19 results about "Single scan" patented technology

This invention discloses a method for detecting internal defects in concrete based on array ultrasonic imaging, belonging to the field of concrete internal defect detection technology. The method includes the following steps: S1, arranging two or more ultrasonic phased array probes on the surface of the concrete structure to be inspected. Each ultrasonic phased array probe contains multiple independently controllable piezoelectric crystal units for omnidirectional measurement of the concrete structure. This method for detecting internal defects in concrete based on array ultrasonic imaging, by employing ultrasonic phased array technology, achieves electronic deflection and focusing of the sound beam without mechanically moving the probe. Combined with full-matrix capture and synthetic aperture focusing algorithms, it can quickly acquire high signal-to-noise ratio, high-resolution two-dimensional / three-dimensional images in a single scan. This not only increases the detection speed by 3-5 times but also effectively overcomes the "forest-like echo" interference caused by aggregate scattering in traditional single-channel ultrasound, significantly improving the detection rate and positioning accuracy of minute defects (such as fine cracks and local segregation).

This invention discloses a method, system, and storage medium for frequent itemset mining. It requires only a single scan of the transaction database, eliminating the need to sort frequent itemsets in descending order of their support counts or to reorder the items in the transaction database. Even after data is added to the database, there's no need to restart; instead, new transaction items are directly inserted into the existing pattern heap using the algorithm proposed in this invention, incrementally constructing a new pattern heap before rule mining. The invention includes: acquiring a database containing at least one transaction, where each transaction contains at least one data item; scanning the database and dynamically generating a database pattern heap based on the transaction's data items and a preset pattern heap; recursively pruning the heap nodes of the database pattern heap based on a preset minimum support to obtain a frequent pattern heap; and determining frequent itemsets based on the frequent pattern heap mining.

This application discloses a dual-channel image acquisition and processing method and a local on-orbit programming method based on a System-on-Chip (SOC). A first SOC processing unit acquires visible light images, and a second SOC processing unit acquires short-wave infrared images; both undergo preprocessing, target extraction, and JPEG compression. Both processing units utilize heterogeneous SOC chips with integrated RISC-V CPUs and FPGAs, and are independently equipped with DDR3 and SPI NOR Flash. The FPGA integrates connected component labeling and centroid extraction modules, employing a single-scan algorithm for parallel processing and directly outputting centroid coordinates at the end of a single frame scan. Local on-orbit programming uses function-level BIN splitting and CRC comparison, only programming the change modules. JPEG compression adjusts image parameters through configuration registers and automatically reloads the quantization table. This application achieves parallel acquisition of visible and infrared light, real-time centroid extraction, incremental programming, and flexible compression, suitable for aerospace attitude control and remote sensing imaging.

The application discloses a kind of surface defect three-dimensional positioning and visualization method and device based on multi-view fusion;The application realizes the accurate positioning of defect in world coordinate system by the back projection calculation of two-dimensional pixel coordinates and camera pose combination;Secondly, the DBSCAN clustering algorithm is introduced to automatically remove the defect points observed by multi-view, so that the same defect from different angles can be effectively identified and merged, the accuracy of defect counting is improved, and the clustering algorithm does not need to specify the number of clusters in advance, has strong anti-noise interference ability, can improve the clustering accuracy, and can accurately distinguish different defect points;Finally, the application innovatively generates defect distribution model graph and detection coverage display model graph, and carries out visual display;Based on this, not only the real three-dimensional distribution of defect on the surface of object can be intuitively presented, which can assist quality analysis, but also the coverage range of single scanning can be accurately quantified and displayed.

This invention relates to the field of dental implant technology and discloses a scanning bar for dental implant restoration, comprising: a scanning unit, which includes a first wing plate, a position adjustment mechanism detachably connected to the flat end of the first wing plate, and a second wing plate detachably connected to the other end of the position adjustment mechanism; a connecting unit, which is integrally formed on the first wing plate or detachably connected to the first wing plate; a fastening screw; a first boss, which is integrally formed on the first wing plate; and a second boss, which is integrally formed on the second wing plate. This invention sets the integral wing plate of the scanning unit as a detachable and adjustable limiting wing plate combination. The structural distribution of the scanning units of multiple scanning bars can be adjusted according to different parameters of the patient's oral cavity, thereby optimizing the distribution of multiple wing plates in the patient's oral cavity. This enables a single scan to acquire multiple implant scanning parameters, effectively improving scanning efficiency and accuracy, and enhancing patient comfort.

