290 results about "Projection direction" patented technology

The invention provides an infrared scene reconstruction and rendering method and device based on three-dimensional Gaussian splashing, and the method comprises the steps: carrying out the processing of preprocessed infrared image data through employing an SfM algorithm, obtaining a sparse three-dimensional point cloud and a camera pose, and setting a Gaussian ellipsoid at the center position of the sparse three-dimensional point cloud, so as to construct a three-dimensional Gaussian point cloud model; inputting the camera pose into a Gaussian microrasterized renderer to render the three-dimensional Gaussian point cloud model to obtain a two-dimensional image of a corresponding view angle; the two-dimensional image and the infrared image data of the camera pose are compared through a loss function, the model is trained, a trained three-dimensional Gaussian point cloud model is obtained, and the loss function comprises a temperature gradient field, the projection position of a Gaussian ellipsoid in a pixel plane under the current camera visual angle and the main axis projection direction; and processing the trained three-dimensional Gaussian point cloud model by using a three-dimensional graphic engine and a 3D Gaussian rasterization renderer to obtain an infrared simulation image. And the authenticity of reconstruction and rendering of the infrared scene is relatively high.

The invention relates to the field of X-ray image processing, and discloses an X-ray image reconstruction method based on direction perception tensor modeling. The method comprises the following steps: acquiring a plurality of X-ray projection images with different incident angles, and establishing a projection direction mapping matrix in combination with tissue direction distribution; constructing a high-order direction perception tensor field based on the mapping matrix and the structure prior information, wherein the high-order direction perception tensor field is used for describing the dominant structure direction and anisotropic response characteristics of each image position; a direction enhancement response diagram is generated through tensor-guided gradient calculation, and dynamic enhancement of local edges is achieved; then structure response intensity is extracted to construct a structure sensitive function graph, and the structure sensitive function graph serves as a weighting factor in image reconstruction; based on the weighted graph and the tensor field, an image reconstruction objective function containing direction consistency constraint is constructed, joint optimization is executed, a regularization item is dynamically updated, and high-fidelity reconstruction of the image under the low-dose condition is achieved. According to the method, the image detail keeping and noise suppression capabilities are improved, and the method has relatively high adaptability and robustness.

The invention provides a vehicle-mounted radar target course angle filtering tracking method and system. The method comprises the steps that S1, the radial speed of clustered point cloud is converted into the absolute radial speed relative to the ground; s2, when a new track is created, an independent course angle extended Kalman filtering tracking module is synchronously initialized; s3, setting a projection direction based on a course angle estimated value output by the module, and completing data association between the point cloud and the track and track state updating through projection; and S4, extracting a position variable quantity based on the updated track state, forming an observed quantity by combining the absolute radial speed of the associated point cloud, inputting the observed quantity to a course angle module for extended Kalman filtering updating, outputting an updated course angle estimated value, and feeding back the updated course angle estimated value to the step S3 of the next frame. According to the invention, by constructing a cooperative closed loop of course angle estimation and data association, the stability of course angle estimation and the overall tracking robustness are significantly improved.

The invention relates to the technical field of numerical simulation modeling, in particular to a complex section open channel flow velocity comprehensive solving method under a multi-point emission mechanism, which comprises the following steps of: performing joint grouping, density statistics and sequence screening on open channel section parameters, disturbance source distribution characteristics and water level gradient data; a dynamic partitioning process driven by structural parameters is established, a lattice structure better fitting non-uniform boundary characteristics is constructed, extension layering is performed on a disturbance projection direction and a propagation path, and a graph neural network is fused to extract the correlation degree between disturbance nodes and construct a propagation path graph, so that the propagation path graph is extracted, and the propagation path graph is constructed. The problem of local propulsion offset in particle propulsion is effectively eliminated, continuity of multi-point disturbance response in an open channel and coordination of particle propagation paths are guaranteed by gradually constructing a multi-scale disturbance response mechanism and dynamic synchronous propulsion logic, and the distribution simulation capability of irregular boundaries and dynamic disturbance fields is remarkably enhanced.

