10 results about "Scan conversion" patented technology

The invention relates to the technical field of metal 3D printing, and discloses an LPBF metal 3D printing method and system based on discrete point dynamic regulation, and the method comprises the steps: decomposing a slice layer contour range of a 3D model into a dot matrix with set density and uniformly distributed scanning points; setting laser parameters of each scanning point in the dot matrix, wherein the laser parameters comprise power and exposure time; based on a dot matrix, planning a scanning sequence of all scanning points as a scanning path; controlling the laser to scan according to the scanning path, and scanning each scanning point on the scanning path by adopting the corresponding laser parameter; and converting to the next layer of slice of the 3D model, and repeating the steps until the scanning of the whole 3D model is completed. According to the method, a traditional one-dimensional vector line scanning path is converted into a zero-dimensional and programmable dot matrix, each scanning point is independently endowed with scanning power and laser exposure time, inertia-free scanning of any geometric path and complex characteristics is achieved, and the method is suitable for aerospace lightweight dot matrix structures, medical porous implants and other application scenes.

The invention relates to the technical field of metal 3D printing, and discloses an LPBF metal additive manufacturing path planning method and system based on a thermal stress interlayer active release mechanism, and the method comprises the steps: setting a stress release region as a target slice layer in a slice layer contour range of a 3D model; acquiring a plurality of partitions for realizing a stress release function in a target slice contour layer range, and planning a scanning path for each partition; controlling the laser to scan each subarea according to the corresponding scanning path, and randomly skipping in a plurality of adjacent subareas until scanning of all subareas is completed; the next slice layer is converted to serve as a new target slice layer, a stress release area similar to the original target slice layer is arranged on the new target slice layer, and interlayer dislocation design is adopted for the new stress release area and the original stress release area; and repeatedly scanning and skipping to the next slice layer until scanning of all slice layers in the whole 3D model is completed. By designing the controllable stress release structure, stage reduction of thermal stress is achieved.

Systems and methods for tuning ultrasound imaging are provided herein. The method comprises: displaying a first scan-converted ultrasound image on a display (S411) based on a first scan line of ultrasound imaging data; receiving screen coordinates of a display point in the first scan converted ultrasound image, the display point having a corresponding depth (S412); converting the screen coordinate of the display point into a data coordinate of a corresponding data point in the first scan line (S413); adjusting a parameter of the first scan line at a scan depth of the data coordinates of the data point to provide a second scan line of the ultrasound imaging data, including the adjusted parameter (S414); performing a scan conversion on the second scan line to obtain a second scan converted ultrasound image, where the second scan converted ultrasound image is changed at a depth of the display point in response to the adjusted parameter (S415); and displaying the ultrasound image converted by the second scan (S416).

The invention relates to the technical field of medical treatment, in particular to ultrasonic equipment and a scanning conversion method for ultrasonic imaging. According to the ultrasonic equipment and the ultrasonic imaging scanning conversion method provided by the invention, after the target point on the detected part corresponding to the display position point is determined according to the position information of the display position point in the display interface, the reference detection point is interpolated according to the blood flow direction of the at least one reference detection point corresponding to the display position point; the method comprises the steps of obtaining a plurality of interpolation sampling points, determining the blood flow velocity and the blood flow direction of each interpolation sampling point according to the blood flow velocity and the blood flow direction of at least one reference detection point, and finally determining the blood flow velocity corresponding to a target point according to the blood flow velocity and the blood flow direction of each interpolation sampling point. Therefore, the ultrasonic image more conforming to the hemodynamics is obtained, and abnormal artifacts which do not conform to the hemodynamics in the ultrasonic image can be reduced.

The application discloses a scene monitoring radar target and shadow identification method based on morphology, which comprises the following steps: S1, acquiring a radar original video signal; S2, performing scan conversion on the radar original video signal to obtain a P-display mode graph; S3, processing the P-display mode graph to obtain a P-display mode foreground graph; S4, performing graphology processing and contour identification on the P-display mode foreground graph to obtain a P-display mode suspected target outer contour set; S5, processing the P-display mode suspected target outer contour set by adopting a morphological identification method to obtain a shadow convex hull; S6, judging whether the shadow convex hull is in a target shadow area; S7, if yes, the suspected object is a shadow, and if not, the suspected object is a target; S8, comparing echo intensities of the suspected shadow and the suspected target, and if the echo intensity is greater than a set value, the suspected object is a target, and if the echo intensity is less than the set value, the suspected object is a shadow. The method can effectively identify the target and the shadow, and can improve the identification and detection capability of the system on the target.

