486 results about "Projection plane" patented technology

The invention discloses a pipe online defect detection method and system, and relates to the technical field of image detection. The detection method comprises the following steps: placing a to-be-detected pipe in a dark box environment, irradiating the to-be-detected pipe in a rotating state through a light source, displaying a pipe projection on a projection surface, and setting a detection line at the upper end of the projection surface; comparing the detection line with a set reference line in real time, and marking a suspected warping area according to the local offset; performing three-dimensional image reconstruction on the suspected warping area to generate a simulation three-dimensional point cloud model; the method is technically characterized in that preliminary judgment passes through a grading strategy of'rapid screening-precise reinspection ', and the detection speed and precision are balanced; by means of the optical path principle and threshold value comparison, positioning operation of the whole-surface suspected warping area can be rapidly completed, only data of a local area (suspected warping area operation) is analyzed, the hardware cost and energy consumption are greatly reduced, and the high-speed online detection requirement is met.

The invention discloses a multi-person point cloud human body posture reconstruction method and system based on a millimeter wave radar, and the method comprises the steps: firstly generating a three-dimensional point cloud through radar echo preprocessing, and achieving the noise filtering and target separation through the combination of detection region division and a multi-stage DBSCAN clustering algorithm; secondly, a multi-scale feature fusion neural network is constructed, projection plane interference is isolated through grouping convolution, space details are reserved based on a deep high-resolution module, key feature extraction is enhanced through an improved ResNet18 embedded coordinate attention and channel attention mechanism, and end-to-end human body 23 joint three-dimensional coordinate regression is achieved. The system supports synchronous reconstruction of postures of multiple persons through real-time point cloud classification and parallel reasoning, and the frame rate reaches 30-40 FPS in a complex scene. The method gives consideration to privacy protection and high robustness, and can be widely applied to the fields of smart home, smart health care and security monitoring.

The embodiment of the invention provides a target segmentation method and device for a multi-view image, electronic equipment and a storage medium, and the method comprises the steps: obtaining scene images of different views obtained by a plurality of image collection devices which are deployed in a target scene in advance, and carrying out the three-dimensional Gaussian reconstruction, and obtaining a three-dimensional Gaussian point cloud corresponding to the target scene; in response to a segmentation prompt instruction corresponding to a target segmentation article in the scene articles, performing two-dimensional article segmentation on the scene image, and generating a corresponding binary segmentation mask; carrying out projection processing on the three-dimensional Gaussian point cloud to obtain projection planes of a plurality of visual angles, and carrying out Gaussian point filtering on each projection plane based on the binarization segmentation mask to obtain a filtered three-dimensional Gaussian point set; and based on the pose point cloud estimation information, the filtered three-dimensional Gaussian point set is sequentially splashed to device planes corresponding to a plurality of image acquisition devices to obtain a corresponding target segmentation result, so that the accuracy of object two-dimensional image segmentation in a target scene is greatly improved.

The invention relates to a region-limited virtual touch interaction method and related equipment, and the method comprises the following steps: carrying out the boundary scanning of a region-limited projection plane, and obtaining a projection region contour coordinate set; performing region division on a projection plane based on the projection region contour coordinate set to obtain interaction region grid data; performing three-dimensional feature point collection on the hand of the user through a depth camera to obtain a hand key point space coordinate sequence; when the hand key point space coordinate sequence is within a depth interaction threshold range of interaction area grid data, collision detection is carried out on the hand key point space coordinate sequence based on the interaction area grid data, and a touch event judgment result is obtained; and performing visual feedback rendering on the interaction area grid data based on the touch event judgment result to obtain interaction state display data, thereby solving the technical problem of low interaction precision caused by difficulty in accurately positioning a gesture of a user in an open and irregular space in an existing solution.

