55 results about "Deformation vector" patented technology

The invention discloses an airspace engine 3D printing deformation compensation method. The method comprises the following steps that S1, a three-dimensional CAD model is constructed, and a printing layer set is generated; s2, obtaining residual stress tensor fields of the current printing layer and the historical printing layer; s3, constructing a stress shadow mapping tensor; s4, inputting the stress shadow mapping tensor and the current printing layer parameter into the reverse stress propagation neural network model, and outputting a deformation prediction vector field; s5, performing geometric compensation processing on the geometric area of the printing layer according to the deformation prediction vector field; s6, generating a printing code according to the compensated geometric model; and S7, carrying out error comparison on the actual deformation vector field and the overall prediction deformation vector field, if the error is greater than a preset tolerance threshold value, feeding back error information to the step S5, and repeatedly executing the steps S5 to S7 until the error vector field does not exceed the tolerance threshold value. According to the method, residual stress modeling and the reverse stress propagation neural network are fused, and 3D printing deformation compensation of the airspace engine is achieved.

The invention relates to the technical field of image data processing and intelligent control, and discloses a patch board spot welding track intelligent control method and system based on visual perception. According to the method, synchronous image streams are collected through a binocular vision sensor, and epipolar correction image pairs are generated through timestamp synchronization, ROI extraction and epipolar correction processing; calculating a disparity map by adopting a stereo matching algorithm, and constructing a compensated three-dimensional point cloud model based on deformation vector field fusion multi-frame point cloud data of a radial basis kernel function; welding spot position error vectors are generated by extracting welding spot feature points and performing spatial filtering optimization; and carrying out inverse kinematics calculation on the mechanical arm by adopting a damping least square method, carrying out safety constraint optimization in combination with prospective collision risk assessment and real-time pose data, and generating a trajectory compensation instruction. According to the method, the problems of dynamic deformation compensation and motion safety in patch plate welding are solved, the submillimeter welding spot positioning precision is achieved, and the welding quality stability and the system robustness are improved.

Disclosed in the present invention is a building structure safety visualization monitoring method, comprising: establishing a finite element model of a monitoring object; respectively setting a forced displacement of magnitude 1 at monitoring points of the finite element model, and calculating a structural deformation of the monitoring point under the action of forced displacement; calculating an initial structural deformation of the monitoring object under the action of dead load, and integrating deformation index data of nodes into a structural initial deformation vector; installing displacement sensors on the monitoring object, carrying out structural deformation monitoring on the monitoring points, obtaining monitoring data, and integrating the monitoring data into a monitoring data column vector; calculating a modal coefficient vector of the current monitoring data; calculating an additional deformation response column vector of the monitoring object under the monitoring data; calculating the total structural deformation of the monitoring object; and mapping the data in a building information model diagram for three-dimensional visualization display. According to the present invention, the overall total structural deformation and safety levels of a building structure can be calculated and undergo three-dimensional visual display, and readability is good.

The invention relates to the technical field of computer vision and image processing, and discloses a bar code detection method and system based on a deep neural network, and the method comprises the steps: extracting bar code features of different scales from an input image through a multi-scale feature extraction network, feature representation is enhanced through a space attention algorithm; self-adaptively capturing irregular bar code features by using a deformable convolutional network; a fine deformation vector field is generated through a multi-scale local deformation field estimation network; introducing physical constraints based on material elastic characteristics to regularize the predicted deformation field; based on the optimized deformation field, performing resampling and correction on the image through an accurate deformation correction sampler; according to the detection method, deformation of the non-rigid surface bar code can be accurately captured and corrected, and the accuracy and robustness of bar code detection in a complex environment are improved.

The invention discloses a soft package leakproofness detection method and system based on image recognition, and relates to the related field of soft package leakproofness detection.The method comprises the steps that a to-be-detected soft package is placed in a vacuumizing cavity, first-stage infrared irradiation is executed under the first pressure condition, and initial image data are collected; performing negative pressure treatment on the vacuumized cavity to a set pressure threshold value, executing second-stage infrared irradiation under a second pressure condition, and collecting deformation image data; performing registration alignment on the initial image data and the deformed image data, extracting image feature difference data, and calculating a deformation vector of the sealed area according to the image feature difference data; and constructing a soft package surface deformation distribution diagram according to the deformation vector to perform sealing judgment, and determining a package leakage detection result. The technical problem of low efficiency and accuracy of the existing soft package sealing performance detection is solved, and the technical effect of improving the sealing performance detection efficiency and accuracy is achieved.

