10 results about "Planar model" patented technology

The invention discloses an indoor scene three-dimensional reconstruction method based on deep fusion and confidence modeling, and belongs to the technical field of computer vision. According to the method, composite data frames such as a color image, a depth map, an IMU (Inertial Measurement Unit) and a camera attitude are comprehensively utilized to carry out regional three-dimensional reconstruction on an indoor scene: firstly, the scene is divided into a smooth region (such as a wall, a ground, a ceiling, a glass plane, a mirror surface, a blackboard and other planes) and a complex curved surface region; aiming at the smooth area, adopting geometric prior guide plane fitting provided by a visual large model, and combining sensor attitude information to quickly reconstruct a regular plane model; for a complex curved surface area, a multi-frame point cloud fusion strategy is adopted to accumulate different view angle information, and a deep residual error refining network is utilized to recover curved surface details, so that a high-precision curved surface model is obtained. According to the method, the three-dimensional structure of the indoor scene can be efficiently reconstructed, the global framework of the smooth area is reserved, and the details of the surface of a complex object are depicted in detail.

This invention discloses a method for verifying the drag performance of a penguin-shaped biomimetic AUV, comprising the following steps: establishing a computational domain for the penguin-shaped biomimetic AUV; meshing the computational domain of the penguin-shaped biomimetic AUV; setting boundary and physical conditions for the computational domain of the penguin-shaped biomimetic AUV; setting the outflow surface of the computational domain of the penguin-shaped biomimetic AUV as a pressure outlet, and the inflow surface, upper, lower, and side surfaces as velocity inlets, setting the mid-longitudinal section as a symmetry plane, and setting the AUV model surface as a wall surface; calculating the viscous drag of the penguin-shaped biomimetic AUV when it navigates in still water, and using the computational fluid dynamics software STAR-CCM+ to predict the drag at three modeling stages for three types of AUV models.

The invention discloses a rendering method and device, a storage medium, equipment and a program product, and the method comprises the steps: firstly extracting transparent channel data of a source special effect, and generating at least one static texture containing the transparent channel data; then a planar model is obtained, texture coordinates of the planar model are annular texture coordinates, and the left side and the right side of the texture can be closed and connected in a three-dimensional space when the planar model carries out texture sampling; providing a dynamic rendering texture according to at least one static texture containing the transparent channel data generated by extracting the transparent channel data of the special effect; performing material rendering on the planar model by using the dynamic rendering texture; finally, the texture coordinates of the plane model are driven to roll in the annular direction so that the source special effect can be played on the plane model in a loop mode, and the annular direction is determined based on the annular texture coordinates. According to the rendering method provided by the invention, seamless circulation of the special effect can be automatically realized, and the original detail effect of the source special effect is reserved.

In the design of various structures, this system enables the automatic generation of flags that reflect the attribute information of the structure included in the 3D model. [Solution] The automatic calculation device 1 includes a 3D model acquisition unit 10a that acquires a 3D terrain model and a 3D plan model representing the current terrain and plan, and a 3D structure model representing the structure; an attribute information acquisition unit 10b that acquires attribute information of the structure included in the 3D structure model and attribute information of the structure input from the user; an automatic drawing unit 10c that automatically draws flags based on the attribute information acquired by the attribute information acquisition unit 10b; and a display unit 11 that displays the flags drawn by the automatic drawing unit 10c together with the shape of the structure model.

This invention discloses a slope surface displacement inspection and monitoring system and method based on grouped planar target points and robust fusion of multiple images. The system includes: a target point layout module, a planar coordinate modeling module, an image acquisition and processing module, a target point identification module, a homography solution module, a matrix optimization module, a displacement inversion module, a fusion module, an early warning module, and a data management module. This invention uses uniquely coded target points, which significantly improves the reliability of automatic identification and cross-time-series matching of slope monitoring points. By grouping slope target points according to local coplanar features, this invention avoids errors caused by establishing a unified planar model for complex slopes as a whole, thus improving the accuracy of geometric modeling.