The application relates to the technical field of terminals, and discloses an electronic device and a cover. The electronic device comprises a cover, a display screen assembly and a main body. The cover is used for shielding a gap between the display screen assembly and the main body. The cover comprises a first part and a second part which are connected. The first part covers at least part of the edge of the display screen assembly. The second part extends from the first part towards the main body. The inside of the main body comprises an acoustic cavity, and the cover and / or the main body is provided with an acoustic outlet channel which is connected to the acoustic cavity and the outside of the mobile phone. The acoustic outlet of the acoustic outlet channel has an area greater than 0 in the region of the orthographic projection of the side projection plane. The side projection plane is perpendicular to the plane in which the display screen assembly is located and parallel to the edge of the display screen assembly corresponding to the acoustic outlet channel. The electronic device described above cannot be observed from the front, the acoustic outlet channel and the internal components cannot be observed, the appearance is improved, meanwhile, the size space of the display screen assembly can be increased, and the space utilization rate of the electronic device is improved.

The invention relates to the technical field of deep neural network training, and discloses a deep neural network training diagnosis method and system based on gradient visualization and loss curved surface analysis, and the method comprises the steps: obtaining a parameter snapshot of a neural network trained to t-th iteration, sampling k random detection vectors, and calculating a Hessian vector product; performing Lanczos iteration on each random detection vector to obtain k symmetric tridiagonal matrixes and calculating a characteristic value density spectrum; mapping the k symmetric tridiagonal matrixes into orthogonal projection base vectors, constructing a two-dimensional projection plane, determining a saddle point state according to the integral of the characteristic value density spectrum in a negative value region, determining a flat region according to the peak value of the characteristic value density spectrum in a zero value region, and determining a sharp minimum value according to the peak value of the characteristic value density spectrum in a positive value region; according to the method, the descending path with the steepest curvature can be captured, and the dominant mode of the dynamics can be optimized, so that the projected loss curved surface truly reflects the geometric structure change in the training process, and the pathological diagnosis of the training process based on the second-order geometric information is realized.

The invention provides a humidifying tank and breathing assisting equipment, the humidifying tank comprises a tank body, a base plate and a sealing piece, the sealing piece is installed between the inner surface of the side peripheral wall of the tank body and the base plate, and the sealing piece is used for keeping the tank body and the base plate sealed and connected; a first fixing part is arranged at the open end of the tank body, the chassis comprises a second fixing part, and the second fixing part is connected with the first fixing part in a matched mode, so that the chassis is installed at the open end of the tank body and defines an inner cavity with the tank body to contain liquid; a limiting part is arranged on the tank body or the base plate and used for being matched with a main machine of the breathing assisting device to install the humidifying tank. The orthographic projection of the limiting part and the orthographic projection of the sealing piece on the same projection plane at least partially coincide in the projection direction perpendicular to the axial direction of the side peripheral wall. The technical problem that the sealing ring shields the water level height in the humidifying tank is mainly solved, and low-water-level recognition of the breathing assisting device is achieved; the chassis and the tank body are respectively provided with a fixing part, so that firm connection is ensured, and meanwhile, disassembly and assembly are convenient.

The first aspect of this application proposes a method for fusing laser point cloud and visible light image, including: S1, performing spatial dimensionality reduction on the point cloud data to obtain two-dimensional point cloud data; S2, extracting feature points of the two-dimensional point cloud data and feature points of the visible light image data through the Scale-Invariant Feature Transform (SIFT) algorithm; S3, determining the projection plane, projecting the point cloud data through the projection model to generate a depth-echo intensity image, and constructing a 3D-2D coordinate mapping relationship between the point cloud data and the depth-echo intensity image; S4, mapping the feature points of the visible light image data to the point cloud data according to the 3D-2D coordinate mapping relationship. This solution can achieve a good image registration and fusion effect, can be applied to various platforms, and has a wide range of applicable scenarios. The second aspect of this application proposes a system for fusing laser point cloud and visible light image.

A remote operator terminal is used by a remote operator for a remote operation of a moving body. A first image is captured at a first timing by a camera mounted on the moving body from a first point of view. A second point of view is one at a second timing later than the first timing. A homography process converts the first image viewed from the first point of view into a second image viewed from the second point of view based on perspective projection transformation using a projection plane associated with the camera. The remote operator terminal acquires a combination of a plurality of second images by applying the homography process using a common projection plane to a combination of a plurality of first images, and displays the combination of the plurality of second images on a display.