The present invention relates to the technical field of tunnel deformation monitoring. Specifically, it is a tunnel deformation support control safety monitoring and early warning system, including: a data acquisition module, a deformation classification module, a support identification module, a cross-section generation module, and a safety matching module; by identifying the stress field and support joint points of the target tunnel according to the opposite direction and relative deviation of the target tunnel, obtaining the displacement and support deformation amounts of each support joint point under the opposite direction and relative deviation; and identifying the deformation types of each support joint point, dividing the relative deformation regions of each support joint point in the internal downward direction; predicting the change trend of the displacement and support deformation amounts of the current support structure under the relative deformation region; at the same time, generating multiple force-bearing cross-sections according to the change trend, and setting a vector analysis coefficient according to the displacement vector and deformation vector on the force-bearing cross-section; performing a safety matching calculation on the force-disturbed position according to the vector analysis coefficient; improving the safety of tunnel construction and operation.

The invention relates to a deformation monitoring method of a wind generating set blade in a running state, which comprises the following steps of: arranging a fiber grating sensor array in the blade, and collecting multi-section strain data; the strain is converted into curvature and torsion rate through a sensitivity matrix, and deflection and torsion angle are obtained through integral calculation; a laser range finder is installed in a cabin, and a space contour point cloud at the moment of blade scanning is obtained; absolute displacements of a plurality of reference sections are extracted from the point cloud, and full-field correction is carried out on the integration result of the fiber bragg grating through piecewise linear interpolation; outputting a three-dimensional deformation vector of the blade in a world coordinate system in combination with SCADA operation parameters; the deformation monitoring method of the wind generating set blade in the running state can achieve full blade coverage, accurately capture the deformation direction and deeply integrate with other running data, and has become urgent demands for industry development.

The invention relates to an optimization method for coupling of an artificial limb and a residual limb based on digital twinning. Carrying out multi-modal data fusion on anatomical structure characteristics, functional attributes and stress distribution data of the skin, the soft tissue and the bone of the stump; building multi-layer digital stump relation modeling; defining a multi-scale contact space formed by a structure adaptation area, a force transmission area and an energy buffer area in the dynamic behavior of the residual limb and the artificial limb; simulating a shear force migration track, a stress concentration mode and soft tissue slippage response among micro-units of a coupling surface in dynamic interaction; constructing a physical partition relationship of the coordination domain, and assisting in optimizing an artificial limb interface structure and a material functional gradient; describing a minimally invasive area caused by wearing and using the artificial limb, and calculating a minimum tissue perturbation path; through deformation vector field analysis and thermal-mechanical coupling relation modeling, risk distribution of tissue fatigue induced by the prosthetic interface under long-time use is evaluated; and dynamic multi-scale coupling optimization and multi-objective optimization control are carried out to realize visual prediction and early warning of fatigue risks.

The application discloses a multi-model integrated small sample credit score offset adaptive correction system and relates to the technical field of data processing. The system comprises a divergence quantization routing decision module, which acquires target small samples and source domain samples, calculates the JS divergence of each feature dimension, and generates a decoupling mask vector to separate the original feature space into anchor features and drift features; a controlled alignment dynamic demarcation module, which performs an antagonistic feature alignment on the drift features, extracts a deformation vector, and dynamically demarcates the boundary of a decision fuzzy area based on the module length; a partial derivative projection directional correction module, which intercepts samples according to the relative position of the fluctuation boundary and the fuzzy area boundary predicted by a multi-base model, and implements nonlinear directional correction on the intercepted samples based on the dot product of the deformation vector and the partial derivative gradient; and a noise reduction verification closed-loop evaluation module, which generates a final credit score and outputs a verification index of the correction effect. The application realizes adaptive offset correction of credit scores in a small sample scenario and improves the scoring accuracy.