The invention relates to a site parametric modeling method and device, computer equipment, a readable storage medium and a program product. The method comprises the following steps: acquiring site modeling parameters corresponding to an initial plane model of a target site, wherein the site modeling parameters are determined according to the form of the initial plane model; generating a form change curve of the initial plane model based on the site modeling parameters and a preset curve generation tool; segmenting the initial plane model based on the morphological change curve to obtain a plurality of sub-site models; and performing grouping processing on the sub-site models through a preset grouping strategy to obtain a target site modeling model corresponding to the target site. By adopting the method, the field modeling efficiency can be improved.

This invention provides a method, apparatus, device, and storage medium for determining the offset of brush angles. The method determines the position of the geometric center line of the commutator and the position of the brush center line in a planar model of a single-phase series motor. The geometric center line is offset from the brush center line by a predetermined angle along the direction of armature rotation of the single-phase series motor. This causes the commutating element of the single-phase series motor to generate a commutating electromotive force (EMF) when cutting the main pole magnetic field. The commutating EMF is opposite in direction to the reactive EMF and rotational EMF generated by the commutating element cutting the armature magnetic field, and they cancel each other out. This solves the problem of potential sparking between the commutator and the motor brushes when the motor commutation is poor.

The invention provides a warehouse-in and warehouse-out assembly line type settlement and access control linkage method and system for an intelligent warehouse, and relates to the technical field of intelligent warehousing, and the method comprises the steps: receiving a warehouse-out operation request for target goods, generating a corresponding to-be-executed warehouse-out task, and according to the to-be-executed warehouse-out task, executing the warehouse-out operation request; analyzing and acquiring a specific storage location identifier occupied by the target cargo in the warehouse storage plane model, retrieving coordinates of an original closed polygon boundary vertex sequence uniquely corresponding to the storage location identifier or describing a plane contour of the storage location identifier, and performing adaptive compression on the original vertex sequence by applying a polygon simplification algorithm, and generating a simplified polygon boundary vertex sequence coordinate. Through a series of automatic, digital and linkage technical means, the problems of risk release without settlement, low efficiency and the like are solved, and finally the safe, efficient and accurate intelligent management and control effect is achieved.

This invention discloses a method and system for path planning in 3D surface printing. The method includes: surface scanning, using a 3D laser scanner to scan the target surface; point cloud data preprocessing, preprocessing and optimizing the original point cloud data; model design, designing the model of the product to be printed and exporting it as point cloud data as the base point cloud data for registration; surface mapping, registering the base point cloud data of the model to be printed with the target point cloud data of the scanned surface model, mapping the planar model onto the surface; Z-axis coordinate change calculation, calculating the change of the Z-axis coordinate with the surface height during printing on the surface; and path planning, performing path planning processing on the point cloud data obtained after surface mapping, sorting the coordinates according to priority based on the required path to obtain the coordinates of each point on the complete printing path. This invention can improve the accuracy and detail of 3D printing.

The invention is suitable for the technical field of aerospace machinery processing, and provides a preparation method of a high-pressure-bearing aerospace engine thin-wall cylinder, which mainly comprises the steps of modeling and forming mold production, decomposition of a digital model into a plane model drawing, surface plate material treatment, plate material welding and splicing, blank material treatment, heat treatment and compression molding, and electron beam welding forming. The method comprises the following steps: modeling a cylinder of a water-cooling double-layer structure, decomposing the cylinder into a plane model drawing through a digital model, selecting straight plate materials, carrying out plane milling and flow channel processing, fully fitting and welding the two plate materials through vacuum diffusion welding, and carrying out heat treatment to form a semicircular cylinder. The two semicircular barrels are welded through vacuum variable-focus electron beam welding, so that rotary body welding is changed into plane welding, the purpose of welding multiple pieces at a time can be achieved, the rate of finished products can be increased, a modular machining production mode is adopted, the production period can be effectively shortened, the production cost is reduced, and the production efficiency is improved. And the overall production efficiency is improved.