9 results about "Spatial distortion" patented technology

This application provides an isolation structure and its manufacturing method. The isolation structure includes a substrate, an isolation trench, a flexible dielectric layer, and a filling layer located within the substrate. The flexible dielectric layer is made of hydroxyl-para-xylene. The filling layer covers the surface of the flexible dielectric layer and fills the isolation trench. This flexible dielectric layer can reduce cracks caused by excessive stress in subsequent thermal processes and can adapt to spatial distortion caused by the expansion of residual gas in the isolation trench through deformation under thermal conditions, reducing damage to the substrate, enhancing the electron coupling ability of the HiK material, improving the yield of devices on the substrate, and reducing dark current in devices and white spots in display images from the source. In addition, this flexible dielectric layer does not contain metal, so it will not cause metal ion contamination to the substrate. It eliminates the need for an additional isolation layer, improving the performance of devices on the substrate while simplifying device structure and processes and reducing manufacturing costs.

This invention relates to the field of mobile track geometry state detection technology, and discloses a real-time track state detection method based on multi-sensor fusion and dynamic compensation. It collects multi-source synchronous data from a global navigation satellite system receiver, inertial measurement unit, and laser profilometer mounted on the vehicle body, as well as accelerometers mounted on the bogie, and performs time synchronization and coordinate system unification. Through dynamic error correction and extended Kalman filtering fusion, it achieves high-precision estimation of vehicle attitude, velocity, and position. First-level point cloud motion compensation eliminates spatial distortion caused by the rigid body motion of the vehicle itself on the point cloud collected by the laser profilometer. Second-level point cloud motion compensation eliminates residual geometric errors caused by high-frequency vibration of the bogie. Finally, track geometric parameters are extracted and smoothness analysis is performed. This invention achieves high-precision reconstruction of track point clouds, providing technical support for real-time, high-precision track state monitoring on operating trains.

This invention relates to the field of mobile device camera testing technology, and discloses an Android dynamic adaptive screen camera testing system, including a light sensing module, an algorithm module, a parametric template system, a distortion compensation engine, and a differential rendering module. The light sensing module collects ambient absolute illuminance data; the algorithm module calculates the ambient illuminance gradient and controls the system state flow; the parametric template system reconstructs basic texture parameters based on the gradient to generate a two-dimensional texture of the test pattern; the distortion compensation engine constructs a non-uniform three-dimensional geometric mesh model based on the screen curvature radius and performs spatial distortion calculations on the vertices of the two-dimensional texture; the differential rendering module obtains a feature mask image, performs shading resource reallocation calculations, and sends a timing synchronization trigger command to the camera under test after rendering is completed. This invention can reduce the impact of sudden changes in external ambient light on the pattern display quality and compensate for the geometric deformation at the edges of curved screens.

This invention relates to the technical field of ecological product value accounting, and in particular to an ecological product value accounting mapping system and method based on grid conservation allocation. The system includes a data source access module, a basic data management subsystem, a value accounting management subsystem, a spatialization and consistency engine, and a result output module. The system solves the problem of mismatch between multi-source heterogeneous data through online verification and consistency preprocessing. Utilizing the spatialization and consistency engine, it introduces vegetation net primary productivity weighting in material product allocation and suitability weighting in cultural service allocation, and employs a normalized conservation allocation algorithm. This invention can reveal spatial heterogeneity within a county and strictly ensures the conservation constraint between grid summary values ​​and statistical totals, realizing a closed-loop operation from raw data management to result mapping, improving the authenticity and consistency of accounting results, and solving the problems of spatial distortion, inconsistent definitions, and cumbersome operation in existing technologies.

This invention relates to the field of online detection technology for surface defects of counterweights, specifically disclosing a machine vision-based online detection method and system for surface defects of counterweights. This invention constructs a phase synchronization triggering mechanism based on physical displacement to ensure sub-pixel synchronization between camera line scanning and conveyor belt displacement, eliminating motion blur. It utilizes a high-speed linear scan camera to acquire multiple rows of one-dimensional image data, generating a continuous row pixel sequence carrying absolute spatial position. By extracting physical contour features and calculating instantaneous spatial attitude parameters, spatial distortion correction is performed on the image. Furthermore, by integrating the corrected row pixel data, a virtual global static image with eliminated motion distortion is reconstructed, and a defect recognition algorithm is applied to detect microscopic defects on the counterweight surface, outputting a quality judgment result. This invention effectively solves the problem of microscopic defect detection in high-speed non-uniform motion scenarios, improving the reliability and repeatability of detection.