The present invention relates to the field of atmosphere lamps, and in particular to a multi-meteor projection structure, a multi-meteor starry sky lamp and a multi-meteor projection control method. The multi-meteor projection structure comprises a plurality of light path structures; light rays generated by first light sources can sequentially pass through intersection points, first convex lenses and prisms, and are then projected to the outside; light spots formed by the light rays passing through the intersection points move along with the movement of the intersection points, and are amplified by the first convex lenses, the projection angle is changed by the prisms, and the meteor effect can be formed on the ceiling and / or the wall; and the light rays generated by the multiple first light sources can achieve the effect of generating multiple meteors at the same time by means of the respectively corresponding light path structures. By adjusting the rotation speed of a rotating disc and permutation and combination of the projection directions of multiple groups of first slits, second slits and prisms, a user can obtain numerous gorgeous and unduplicated meteor effects, and compared with a single-meteor effect, the user experience is improved to obtain a qualitative leap.

The invention discloses a ship spherical global image splicing method and system based on image processing, and the method comprises the following steps: obtaining multi-camera images which are distributed at the top, the bottom and the annular direction, and executing camera calibration and distortion correction; performing hemispherical projection and cylindrical projection by using a hybrid projection link; feature point extraction and matching are carried out, and an initial registration relation between adjacent view fields is established; executing APAP gridding local registration of projection perception, and generating local homography by applying an anisotropic weight kernel consistent with the region projection direction to obtain a partition alignment result set; carrying out weighted fusion and stitching suppression on the overlapped region to generate a panoramic spliced image; and converting the panoramic spliced image into an interactive three-dimensional panoramic view. According to the method, mixed projection and projection perception APAP algorithms are fused, ship spherical surface global high-precision splicing and three-dimensional immersion display are achieved, and the method has the advantages of being small in distortion, high in precision and high in visibility.

The invention discloses a colon adenoma identification method and device based on Mueller matrix polarization measurement and regularization, a storage medium and electronic equipment. The method comprises the following steps: acquiring a polarization image corresponding to a fresh medical sample containing colon adenoma and normal tissue through a light polarization system, and preprocessing the polarization image; fourier analysis is carried out on a detection signal in the light polarization system to obtain a Mueller matrix, and a Lu-Chipman polarization decomposition algorithm is used for carrying out polarization decomposition on the Mueller matrix to obtain three polarization decomposition parameters; obtaining polarization data of a plurality of channels based on the Mueller matrix, and constructing a sample set based on the polarization data; constructing a target function based on the projection function and the sample set, solving the target function to obtain an analytic solution of the optimal projection direction, and calculating a characteristic value based on the analytic solution of the optimal projection direction; and classifying the polarization images corresponding to the fresh medical samples of the colon adenoma and the normal tissue based on the feature values to obtain a classification result. The lesion recognition rate can be improved.

This utility model provides a fully automatic multi-style handle cutting device, including a frame, a worktable, a first baffle, a second baffle, a cutting component, a feeding cylinder, and a discharging cylinder. The worktable and cutting component are mounted on the frame. The first and second baffles are arranged parallel to each other on the worktable, forming a first feeding channel between them. The cutting component is located at one end of the first feeding channel, and the discharging cylinder and feeding cylinder are located at the other end of the first feeding channel. The feeding cylinder and discharging cylinder are mounted on the worktable. The central axis of the feeding cylinder is parallel to the center line of the first feeding channel, and the central axis of the discharging cylinder is perpendicular to the central axis of the feeding cylinder in the orthographic projection direction. Compared with other handle cutting methods, this device has high working efficiency, can meet the needs of large-scale production, and significantly improves operational safety. It also improves processing accuracy, enhances the stability of the handle's forward movement, and can meet various handle cutting requirements.

A sheet feeding apparatus includes a stacking portion, a rotary feeding member configured to feed the sheet in a sheet feeding direction, a first separation portion including a separation surface, the detachable unit including a second separation portion. A direction that intersects both the sheet feeding direction and a rotation-axis direction of the rotary feeding member, and that extends from the separation surface toward the rotary feeding member is defined as a projection direction. The second separation portion is positioned downstream of the separation surface in the projection direction in a state where the detachable unit is attached to the first separation portion. Another portion of the detachable unit other than the second separation portion is positioned upstream of the separation surface in the projection direction in a state where the detachable unit is attached to the first separation portion.