The present application relates to a kind of shield tunnel irregular load inversion method based on neural network agent model, belong to shield tunnel load inversion field.The method, discard the assumption of load distribution mode in traditional lining load inversion method, inversion result can reveal the irregular load distribution mode of on-site tunnel, provide technical support for the service safety of tunnel service;Inversion is based on the deformation of lining whole circumference obtained by three-dimensional laser scanning technology, significantly increase the amount of field data, with the increase of n, the dimension of deformation vector can be increased sufficiently, avoid the defect that traditional inversion method easily leads to the non-uniqueness of inversion result.

The invention discloses a multi-model integrated small sample credit score offset self-adaptive correction system, and relates to the technical field of data processing, and the system comprises a divergence quantization routing decision module which obtains a target small sample and a source domain sample, calculates the JS divergence of each feature dimension and generates a decoupling mask vector; separating the original feature space into anchoring features and drift features; the controlled alignment dynamic demarcation module performs adversarial feature alignment on the drift features, extracts a deformation vector and dynamically demarcates a decision fuzzy region boundary based on the modulus length of the deformation vector; the partial derivative projection directional correction module performs sample interception according to the relative position of the fluctuation boundary and the fuzzy region boundary predicted by the multi-base model, and performs nonlinear directional correction on the intercepted sample based on the dot product of the deformation vector and the partial derivative gradient; the noise reduction verification closed-loop evaluation module generates a final credit score and outputs a verification index of a correction effect; according to the invention, the self-adaptive offset correction of the credit score in a small sample scene is realized, and the score accuracy is improved.

The application relates to a shaft structure deformation identification method and device, equipment, a storage medium and a program product, and relates to the technical field of tunnel construction monitoring. The application can effectively detect shaft deformation. The method comprises the following steps: at multiple detection time points, positioning data generated by a UWB base station when moving and ranging data between UWB tags when moving each time are acquired; the multiple UWB tags are positioned by a least square method according to the positioning data and the ranging data, and positioning coordinates of potential deformation positions at the multiple detection time points are obtained; for any potential deformation position, a deformation vector is constructed based on the positioning coordinates of any adjacent detection time points, and a time sequence of the deformation vectors of the multiple potential deformation positions is obtained; deformation risk judgment is performed on the multiple potential deformation positions based on the time sequence of the deformation vectors, and when there is deformation risk at any potential deformation position, deformation feature recognition is performed based on a two-dimensional image and three-dimensional point cloud data of a target deformation position with the deformation risk.

A medical use image processing method executed by a medical use image processing device including a processor, the method includes a reception step of receiving input of a first medical use image actually captured in a first posture, an image generation step of generating a second medical use image, in which the same portion as the first medical use image is imaged in a second posture different from the first posture, from the first medical use image in a pseudo manner, in which the second medical use image is generated by using a deformation vector field that converts the first medical use image into the second medical use image, and a modality conversion step of converting the second medical use image generated in the pseudo manner into a third medical use image having a modality different from the second medical use image in the pseudo manner.

The method and device for constructing a retinal atlas, computer device, and storage medium proposed in the embodiments of the present application obtain initial retinal images of different subjects, perform hierarchical processing on the initial retinal images to obtain an overall thickness image and multiple hierarchical thickness images, perform image registration on the overall thickness image to obtain a deformation vector field, perform image transformation on the hierarchical thickness images according to the deformation vector field to obtain target retinal images, combine the target retinal images corresponding to different subjects to obtain a retinal thickness image tensor, decompose the retinal thickness image tensor to obtain eigenvectors corresponding to each pixel point in the target retinal image, perform clustering on all pixel points in the target retinal image based on the eigenvectors to obtain a clustering result, and mark the pixel points corresponding to the target retinal image in the hierarchical thickness images according to the clustering result to obtain a target retinal atlas, which can improve the accuracy of retinal partitioning.

Provided are a shape model setting circuitry for setting a shape model of a target structure, a crack candidate plane in the shape model, and an observation plane of the shape model, an estimation model generator for generating an estimation model obtained from a numerical analysis of a structural analysis model by sequentially changing a boundary condition of the crack candidate plane in the structural analysis model generated from the shape model, and a crack state analyzer for estimating a position and a size of the crack by obtaining a distribution of load and displacement in the crack candidate plane at the same time by probabilistic inference through the application of an observation plane deformation vector indicating deformation of the observation plane obtained from measurement values, the estimation model, and a latent variable indicating presence or absence of the crack in the crack candidate plane.