Embodiments of the present application disclose a data processing method of point cloud data, an object grabbing method and a readable storage medium. The method comprises: obtaining a single deployment of a 3D camera to perform single-frame scanning on a target container, and outputting initial point cloud data and an RGB image; a plurality of objects are stacked in the target container, and when a grabbing operation needs to be performed on a target object in the target container, the target container is placed in a 3D camera acquisition area for single-frame scanning; taking the RGB image as input, calling a three-dimensional information prediction model, segmenting the target object from the RGB image by the model, and performing three-dimensional information prediction on the target object, and outputting predicted point cloud data of the target object; and according to the predicted point cloud data, performing completion processing on part of point cloud data of the target object in the initial point cloud data, obtaining point cloud data of the target object after completion, and realizing intelligent grabbing of the target object based on the point cloud data after completion. The problem of insufficient point cloud data under single scanning of a single camera can be effectively solved.

This invention provides a method and apparatus for segmenting polygons using polylines, belonging to the field of data processing technology. The method includes: dividing the polyline and the polygon into multiple line segments based on their inflection points; sorting the events corresponding to the line segments to obtain an event list; and using a polygon segmentation algorithm to iteratively process the events in the event list to obtain candidate line segments and identifiers on both sides of each candidate line segment; determining valid line segments based on the identifiers on both sides of the candidate line segments; and constructing the segmented polygon based on the valid line segments. This method, by using polylines to segment polygons, utilizing a polygon segmentation algorithm to detect the positional relationships between line segments, and simultaneously marking the state on both sides of the line segments, completes the intersection, overlap, and state marking of line segments in a single scan, greatly improving computational efficiency. The more complex the polygon and the more intersection points it has, the more significant the efficiency of this method will be.

This invention discloses a high-efficiency and energy-saving quantum dot film cutting device. The device includes a cutting platform with a robotic arm connected to it via a drive mechanism. A laser emitting unit is mounted on the robotic arm. The device is characterized by a cutting opening within the cutting platform, a diamond micro-blade slidably disposed within the opening, and a handle fastened to the diamond micro-blade. A driven plate is connected to one side of the handle. This invention provides a high-efficiency and energy-saving quantum dot film cutting device that allows direct cutting of the underlying inorganic material via the physical cutting of the diamond micro-blade. The laser only needs to process the upper organic layer, completing the full-layer cutting in a single scan, eliminating the need for multiple repetitive operations.

This invention relates to the field of geometry and drift correction technology for cone-beam CT systems, specifically providing a device and method for synchronously correcting the geometric position and focus drift of a cone-beam CT system. The device includes a correction phantom, a radiation source unit, a moving unit, and a detection unit. The phantom consists of a transparent pressure plate and positioning steel balls, positioning steel bars, and a cross steel bar sandwiched between them. The positioning steel balls are arranged in a square area, with a pair of vertical sides arranged at equal and non-equal intervals to provide angular identification features. The positioning steel bars are located in the middle of the horizontal sides, and the cross steel bar is located at the center of the area, with the intersection point serving as the drift measurement reference. This invention, through its integrated phantom design, can simultaneously complete geometric parameter calibration and focus drift measurement in a single scan without moving or replacing the phantom. The correction method integrates algorithms such as elliptical trajectory fitting, feature point matching, and bicubic spline interpolation, enabling efficient and accurate calculation of the dynamic curves of detector position, attitude, and focus drift.