The invention relates to the technical field of data processing, in particular to a handwritten font recognition and storage method for cold data archiving management. The method comprises the following steps: dividing a single font image into an intrinsic structure main body area and a style induction offset area based on the number of effective pixel points in each projection direction; determining a style influence degree according to the main body area and the offset area; clustering the single font images according to the style influence degree to form a cluster; according to the number of the single-font images in the clustering cluster and the style influence degree numerical range, the aggregation degree of the clustering cluster is determined; determining font structure ambiguity according to aggregation degree difference characteristics among the clusters; determining the overall font ambiguity by combining the font structure ambiguity; inputting the text image and the overall font ambiguity into a pre-training style correction model, and outputting a corrected text image; according to the method, the OCR algorithm is adopted to recognize and correct the handwritten fonts in the text image and store the handwritten fonts, so that the false recognition rate of handwritten font recognition is effectively reduced.

The application discloses a particle screenshot method and related equipment, the method comprises the following steps: acquiring a particle image to be processed, and cutting a field of view region from the particle image based on a preset frame selection range; performing integral projection on the field of view region to obtain a one-dimensional sequence group; performing weighted standardization on the initial one-dimensional sequence based on the field of view size of the field of view region in the projection direction to obtain a weighted one-dimensional sequence; performing smoothing processing on the weighted one-dimensional sequence to obtain a smoothed one-dimensional sequence; performing local peak marking based on the smoothed one-dimensional sequence to obtain a local peak position; converting the local peak positions corresponding to two projection directions of the horizontal direction and the vertical direction to obtain a particle position; and cutting a particle screenshot of a target particle from the field of view region based on the particle position. By introducing the weighted standardization link based on the field of view size, and combining the bidirectional integral projection, sequence smoothing and local peak detection, the particle positioning and screenshot can be efficiently and accurately realized. The application can be widely applied in the field of image processing technology.

The utility model discloses a visual communication projection device, and relates to the technical field of projection devices, the visual communication projection device comprises a bottom plate, the rear side of the top of the bottom plate is fixedly provided with a hollow stand column, an L-shaped rod is inserted in the hollow stand column, one end of the L-shaped rod is fixedly provided with a steering engine, and the output end of the steering engine is fixedly provided with a placing assembly. A projector is mounted in the placement assembly; universal wheels are fixedly installed at the four ends of the bottom of the bottom plate, hand-screwing bolts are installed on the upper sides of the outer surfaces of the hollow stand columns in a threaded mode, a plurality of through holes are formed in one side of the outer surface of each L-shaped rod from top to bottom at equal intervals, and the through holes are matched with the hand-screwing bolts. Through the innovation points of flexible height and position adjustment, free projection direction adjustment, efficient heat dissipation design, stable clamping protection and the like, the use flexibility and applicability of the projector are greatly improved, and the diversified requirements in the fields of modern multimedia display, education and teaching, business conferences and the like are met.

The present invention provides a system and method for calibrating the geometric features of three-dimensional interference fringes. The system combines a high-precision linear motorized translation stage with a matrix camera. A control program is used to manipulate the translation stage along the projection direction of the interference fringes, while the camera is controlled to capture interference fringes at different locations to produce a three-dimensional image of the fringes. A spatial Fourier transform, Gaussian fitting, and a maximum position extraction algorithm are used to calculate the spatial frequency of the variations in light and dark fringes, thereby calibrating the fringe spacing of the interference fringe system based on pixel size. Image binarization and an edge detection algorithm are used to extract the fringe boundary contours, calibrate the height and width of the interference fringe area, and ultimately evaluate the geometric features of the three-dimensional interference fringe system. This system and method can provide a more comprehensive calibration of interference fringe systems.