The invention discloses a multi-process thermal mechanical deformation monitoring and compensating system for an engine support, and relates to the technical field of image monitoring. The system firstly collects visible light and infrared data to generate a fusion image, and recognizes the chip shielding state of the surface of a workpiece; if yes, driving a physical cleaning device to perform directional cleaning until a judgment logic is met, and generating a hot historical log containing cleaning process data; calculating a current three-dimensional full-field deformation vector of the workpiece in combination with the recovered pure surface temperature field and a thermal history log; and finally extracting the displacement and rotation amount of the key feature points, and generating a machine tool coordinate system space transformation instruction for compensation. According to the method, the problems of infrared temperature measurement distortion caused by inner cavity chip accumulation under the minimal quantity lubrication working condition and thermal lag prediction deviation generated by internal heat accumulation after chip removal are solved.

The application discloses a soft package sealing property detection method and system based on image recognition, relates to the field of soft package sealing property detection, and comprises the following steps: placing a soft package to be detected into a vacuum cavity, performing first-stage infrared irradiation under a first pressure condition, and collecting initial image data; performing negative pressure treatment on the vacuum cavity until a set pressure threshold is reached, performing second-stage infrared irradiation under a second pressure condition, and collecting deformation image data; aligning the initial image data and the deformation image data, extracting image feature difference data, and calculating a deformation vector of a sealing area according to the image feature difference data; constructing a soft package surface deformation distribution map according to the deformation vector to perform sealing determination, and determining a leaky package detection result. The application solves the technical problems of low efficiency and accuracy of existing soft package sealing property detection, and achieves the technical effect of improving sealing property detection efficiency and accuracy.

This invention discloses a method and system for analyzing and outputting TCM acupuncture cases based on machine learning, belonging to the field of medical image processing technology. The method acquires facial image sequences from two pathological cycles of the subject, extracts spatiotemporal feature maps, and obtains local receptive field feature matrix pairs through sliding windowing. It calculates the cross-cycle joint entropy gradient and its matrix, and generates a two-dimensional deformation vector using optical flow. Using the coordinates of the first cycle as a reference, the deformation vector is set to zero when the joint entropy gradient does not exceed the rigidity threshold; otherwise, the joint entropy gradient matrix is ​​used as a weight matrix through a sigmoid activation function, and a Hadamard product is performed with the deformation vector to obtain a denoised deformation vector. The denoised vectors are superimposed to obtain corrected pixel coordinates, which are mapped to the target localization coordinate matrix, and the acupuncture case analysis results are output. This scheme achieves precise spatial decoupling of local tissue evolution, eliminates the contamination of rigid regions by global deformation, and significantly improves the robustness and accuracy of cross-cycle acupuncture target localization.

The present application provides a kind of respiratory motion compensation method based on manifold clustering and weighted sparse, comprising the following steps: collecting the 4D-CT image of population data set and the 3D-CT image of individual subject expiration-inhalation two phases;Obtain the deformation vector field motion characteristics of population data set and individual subject by image registration;Obtain the sub-population data set similar to individual subject motion characteristics based on manifold clustering;The quantitative relationship between individual and sub-population motion characteristics is established by using weighted sparse method, and individual 4D-CT image is constructed;Obtain the internal deformation vector field and external skin surface motion of individual subject, and construct individualized respiratory motion compensation model to realize real-time prediction of lung image.The present application can reduce the radiation damage of the subject while ensuring accurate prediction of lung movement, and is expected to break through the limitations of existing respiratory motion compensation methods, can real-time image prediction for whole lung, reduce the influence of respiratory motion on lung tissue.

This invention relates to the field of intelligent compensation technology, specifically to an online compensation method for wear of belt pulley machining tools that integrates AI visual detection. The method includes the following steps: acquiring tool wear images and cutting force data, inputting them into a convolutional neural network to analyze the wear degree; detecting node stress ratios to group and form a stress heterogeneous mapping; monitoring displacement and stress angles to identify and optimize the trajectory of inverted nodes; decoupling deformation vectors to calculate correlation coefficients and classify to obtain a set of deformation compensation parameters for belt pulley machining tools; and calculating compensation prediction weighted summaries to generate online compensation commands for belt pulley machining tools. In this invention, visual recognition and multi-dimensional stress analysis are integrated to achieve tool wear assessment; stress distribution mapping presents stress-displacement correlation; dynamic trajectory optimization balances force; deformation is adaptively adjusted; nonlinear deformation and overall trend are synchronously corrected; compensation parameters are self-generated; deformation trajectory and machining path are coordinated; errors are dynamically suppressed; dimensional offsets and surface fluctuations are mitigated; and machining stability and response time are improved.