This invention belongs to the field of magnetic resonance imaging technology, and particularly relates to a multi-voxel spectral reconstruction method and system with ROI adaptive capability. The method includes acquiring a structural image of the scanned object; performing multi-voxel spectral scanning on the scanned object to acquire K-space spectral data; based on the location information of the region of interest (ROI) and interference regions, combined with the point spread function of the spectral scanning system; performing target reconstruction processing on the K-space spectral data according to the optimal voxel localization parameters to generate reconstructed spectral data; and extracting spectral information corresponding to the ROI from the reconstructed spectral data. This invention, through a strategy of multiple adaptive reconstructions in a single scan, can independently calculate the optimal localization parameters and perform targeted reconstruction for each ROI within the field of view based on the same set of K-space data. This allows different anatomical structures to obtain the maximum volume proportion in their dedicated reconstructed voxels without compromising the localization effect between different regions.

The utility model discloses a camera motion module for cosmetic appearance detection relates to cosmetic appearance detection technical field, including mounting panel, and the mounting panel between the two ends is through the fixed link of connecting column. The utility model discloses when using, through the synergic design of camera module and double asymmetric light source module realizes dynamic compensation, and one group light source module adopts 30 degree low angle diffuse light for highlighting surface texture feature, and another group light source module adopts 60 degree polarization directional light for inhibiting specific waveband reflection, and camera module and light source module pulse synchronization, realize the visual inspection of cosmetic appearance under the cooperation of camera field of view area and cooperative illumination area under the clamping autorotation state, and then in single scanning, synchronous acquisition diffuse reflection and polarized light data, and the structure not only has promoted cosmetic appearance detection efficiency, also made the recognition accuracy of reflection interference area get the remarkable promotion, especially suitable for the detection of foundation liquid bottle containing pearl powder.

This invention relates to the fields of image processing and industrial inspection, and provides a quantum-level image reconstruction and dynamic spectral restoration method, comprising: acquiring an original row scan image obtained from a single camera scan, containing information on various exposure pixels arranged in an interleaved column pattern; separating the original row scan image into various sparse exposure images based on a preset pixel arrangement rule; using the original row scan image or a preliminary interpolated image as a guide image, performing guided filtering on the various sparse exposure images to fill in missing pixels, generating various spatially aligned and uniformly reconstructed images with different exposures; and performing weighted fusion on the various reconstructed images with different exposures to generate a fused image, wherein the weights are adaptively determined based on the brightness information of the pixel positions. This invention avoids temporal misalignment and registration errors from multi-frame acquisition, improves acquisition efficiency, and effectively suppresses artifacts and enhances details in dark areas through guided filtering and adaptive fusion.

This invention discloses a method for monitoring the uniformity of coating fabric thickness distribution, comprising: collecting the moisture content of each area of ​​the coating fabric through a humidity sensing module; collecting the angle between the fold ridge line and the scanning path and the density of folds covered in a single scan through a fold angle detection unit to form an initial data set; statistically analyzing the moisture content at the location of the wet area distribution; extracting the fold density and fold ridge line deflection direction of the secondary fold area from the updated monitoring data set; determining the tension matching direction by combining the angle and the moisture content at the location of the wet area distribution; verifying the effectiveness of threshold adjustment based on the density of folds and the fold density and fold ridge line deflection direction of the secondary fold area in the closed-loop monitoring cycle; and evaluating the thickness uniformity of the secondary fold area by combining the distribution pattern of random folds.

This application relates to a method, apparatus, and magnetic resonance imaging system for optimizing multinucleus imaging sequences. The optimization method includes: acquiring the multinucleus imaging sequence to be optimized and determining a target coding axis and non-target coding axes; on the target coding axis, for each nuclide, determining the secondary coding scheme of the nuclide's basic coding sequence, and determining candidate coding sequences for the nuclide based on the basic coding sequence and secondary coding scheme; determining the maximum gradient duration sum for a single scan based on the candidate coding sequences of each nuclide on the target coding axis and the fixed coding sequences of each nuclide on the non-target coding axes; and optimizing the candidate coding sequences of each nuclide on the target coding axis with minimizing the maximum gradient duration sum as the optimization objective to obtain the target coding sequence. This application solves the problems of low signal-to-noise ratio and slow multinucleus imaging speed associated with existing multinucleus imaging sequences.