This application provides a method, apparatus, device, medium, and program product for determining a vehicle cleaning path. The method maps the 3D point cloud data of the vehicle to be cleaned to a 2D space according to the Z-axis and X-axis projection directions to obtain an unobstructed area; it then segments the unobstructed area to obtain a list of cells and a scan line corresponding to each cell; using a path connection algorithm, it generates candidate cleaning paths in the 2D space based on the cell list and the scan line corresponding to each cell; finally, it maps the candidate cleaning paths to a 3D space using bivariate spline interpolation to obtain the target cleaning path. This application avoids the redundant path problem of traditional segmentation methods by mapping the vehicle's 3D point cloud data to a 2D space and then performing region decomposition and path planning; finally, it maps the paths from the 2D space back to the 3D space using bivariate spline interpolation, ensuring the continuity and coverage integrity of the cleaning path.

The invention relates to the technical field of size detection, and discloses a detection structure and a method thereof. The detection structure comprises a first detection assembly composed of an image acquisition module and a first laser projection module, the first laser projection module is installed on the side of the image acquisition module, and the projection direction of the first laser projection module intersects with the acquisition direction of the image acquisition module; the first laser projection module is used for measuring the three-dimensional size of an object to be measured; the image acquisition module is used for measuring the plane size of the to-be-measured object; the collection area of the image collection module and the projection area of the first laser projection module form a first detection area. Through cooperation of the image acquisition module and the lateral laser projection module, synchronous high-precision detection of the plane size and the three-dimensional contour is realized, the measurement error is effectively reduced, and the detection accuracy and stability are improved.

The invention provides a focusing method, electronic equipment and a computer readable storage medium. The focusing method comprises the following steps: determining an orientation of a target shooting object in a whole visual field range; controlling the driving assembly to drive the ranging light source to deflect so that the projection direction of the ranging light source points to the target shooting object; controlling the ranging light source to emit first light to irradiate the target shooting object, and controlling the ranging sensor to receive second light reflected by the target shooting object; and determining a first object distance according to the first light and the second light, and controlling the optical lens to focus according to the first object distance. The intensity of light output by the ranging light source can be reduced to reduce power consumption, and the focusing precision of the camera module can be improved.

The utility model discloses amusement equipment with a rotary projection table. The amusement equipment comprises the projection table and an illuminator. The outer table top of the projection table can rotate around the inner table top; the light emitter is located in the center of the inner table top, each light projection face of the light emitter is used for projecting the graphic cards on the outer table top to the corresponding screen, and therefore the static graphic cards on the outer table top are projected into dynamic pictures, and background pictures formed by projection of transparent objects on the inner table top are added. And a richer visual effect is presented on the screen. According to the rotary projection table amusement equipment, multiple projection directions can be provided and projected to multiple screens, more players can play at the same time, projection pictures can be independently designed, children can experience optical charm, and teaching through lively activities is achieved.

To reduce a situation where geometric correction frequently changes unintentionally.SOLUTION: A correction method includes: when a projection angle that is an angle formed by a horizontal plane and a projection direction of a projector is an angle within a first range, applying first geometric correction for correcting distortion of an image projected on a first projection surface from the projector; when the projection angle is an angle within a second range different from the first range, applying second geometric correction for correcting distortion of an image projected, from the projector, on a second projection surface intersecting the first projection surface; when the projection angle changes from the angle within the first range to an angle within a third range that is a range between the first range and the second range, applying the first geometric correction; and when the projection angle changes from the angle within the second range to the angle within the third range, applying the second geometric correction.SELECTED DRAWING: Figure 3

The wide-angle starry sky projection lamp comprises a main body, a light source, a film tray and a projection lens, and the film tray is separably inserted into a space formed between the light source and the projection lens; a light gathering device is arranged between the light source and the film tray and is suitable for gathering light rays emitted by the light source in an area where the film is located; in the projection lens, in the projection direction of a film, an imaging lens configured as a single convex aspheric lens with positive focal power; the collimating lens is configured to be a biconvex aspheric lens with positive focal power; the wide-angle lens is configured to be a single concave aspherical lens with negative focal power; light with a preset film pattern is projected on a specified interface after passing through the imaging lens, the collimating lens and the wide-angle lens so as to form a starry sky projection effect, the projection lens in the projection lamp realizes effective control and optimization of the light by reasonably configuring the focal power and the shape of each lens, and the definition and the brightness of a projection picture are high.