The present invention generally relates to a technology for recognizing objects in a Around View Monitoring (AVM) video for a vehicle. In particular, the present invention relates to a DNN-based object recognition method for multi-channel fisheye images of a vehicle AVM apparatus, by projecting multi-channel unit images of fisheye-lens cameras of the vehicle AVM apparatus onto a cylindrical projection plane so as to obtain multi-channel unit projection images, combining the multi-channel unit projection images on a single image so as to obtain a composite projection image, and inputting the composite projection image to a Deep Neural Network (DNN) model so as to obtain object recognition output. The invention has an advantage that AVM apparatus can effectively assist in safe driving by monitoring objects around the vehicle. Further, the present invention has an advantage that object recognition may be effectively achieved by the insufficient computing resources of vehicles.

The invention relates to the technical field of construction quality detection, in particular to a building construction quality automatic detection method and system.The building construction quality automatic detection method comprises the following steps that vertical projection plane coordinates of multiple components in a building fabricated structure are obtained, a horizontal edge vertex coordinate set is selected, and the geometric center of the components is obtained through calculation and averaging; and generating a component positioning center vector group according to the component number sequence connection points. According to the method, through extraction of vertical projection coordinates of the components, construction of a positioning center vector, establishment of sequence expression of the position relation between the components, judgment of the consistency of the offset difference change rate and the included angle, continuous offset trend extraction, extraction of the gravity center of the components in the section, calculation of the deviation degree of a connecting line to a theoretical axis, and reflection of the overall offset trend of the component section. And identifying the system characteristics of the error according to the offset consistency and the amplitude distribution. According to the process, the component position, direction and aggregation offset characteristics are integrated in a serialization, vectorization and gravity center weighting mode, and the capacity of trend recognition and cluster error judgment is improved.

The invention belongs to the technical field of image processing, and provides an image blurring correction method and device, electronic equipment and a medium, and the method comprises the steps: carrying out the projection of an image and a standard map based on a blurred image, building a Gaussian-Kruger projection model, and obtaining auxiliary parameters, calculating to obtain a horizontal coordinate and a vertical coordinate in a projection plane rectangular coordinate system based on the auxiliary parameters, converting the pixel points into coordinates of the plane rectangular coordinate system, marking the converted coordinates of the pixel points as converted coordinates, generating a sampling signal if the converted coordinates and the projection coordinates are inconsistent in the same plane rectangular coordinate system, and outputting the sampling signal. The method comprises the following steps: sampling a sampling signal, re-sampling an image by adopting a bilinear interpolation method based on the sampling signal, marking a pixel point as a deteriorated pixel point if the pixel value of the pixel point of the sampling image is smaller than the pixel value of the pixel point of an original image, obtaining a deteriorated performance value based on the deteriorated pixel point, obtaining error data based on an adjustment signal, and outputting the error data. And adjusting the deteriorated coordinates according to the error data.

An endoscope includes a distal end member that is connected to a distal end side of an insertion part and that is made of a conductive material, and an insulating ring that is mounted on a base end side of the distal end member and that has an insulating property, in which the distal end member has a first region in which an observation window, an illumination window, and a treatment tool outlet port are disposed, and a second region that is provided on a base end side of the first region and on which the insulating ring is mounted, and in a case in which the first region and the second region are projected onto a projection plane perpendicular to a longitudinal axis of the insertion part, a maximum outer diameter of the second region is smaller than a maximum outer diameter of the first region.

The invention discloses an interactive projection system and method based on structured light perception and image anti-distortion, and relates to the technical field of interactive projection, and the method comprises a structured light perception module which is used for obtaining a projection plane depth image and an object image in a projection area; the projection modeling and object recognition module is used for constructing a change relation from a plane coordinate to a three-dimensional world coordinate according to the projection plane depth image, and recognizing object state data according to the object image; the image control and projection display module is used for determining an original image according to the object state data; the image anti-distortion processing module is used for performing pre-transformation processing on the original image based on the grid model and the projection device parameters to generate an anti-distortion image; and the image control and projection display module is also used for projecting the anti-distortion image to the projection area in real time. The interactive experience and the projection effect can be remarkably improved.