Disclosed herein is an optical system that combines optics with a one-dimensional scanner to achieve two-dimensional scanning. The system includes a light source emitting a beam, which is steered in one dimension by a scanner. The optics then convert this one-dimensional scan into a two-dimensional scan across the target scene. The optics comprises multiple distinct optical channels integrated into a single surface, each designed to manipulate light in a specific manner. This arrangement allows for precise control over beam direction, size, and shape, enabling selective illumination of scene elements and adaptable scanning patterns. The system also incorporates a detector and control circuitry to generate a depth map of the scene.

The application discloses a curve weld processing method based on a pre-scanning mode, comprising the following steps: scanning and converting to obtain weld point cloud data in a workpiece coordinate system; performing filtering processing on the obtained point cloud data to obtain filtered data; according to the angle value of the point data in the workpiece coordinate system, the filtered data is segmented according to the angle, and there is overlap between every two segments, curve fitting is performed on each segment of the segmented data; connecting and merging the curve fitted data; filtering the merged fitted data to obtain a backtracking point; and performing welding setting on the point cloud data after filtering out the backtracking point. In the pre-scanning mode, the obtained point cloud data is preprocessed, segmented, curve fitted, merged and filtered to the backtracking point, so that one-time welding of an irregular spiral weld in the pre-scanning mode can be realized, welding cost is reduced, and the method can be suitable for regular or irregular curve welds, welds with large local curvatures, special welds such as wrap angles or weld segments, and the like, and the weld data is accurate.

A method (400) includes receiving an image scan (40) of a patient and extracting, from the image scan having a first image format (40A), metadata (202). The method also includes standardizing the metadata extracted from the image scan having the first image format according to a format of a schema (200) associated with a relational database (190), and storing the received image scan having the first image format in data storage (180) and the standardized metadata in the relational database. The method also includes converting the image scan having the first image format into a corresponding image scan having a second image format (40B) different than the first image format, and storing the corresponding image scan having the second image format in the data storage.

The application discloses a kind of automatic trauma focus ultrasonic evaluation method and system, wherein the system includes: data acquisition module, receive the ultrasonic echo signal of human tissue, the received ultrasonic echo signal is sampled by analog-digital converter and forms data stream;Signal processing module, data stream is demodulated to base frequency, and signal is handled by low-pass filter and logarithmic compression, and the signal after processing is obtained;Data transmission module, the signal after processing is transmitted to eFast auxiliary diagnosis module and ultrasonic imaging module;eFast auxiliary diagnosis module, the ultrasonic image corresponding to the signal after processing is divided into trace, small amount, medium amount and large amount according to the free degree of liquid, and the diagnostic result is obtained;Ultrasonic imaging module, scanning conversion, digital gain compensation, dynamic range adjustment and post-processing in image domain are carried out to ultrasonic image, and the processed ultrasonic image is obtained;Result output module, the diagnostic result and the processed ultrasonic image are fused, and the evaluation examination result is obtained.

The application relates to the technical field of metal 3D printing, and discloses an LPBF metal additive manufacturing path planning method and system based on a thermal stress interlayer active release mechanism, which sets a stress release area as a target slice layer in the slice layer contour range of a 3D model; a plurality of partitions achieving the stress release function in the target slice contour layer range are acquired, the scanning path of each partition is planned respectively; laser is controlled to scan each partition according to the corresponding scanning path, and random jumping is performed among the plurality of adjacent partitions until the scanning of all the partitions is completed; the next slice layer is converted as a new target slice layer, a stress release area similar to the original target slice layer is set in the new target slice layer, and the new stress release area and the original stress release area are designed to be interlayerly dislocated; the next slice layer is repeatedly scanned and jumped until the scanning of all the slice layers in the entire 3D model is completed. The application realizes the phased reduction of thermal stress by designing a controllable stress release structure.