A projection image adjustment apparatus includes a base attached to a projection apparatus to project a light in a projection direction; a mover to move the base in a movement direction; and a rotator including a mount to mount the base attached to the projection apparatus; and an imaginary rotation axis perpendicular to a plane including the movement direction and the projection direction. The mount is rotatable about the imaginary rotation axis. The imaginary rotation axis passes through a region of the projection apparatus mounted on the mount via the base.

The invention discloses a particle screenshot method and related equipment, and the method comprises the steps: obtaining a to-be-processed particle image, intercepting a visual field region from the particle image based on a preset frame selection range, carrying out the integral projection of the visual field region, and obtaining a one-dimensional sequence group; performing weighted standardization on the initial one-dimensional sequence based on the view size of the view area in the projection direction to obtain a weighted one-dimensional sequence; smoothing the weighted one-dimensional sequence to obtain a smooth one-dimensional sequence; performing local peak marking based on the smooth one-dimensional sequence to obtain a local peak position; according to the local peak positions corresponding to the transverse and longitudinal projection directions, particle positions are obtained through conversion; and capturing a particle screenshot of the target particle from the view area based on the particle position. The particle positioning and screenshot can be efficiently and accurately realized by introducing a weighting standardization link based on the view size and combining the bidirectional integral projection, the sequence smoothing and the local peak detection. The method can be widely applied to the technical field of image processing.

The present application relates to the technical field of display control, and discloses a control method and device of a head-up display system, a vehicle, a medium and a program, which collects user sound data by using sound collecting devices located at different positions, and then determines sound source coordinates and a sound source orientation by sound source positioning. Next, the distance between the user's eyes and the sound production site is determined, and the sound source coordinates and the sound source orientation are corrected according to the distance and the voiceprint characteristics. The method has less environmental interference, can obtain more accurate user eye coordinates and eye view angles, is more efficient than tracking the user's eyeball focal point by using a camera, and has lower requirements for system hardware configuration. Finally, the light machine projection direction is adjusted according to the user eye coordinates and the eye view angles, so as to realize eye following of the projection content, without the need for the user to manually adjust the projection direction, thereby improving the user's use experience.

To adjust the position of a lintel in the depth direction.SOLUTION: An opening / closing device, including a storage section 30, an opening / closing body 10 drawn out from the storage section 30, and a lintel 40 through which the opening / closing body 10 is inserted on the closing direction side of the storage section 30, further includes a lintel adjusting member 50 which is connected at one end side to the lintel 40 and at the other end side to the storage section 30 to adjust the position of the lintel 40 in the depth direction.SELECTED DRAWING: Figure 6

A sealing arrangement structure configured to position a ring seal (1) between a first element (10A) and a second element, comprising the first element (10A) and the ring seal (1), wherein the seal (1) comprises an annular section main body (4) extending in an axial direction of the seal (1) and a projecting section (5) projecting from the annular section main body (4) in an outward direction or inward direction, wherein the first element (10A) is provided with a recessed section (25) configured to accommodate the projecting section (5) and formed in a shape corresponding to the projecting section (5), wherein the projecting section (5) is designed such that a circumferential dimension (L5) of an upper section (5A) thereof in a projection direction is larger than a circumferential dimension (L6) between base parts (P2) thereof, wherein a circumferential dimension (L3) of the excluded section (25) on a rear side in the projection direction is larger than a circumferential dimension (L4) of the excluded section (25) on a front side in the projection direction, and the circumferential dimension (L4) of the excluded section (25) on a front face in the projection direction is larger than the circumferential dimension (L5) of the upper section (5A) of the projecting section (5) in the projection direction.