Disclosed is an electronic device including a projection component. The electronic device identifies whether a touch sensing device configured to detachably couple to the electronic device is coupled to the electronic device to sense a touch input of a user on a soft keyboard. Based on identification that the touch sensing device is coupled to the electronic device, the electronic device controls the projection component to project a soft keyboard corresponding to a first keyboard layout on a projection plane.

A large-scale point cloud-oriented two-dimensional regularized planar projection method and an encoding and decoding method are disclosed. The two-dimensional regularized planar projection method includes: obtaining original point cloud data; initializing a two-dimensional projection plane structure of a point cloud; and determining a mapping relationship between the original point cloud data and the two-dimensional projection plane structure to obtain a two-dimensional regularized projection plane structure corresponding to the point cloud. The encoding and decoding method includes: predicting based on the two-dimensional regularized projection plane structure of the point cloud to obtain to-be-encoded data; dividing the to-be-encoded data into a first type of to-be-encoded data and a second type of to-be-encoded data; and encoding different data in the first type of to-be-encoded data separately in a preset encoding manner, and correspondingly encoding the second type of to-be-encoded data, to obtain a geometric information bitstream.

There is provided a system and method for determining a three-dimensional model of an object using a projector and a light sensor arranged in a stereo configuration. The method including: receiving pixel intensity values captured by the light sensor for a plurality of images of a scene containing the object, wherein the images of the scene each capture different projection patterns emitted by the projector onto the scene; determining, using the pixel intensity values from a set of the plurality of images, correspondence between a projector plane and a camera plane to form a three-dimensional model of the object, the correspondence determined using a trained artificial neural network model that uses a combination of volume rendering and geometric representation; and outputting the three-dimensional model of the object.

A system for presenting digital effects in a head-wearable apparatus is provided. The system generates, by a digital effect application, one or more digital effects for presentation on a digital effect display component and receives, by the digital effect display component, the one or more digital effects, the digital effect display component. The system receives, by the digital effect display component from the digital effect application, positioning information for the one or more digital effects in three-dimensional (3D) space. The system configures, by the digital effect display component, a two-dimensional (2D) re-projection plane based on the positioning information received from the digital effect application and displays, by the digital effect display component, the one or more digital effects on the 2D re-projection plane.

The invention provides a landslide volume estimation method and device, and relates to the technical field of surveying and mapping, and the method comprises the steps: carrying out the boundary recognition of a landslide remote sensing image, obtaining a landslide vector boundary, and obtaining a landslide orthographic projection plane; determining a landslide target area, a landslide target length and a landslide target width according to the landslide orthographic projection plane, and determining a target length-width ratio based on the landslide target length and the landslide target width; based on the landslide target area and the target length-width ratio, generating a normalized center distance based on an ellipsoid geometric model; and estimating the landslide volume based on the normalized center distance, the landslide target area and the landslide target width. Based on the technical scheme, the landslide volume can be quickly estimated.

The invention discloses an unmanned aerial vehicle image intelligent perception plotting method and system based on view GIS fusion. The method comprises the steps that a sequence image of a target area is collected through an unmanned aerial vehicle platform; target detection, classification and tracking are carried out based on deep learning, and target pixel coordinates are identified; constructing an intelligent mapping model from a pixel coordinate system to a geographic coordinate system to realize geographic positioning of a target; precise space calibration is carried out on the illegal target; and in combination with space calibration, interactive plotting and visualization of target illegal behaviors are realized at a WebGIS end, and a structured law enforcement evidence packet is formed. According to the method, the POS data and the visual information are deeply fused, the dynamic projection plane estimation technology is adopted, the geographic positioning precision better than that of a traditional method is achieved, the method has obvious advantages especially in complex environments such as urban areas, and high positioning precision can be achieved.