The application relates to the technical field of dynamic modeling, and discloses a dynamic modeling method and system for a 3D home scene, which comprises the following steps: acquiring real-time interactive displacement vector data; when the capture frequency of the real-time interactive displacement vector data exceeds a fixed refresh rate threshold, fusing into a weighted mixed deformation vector through a cyclic temporary storage queue; calculating a local vertex attribute matrix correction value according to the weighted mixed deformation vector, and performing matrix internal superposition transformation on the local vertex attribute matrix correction value and a time sequence topological offset matrix to complete time sequence difference compensation correction; and transmitting the local vertex attribute matrix correction value into a sub-buffer area overwrite interface through a sparse vertex array slice stored in an interleaved structure to perform local in-situ overwrite writing, and updating a grid topological form, wherein the application limits the recalculation cost within a local slice range, reduces the throughput pressure of a display memory bus, eliminates time sequence lag, and avoids picture flickering.

A method and system for reconstructing motion compensated nuclear images of an object and an arrangement for acquiring nuclear images and a computer program for performing the method are provided. The reconstruction method comprises receiving nuclear image data for a plurality of motion states, reconstructing the data into images for each motion state and computing a deformation vector field for each state for mapping the images onto a reference motion state. Computing the deformation vector field comprises providing an initial vector field, defining at least one rigid region of the object, incorporating the rigid region into the initial deformation vector field and computing the deformation vector field with the incorporated rigid region. The method further comprises mapping the reconstructed images of each motion state onto the reference state using the deformation vector field and combining the mapped nuclear images into a motion compensated nuclear image.

A medical use image processing method according to an aspect of the present invention is a medical use image processing method executed by a medical use image processing device including a processor, the medical use image processing method including causing the processor to execute a reception step of receiving input of a first medical use image actually captured in a first posture, and an image generation step of generating a second medical use image, in which the same portion as the first medical use image is imaged in a second posture different from the first posture, from the first medical use image in a pseudo manner, in which the second medical use image is generated by using a deformation vector field that converts the first medical use image into the second medical use image.

The invention relates to the technical field of image segmentation, in particular to a lung tumor CT image automatic segmentation method based on deep learning. The method comprises the following steps: firstly, acquiring three-dimensional CT images of different breathing time phases and a tumor area in the first image; then acquiring a rigid transformation model of lung movement; marking points are determined in a preset range of the tumor area, marking points in each non-first image and deformation vectors of the marking points are determined, stable marking points are screened out, deformation vectors of the unstable marking points are corrected, and then each three-dimensional CT image and correction positions of the marking points in the three-dimensional CT image are input into a trained segmentation model to obtain a segmentation model; and obtaining a lung tumor segmentation result. According to the method, the respiratory movement of the lung tissue is decomposed and analyzed, the movement changes of the mark points in the tumor area in different respiratory time phases are accurately evaluated, then automatic segmentation is carried out based on the segmentation model of deep learning, and the lung tumor CT image segmentation effect based on deep learning is improved.

The invention comprises: a shape model setting unit (21) for setting a shape model of an object structure (7) to which an external force is applied, a crack candidate surface (7fc) of a crack expected to be hidden in the shape model, and an observation surface (7fo) of the shape model; an inference model generating unit (22) for sequentially changing the boundary conditions of the crack candidate surface (7fc) in a structural analysis model produced based on the shape model, and generating an inference model obtained by numerically analyzing the structural analysis model; and a crack state analyzing unit (3) for applying an observation surface deformation vector representing the deformation of the observation surface (7fo) obtained by the actual measurement value of the observation surface (7fo), an inference model, and a potential variable representing whether there is a crack (9) in the crack candidate surface (7fc), and simultaneously obtaining the distribution of the load and displacement in the crack candidate surface (7fc) through probabilistic inference, thereby inferring the position and size of the crack (9).