Systems and methods for fast light field rendering from a three-dimensional (3D) representation of a scene. In at least one embodiment, fast light field rendering exploits cached color values of a plurality of color planes corresponding to a reference view and cached transmittance values of a plurality of transmittance planes corresponding to the reference view to composite a light field quilt via a single sweep through a plurality of sampling planes / volume chunks, thereby enhancing computational efficiency during rendering.

The present disclosure provides an intraoral scanning method, a computing device, and a computer program product. The method comprises: acquiring intraoral scanning data by scanning an oral cavity provided with a scanning rod, wherein the scanning rod is fixed to an implant or an abutment and occludes a partial region of the dental arch; determining dental arch data and scanning rod data from among the intraoral scanning data by means of automatic identification; on the basis of the quality level of the dental arch data, determining whether scanning without the scanning rod in the oral cavity needs to be performed; and in response to determining that the scanning without the scanning rod in the oral cavity does not need to be performed, determining overall spatial information of the oral cavity on the basis of the dental arch data and the scanning rod data. In embodiments of the present disclosure, by merging the existing two scans into a single scan, overall spatial information of an oral cavity can be acquired simply from scanning data involving a scanning rod.

This invention provides a multi-angle visual online inspection device for pyrotechnics, belonging to the technical field of inspection devices. It includes a conveyor belt with a shield installed in the middle, the interior of which is the inspection area. Extension frames are respectively provided at both ends of the conveyor belt. A limiting plate is fixedly installed inside one end of the extension frame to restrict the conveying position of the pyrotechnics. A guide frame for guiding the pyrotechnics into the limiting plate is installed at one end of the limiting plate. This application uses a clamping mechanism with an active rotating wheel and an auxiliary wheel cooperating in a receiving slot. After being clamped, the pyrotechnics detach from the conveyor belt and rotate 360° around their own axis under the drive of the active rotating wheel. Combined with an inclined industrial camera, a single scan is sufficient to complete omnidirectional imaging of the sidewalls and top surface of the pyrotechnics, solving the problem of blind spots in traditional single-sided inspection and significantly improving the inspection coverage. This achieves 360° full-coverage inspection at a single station and effectively improves inspection efficiency during continuous inspection.

This invention relates to the technical fields of laser rapid prototyping control, and provides a method and system for laser precision repair of surface defects in die-cast aluminum mobile phone frames. By acquiring information on the die-cast aluminum grade and anodized layer characteristics, a matching laser repair process model is invoked to identify and locate microscopic defects on the aluminum substrate surface, and a laser scanning path is planned. A high-frequency, low-single-pulse energy scanning strategy with a spot overlap rate greater than a threshold is used to emit pulsed laser light, causing the surface layer of the aluminum substrate in the defect area to micro-melt and re-solidify. The temperature and morphology changes in the repair area are monitored in real time, and the effect of a single scan is evaluated based on the monitoring data. If the results are not satisfactory, the laser process parameters are adaptively fine-tuned, and additional scans are performed within a limited heat-affected zone until the preset appearance quality standard is met. This invention achieves efficient, uniform, and invisible repair of microscopic defects in the substrate without damaging the surface anodized layer through the synergistic optimization of laser parameters, scanning strategy, and thermal management.

This application relates to the field of 3D scanning technology, and provides a reconstruction method, electronic device, and storage medium. The method includes: acquiring multiple first images of an object using a binocular camera; simultaneously acquiring multiple second images of the object's environment using one or more panoramic cameras; for the first images having geometry and / or texture, determining a first pose of the binocular camera based on the first images; for the first images without geometry and texture, determining a second pose of the binocular camera using the simultaneously acquired second images, the positional relationship between the binocular camera and the multiple panoramic cameras; and constructing 3D data of the image based on the first pose, the second pose, and the first images. This method can allow users to simultaneously acquire 3D data of the image and environmental data in a single scan, improving the stability of the constructed 3D data and reducing reconstruction costs.