This invention belongs to the technical field of image data processing and relates to an image processing method and system for adaptive optimization detection of a float position. The method includes the following steps: generating a spatial kinematic tensor based on basic geometric center data; generating a hydrodynamic spatial distortion phase array by modifying the preset standard point matrix distribution coordinates using addressing scaling factors; superimposing and merging the hydrodynamic spatial distortion phase array with the default center reference base address to generate a deformation address offset read / write pointer; merging the distortion spatial feature data to generate a target adaptive filtering pixel matrix; calculating the anti-interference centroid target position based on the entity's vertical contour boundary; generating a defect pointer and triggering a hardware abnormal interrupt level to reset the visual acquisition parameters. This invention solves the problem of limited target detection accuracy and insufficient tracking stability caused by using a fixed image sampling and processing model under dynamic fluid disturbance environments.

The application discloses a wheel image acquisition device based on a heterogeneous composite structure light and a wheel multi-parameter calculation method, relates to the technical field of wheelset parameter measurement, and comprises multiple light measurement units, a photoelectric triggering component and a controller. The multiple light measurement units are installed within the safety limit outside the same steel rail and are arranged in a straight line at equal intervals along the longitudinal direction of the steel rail. The light measurement unit is used for simultaneously generating a spatial laser plane of three common projection optical centers and a single-line laser plane in an excited state, and forming a three-line+single-line heterogeneous composite structure light on a wheel. The light measurement unit is also used for acquiring a local structure light image of the wheel. When the wheel travels, the wheel blocks the photoelectric triggering component, and a switching value signal is generated. The controller is used for generating a triggering pulse according to the switching value signal and controlling the light measurement unit to be in the excited state. The application shortens the wheelset measurement baseline, reduces the dynamic spatial distortion of the image, and improves the image quality of the structure light image.

This invention discloses a multi-scene 3D target detection method for autonomous driving based on uncertainty-aware geometric modeling, comprising: extracting features from multi-view original images; inputting multi-dimensional contextual features in parallel into a height branch network and a depth branch network to obtain global geometric representations and deep geometric representations, and fusing them to obtain BEV features; using a temporal pyramid fusion module to aggregate multi-scale spatiotemporal features of BEV features from k consecutive frames; using a hierarchical refinement decoder to fuse the spatiotemporally enhanced BEV feature map and multi-dimensional contextual features, and obtaining 3D target detection results based on the fused features. This invention can compensate for camera extrinsic parameter perturbations and explicitly model the uncertainty of height prediction, effectively alleviate the geometric discontinuity caused by pixel-level prediction, effectively capture multi-scale spatiotemporal dynamic features, reduce the uncertainty of single-frame estimation, compensate for spatial distortion caused by forward projection, and effectively improve generalization ability and robustness.

A method and system for correcting PCR tube sidewall fluorescence images based on self-calibration inversion, relating to the field of fluorescence image processing, solves the problems of apparent compression, positional shift, and interlayer inconsistency spatial distortion of microdroplets in PCR tube light slide fluorescence microscopy due to the refractive index differences between the outer medium, tube wall, and inner medium, resulting in double refraction of light. The method includes: obtaining the original fluorescence image, determining the tube axis position, the tilt angle of the tube axis relative to the image perpendicular line, and the transition position from the cylindrical to the conical segment from the image, constructing the geometric parameter vector to be inverted, obtaining specific image-related parameters through a staged search based on image consistency indices, and establishing a monotone reversible mapping relationship between the cylindrical and conical segments by combining a strictly non-paraxial refraction model considering the double refraction from the outer medium to the polypropylene tube wall and from the polypropylene tube wall to the water phase inside the tube, and generating a remapping table using self-calibration parameters to complete the zonal geometric correction.