The invention relates to a projection image adjusting device, an image projection device and an image projection system. The purpose of the present invention is to provide a projection image adjustment device for easily adjusting a projection image projected on a projection surface. A projection image adjusting device according to the present invention comprises: a base unit to which a projection device is mounted; and a moving unit that moves the position of the base unit in a predetermined moving direction. The projection image adjustment device further includes a rotation mechanism that rotates the projection device about a rotation axis perpendicular to a plane including the movement direction and a projection direction of the projection device. The rotating shaft is located in a region passing through a projection device mounted on the base portion.

The application discloses a kind of artificial hole visual guidance design method and visual guidance device, establish the single light source optical projection parameter model of artificial hole perpendicularity and depth visualization guidance, the eccentricity attribute index is used, trajectory center deviation degree is carried out point light source projection trajectory shape simulation analysis;Determine the number of point light source that the hole making tool needs to be arranged;According to workpiece processing size, tool length determines the distance of point light source to the center of processing device for guiding perpendicularity and guiding depth;According to point light source projection trajectory shape simulation analysis, obtain the range of the angle between the light beam projection direction of the point light source for guiding perpendicularity, the point light source for guiding depth and the straight line where the point light source and the center of hole making tool are located.The hole making perpendicularity is fed back by the visual information feedback such as projection pattern shape change, center deviation degree, the hole making feed depth is fed back by the real-time change of trajectory perimeter, effectively improve the hole making quality and stability.

This application relates to the field of green screen lighting technology, specifically disclosing a lighting structure for assisting in green screen background replacement, comprising: a housing, with a fill light installed inside the bottom side of the housing, and an adjustment component on the top of the housing; the adjustment component includes an electric telescopic rod, with a mounting bracket fixedly connected to the telescopic end of the electric telescopic rod, a servo motor installed inside the mounting bracket, a suspension bracket on the housing, and a rotating shaft fixedly connected to the inner side of the housing; this application achieves precise adjustment of the horizontal angle of the fill light by driving the suspension bracket and the housing to rotate via the servo motor; simultaneously, with the cooperation of a self-locking motor, gear one, gear two, and the rotating shaft, the housing is deflected within the suspension bracket, thereby achieving precise control of the fill light deflection angle, enabling comprehensive and fine adjustment of the fill light from three dimensions: height, horizontal angle, and deflection angle, meeting the diverse needs for light projection direction and coverage in different scenarios.

For motion-compensated reconstruction in an imaging process, projection images (7) generated by the imaging process are obtained, representing an object from a multitude of different projection directions. Depending on the projection images (7), three-dimensional first image data (8) are reconstructed. Consistency data (9), which quantifies data consistency for each pair of projection images (7), are generated. Depending on the consistency data (9) and the three-dimensional image data (8), input data (10) are generated. Motion data (12), which characterizes object movement and / or motion artifacts in the first image data (8), are generated by applying a trained machine learning model (MLM) (11) to the input data (10). Depending on the projection images (7) and the motion data (12), three-dimensional, at least partially motion-compensated second image data are reconstructed.

The utility model discloses a kind of suspension type multidimensional adjustable projectors, including projector and inverted recess type frame, the middle part of the outer surface of the front end of projector is provided with lens, the middle part of the outer surface of inverted recess type frame upper end is installed with projection direction adjusting assembly, the side of projection direction adjusting assembly is provided with dustproof structure, the bottom of the outer surface of inverted recess type frame right side is installed with projection angle adjusting assembly, the middle part of the outer surface of projector left end is fixedly installed with first driven shaft, and the first driven shaft is connected with inverted recess type frame left lower portion. The utility model is projected by the projection angle adjusting assembly of being set, the angle of projector is conveniently adjusted, the projection direction adjusting assembly of being set is conveniently adjusted, the direction of projector is projected, the dustproof structure of being set is conveniently protected lens when projector is not used, reduce the accumulation of dust.

A projection system capable of realizing various image expressions is provided. The projection system includes a screen (100), an image projection device (200) that projects an image toward the screen (100), and a conveyance stage (500) that holds the image projection device (200) and is movable. The conveyance stage (500) has a projection direction variable portion that makes a projection direction of the image variable, and a support mechanism (400) that supports the screen (100) in a manner that allows adjustment of a position of the screen (100) in a direction that intersects a setting surface on which the conveyance stage (500) is set.