This disclosure relates to the field of computer graphics technology, and provides a method, apparatus, device, medium, and program product for clothing adaptation of virtual characters. The method for clothing adaptation of virtual characters includes: first, establishing a three-dimensional spatial mesh containing a source virtual character model and a target virtual character model with the same topological structure, as well as a source clothing model; then, based on the positional correspondence between the source and target virtual character models, and combined with smoothing constraints to limit the difference in deformation vectors between adjacent mesh points, calculating the deformation vector of each mesh point in the three-dimensional spatial mesh; finally, using the deformation vector of each mesh point, mapping and transforming the source position of each vertex in the source clothing model to the target position, thereby generating a target clothing model adapted to the target virtual character model. This disclosure can effectively maintain the geometric characteristics of the clothing model, reduce distortion during the adaptation process, and improve visual effects.

The present invention discloses a method for compensating for deformation in 3D printing of aerospace engines, comprising the following steps: S1, constructing a three-dimensional CAD model and generating a set of printed layers; S2, obtaining the residual stress tensor field of the current printed layer and the historical printed layers; S3, constructing a stress shadow mapping tensor; S4, inputting the stress shadow mapping tensor and the current printed layer parameters into an inverse stress propagation neural network model, and outputting a deformation prediction vector field; S5, performing geometric compensation processing on the geometric area of ​​the printed layer based on the deformation prediction vector field; S6, generating a printing code based on the compensated geometric model; S7, comparing the actual deformation vector field with the overall predicted deformation vector field; if the error is greater than a preset tolerance threshold, feeding the error information back to step S5, and repeating steps S5 to S7 until the error vector field does not exceed the tolerance threshold. The present invention integrates residual stress modeling and inverse stress propagation neural network to achieve deformation compensation in 3D printing of aerospace engines.

A medical image editor device comprises a display and an electronic calculator which are connected with each other, and at least one medical image is displayed in the display; the electronic calculator can be executed by the medical image editor. The medical image editor comprises a deformation tool, the deformation tool is used for correcting a marking line in a medical image and comprises at least one deformation pattern and a deformation vector pattern, and the deformation vector pattern and the deformation pattern are mutually combined to form a pattern of the deformation tool; wherein the deformation tool enables the marking line to generate deformation with a certain proportion in the direction indicated by the deformation vector pattern according to the deformation pattern. In addition, the medical image editor further comprises a scaling tool.

The invention discloses a power transmission line tower deformation intelligent monitoring method and system based on visual identification, and relates to the technical field of power transmission line state monitoring, and the method comprises the steps: collecting historical normal observation frames, constructing a historical main track and a flow frame, defining a deformation vector, and constructing a historical mode matrix; establishing an optimized objective function based on a historical pattern matrix and a deformation representation vector, solving by using ADMM to obtain a sparse coefficient vector, calculating a reconstruction error and converting the reconstruction error into error energy, calculating an error normalization shape, obtaining an InSAR time sequence deformation sequence and calculating a normalization risk score, and outputting a deformation determination result through DBSCAN clustering; structural damage sensitive features are generated through a curvature residual error and multi-mother wavelet combined spectrum matrix, the multi-scale recognition precision of tiny local damage and the overall deformation trend is improved, steady-state characterization of a tower image in a complex environment is achieved by constructing a sequence reference frame, and the robustness of deformation detection is improved.

This application relates to the field of port foundation deformation monitoring technology, and discloses a risk prediction method for soft soil foundation scenarios. The method includes: acquiring deformation data and usage data at several sampling times within several grid areas; calculating the data difference between adjacent deformation data in each grid area; combining the data difference from a specific historical time to the current time and the grid position coordinates within each grid area into a deformation vector; clustering multiple deformation vectors to obtain one or more clusters; obtaining the correlation between historical overall usage data and historical overall deformation data; obtaining future overall usage data; determining the future overall deformation data corresponding to the future overall usage data based on the correlation; and determining the risk level corresponding to the future overall deformation data. This method can be used to predict the deformation risk of soft soil foundations in use. This application also discloses a risk prediction device and system for soft soil foundation scenarios.