuracy of landslide risk prediction is improved.

The invention particularly discloses a complementary surface parallel matching method and system based on three-dimensional topology and a medium, and belongs to the technical field of precise surface matching. According to the method, a matched surface is fixed to a multi-axis adjusting mechanism, and three-dimensional shape data of the matched surface are collected by combining an optical scanning module and a double-laser displacement sensor; and constructing a topological map. And in the data processing platform, through feature point extraction and block height difference calculation, in combination with a concave-convex complementary relationship, a multi-axis adjusting mechanism is driven to carry out dynamic adjustment, and high-precision surface alignment under the condition of no preset mark is realized. The method has good adaptability to irregular concave-convex surfaces, the matching precision is smaller than or equal to 0.1 micrometer, the concave-convex area matching rate is larger than or equal to 95%, and the method is suitable for the technical field of high-precision assembly assembling.

The utility model relates to the technical field of telemetering cover plate detection tools, and discloses a telemetering cover plate bevel edge included angle detection device, which comprises a base, the upper end of which is provided with a supporting curved surface matched with the arc-shaped bottom surface of a telemetering cover plate; the bevel edge included angle detection assembly comprises a go gauge and a no-go gauge, and the detection bevel included angle of the go gauge is smaller than the detection bevel included angle of the no-go gauge; the screw hole detection assembly comprises four detection holes which are symmetrically formed in the base; according to the utility model, through collaborative design of the bevel edge included angle detection assembly and the supporting curved surface, efficient and accurate detection of the bevel edge included angle of the telemetering cover plate is realized, the assembly problem caused by angle out-of-tolerance in a traditional detection method is avoided, and the detection accuracy and the batch detection efficiency are significantly improved; according to the screw hole detection assembly, detection holes which are symmetrically distributed and a round rod are inserted, and integrated detection of the position precision of the counterbore is achieved through the aperture difference design and the axis common center characteristic.

The invention relates to the technical field of automobile manufacturing, in particular to an identification universality judgment method and device based on profile matching, electronic equipment and a storage medium, and the method comprises the steps: obtaining a solid three-dimensional model of an identification to be borrowed, and extracting an adhesive layer reference surface from the solid three-dimensional model; and on the basis of a preset space matching rule, carrying out pose alignment on the adhesive layer reference surface and the theoretical bonding surface of the target component in a three-dimensional space. According to the method, a traditional low-efficiency process which depends on artificial experience, real object trial assembly and repeated adjustment is converted into a standardized digital process which can be completed in a computer environment within a few minutes, so that the judgment efficiency and the automation level are remarkably improved, the objectivity and the accuracy of a judgment result are ensured, and the judgment efficiency is improved. Therefore, the repeated development cost and the subsequent quality risk of the mold caused by misjudgment are effectively avoided.

This invention provides a drone VR landscape construction system based on spatial computing, comprising: a digital twin reference construction module for constructing a digital twin as an absolute spatial reference; a drone edge SLAM module for generating a sparse point cloud containing three-dimensional coordinates; a point-to-surface alignment correction module for continuously aligning the sparse point cloud to the surface of the digital twin using a point-to-surface matching algorithm to eliminate cumulative drift during drone operation; a virtual reality interaction module for displaying the reconstructed landscape scene from a first-person perspective and capturing the operator's gaze hotspots in real time; a dynamic re-collection feedback module for converting gaze hotspots into regions of interest and generating re-collection tasks to drive the drone to dynamically re-collect and verify the regions of interest; and an output module for generating a spatially computed, drift-free, and quality-labeled 3D VR landscape model. This invention aims to achieve drift-free, real-time human-machine collaborative high-fidelity VR landscape construction.

The application discloses a game resource production method and device, a storage medium and a terminal, relates to the technical field of data processing, and mainly aims to solve the problem that the rain and snow game resource produced by direct covering cannot achieve the display effect of real rain and snow covering and the accuracy of simulating a real scene in game resource production is reduced. The method comprises the following steps: creating a local area surface matching at least one preset inclination angle and / or horizontal angle of a first target element; generating a second target element on the local area surface; and baking the second target element to the first target element according to the normal direction of the local area surface, so as to obtain a game resource. The method is mainly used for game resource production.

Methods and systems for determining a corrective stage in orthodontic treatment. Methods may include presenting a menu for a user to enter a pre-determined tolerance or a maximum number of iterations for performing a surface matching algorithm. Methods may include matching one or more teeth of a previously segmented teeth model to one or more corresponding teeth of a current teeth image. The matching may include executing the surface matching algorithm. The methods may include iteratively finding closes sample points, determining whether distances between closest sample points exceed a predetermined tolerance, and adjusting the distances. A current teeth model may be generated based on the adjusted previously segmented teeth model. A current teeth model using the corrective stage may be generated.

The application discloses a multi-target tracking method based on point-face matching association, comprising the following steps: acquiring a video to be detected and performing serialization, constructing a detector according to a feature extraction network, sequentially performing target detection on video frames in the video frame sequence according to the detector, obtaining a tth video frame and a t+1th video frame from the video frame sequence, dividing targets in the t+1th video frame into high-confidence targets and low-confidence targets, performing first association matching on the high-confidence targets according to a target frame similarity perception algorithm, adding matched targets into target tracks of the tth video frame, initializing target tracks of the targets which fail to match, respectively, performing second association matching on the low-confidence targets, adding matched targets into target tracks of the tth video frame, discarding the targets which fail to match, and sequentially traversing all the video frames until all the target tracks are obtained. The detection confidence of the occluded target is improved, and the accuracy of multi-target track association is improved.

The invention discloses an aircraft surface structure deformation analysis method, device and equipment and a storage medium. Comprising the following steps: acquiring a to-be-optimized structural geometric model on the surface of an aircraft, and performing initial state deformation analysis on the structural geometric model to obtain deformation data; a deformation control point and a boundary contour are extracted from the deformation data, and a new curved surface is generated based on the deformation control point and the boundary contour; and establishing a new geometric model based on the new curved surface, performing deformation analysis on the new geometric model, and when an analysis result meets a preset part deformation requirement, outputting a final geometric model. Through deformation analysis, flight pressurization load can be simulated to obtain real deformation data, and the situation that the optimization direction deviates from actual deformation is avoided. By extracting deformation control points and boundary contours, new curved surface matching structure deformation features are ensured. Deformation analysis can ensure that the model meets aerodynamic performance requirements, flight resistance increase caused by deformation is avoided, and a structural basis is provided for energy conservation, emission reduction and cost reduction of airplanes.

The application discloses a BIM model-based arrangement surface matching method and device, equipment and a storage medium, and the method comprises the following steps: obtaining a component to be matched in a BIM model and screening an arrangement surface needing to be matched from an exposed surface of the component to be matched; determining an adjacent component spatially intersecting with the component to be matched and an initial shell object of the component to be matched; generating a three-dimensional entity template of the component to be matched according to a geometric type of the arrangement surface, the adjacent component and the initial shell object; and performing instantiation processing on the three-dimensional entity templates of all the components to be matched to generate a matching template of the BIM model. The problems of small broken templates and huge calculation amount of the BIM model in the matching process are solved.