The present invention generally relates to a technology for recognizing objects in a Around View Monitoring (AVM) video for a vehicle. In particular, the present invention relates to a DNN-based object recognition method for multi-channel fisheye images of a vehicle AVM apparatus, by projecting multi-channel unit images of fisheye-lens cameras of the vehicle AVM apparatus onto a cylindrical projection plane so as to obtain multi-channel unit projection images, combining the multi-channel unit projection images on a single image so as to obtain a composite projection image, and inputting the composite projection image to a Deep Neural Network (DNN) model so as to obtain object recognition output. The invention has an advantage that AVM apparatus can effectively assist in safe driving by monitoring objects around the vehicle. Further, the present invention has an advantage that object recognition may be effectively achieved by the insufficient computing resources of vehicles.

The application relates to the whole vehicle arrangement technical field, in particular to a power system and a car. The power system comprises a driving motor, a transmission mechanism, an output mechanism, a generator, an engine and a flywheel. The driving motor has a first output shaft. The transmission mechanism comprises a transmission shaft, the transmission shaft is in transmission connection with the first output shaft and the output mechanism. The engine is in transmission connection with the flywheel. The first output shaft in the orthographic projection on the first projection plane and the transmission shaft in the orthographic projection on the first projection plane are both separated from the orthographic projection of the flywheel on the first projection plane, and the first projection plane is a plane perpendicular to the length direction of the engine. The generator has an input shaft, the input shaft is in transmission connection with the flywheel, and the orthographic projection of the input shaft on the first projection plane is located in the orthographic projection of the flywheel on the first projection plane. In this way, the compactness of the engine can be improved, the width of the power system is shortened, and the volume thereof is reduced.

The invention is applicable to the field of data processing, and provides a hybrid spatial indexing method and system, electronic equipment and a computer program product.The method comprises the steps that a first projection area of a target three-dimensional space range indicated by a retrieval query request on a target projection plane is determined; based on a two-dimensional spatial index, screening out at least one candidate three-dimensional object of which a projection area on the target projection plane intersects with the first projection area from a plurality of three-dimensional objects; and screening out a target three-dimensional object of which the three-dimensional space range is intersected with the target three-dimensional space range from at least one candidate three-dimensional object. According to the scheme, the three-dimensional space retrieval efficiency can be improved.

The invention discloses a line scanning optical acquisition and detection method and a laser scanning acquisition and detection system. The acquisition method comprises the step of acquiring line-by-line image information of a detected object by line scanning in a manner that a scanning line and a scanning direction are inclined on a scanning projection plane. The detection method comprises the step of judging whether the detected object has defects based on the centring line image. The acquisition system comprises a laser projector, an area-array camera and a scanning driving unit, the linear laser projector and the area-array camera are configured to be fixed in relative position and relative angle, and the scanning driving unit is configured to be capable of moving the linear laser projector and / or the measured object so as to enable a centering line of the linear laser projector to scan on the measured object. The detection system further comprises an image processing unit and a defect judgment unit. By arranging the scanning lines inclined to the scanning direction, the detection resolution and the information amount can be ingeniously increased on the premise that the cost of existing equipment is not increased, and detection of a high-speed moving object is particularly facilitated.

The invention discloses an automatic parking measuring device, and relates to the technical field of parking measurement, the automatic parking measuring device comprises a clamping structure, a mounting seat, a grating scale structure, a seat body adjusting structure and a box body adjusting structure, the clamping structure is used for clamping and fixing an automobile fender, the mounting seat is connected to the clamping structure, and the grating scale structure is arranged on the mounting seat. The grating scale structure comprises a shielding box connected to the mounting base, a grating opening is formed in the bottom of the shielding box, light can be guided into the shielding box and can penetrate out of the grating opening so as to form a grating scale on a projection plane, and the base body adjusting structure is used for adjusting the horizontal dip angle and / or height of the mounting base. And the box body adjusting structure is used for at least adjusting the horizontal position of the shielding box on the mounting seat. The position of the wheel is convenient to observe through the scale at the throwing position of the grating scale structure, and the position of the grating scale structure is adjusted through the seat adjusting structure and the box adjusting structure.

Disclosed are a point cloud encoding and decoding method and device based on a two-dimensional regularization plane projection. The encoding method includes: acquiring original point cloud data; performing two-dimensional regularization plane projection on the original point cloud data to obtain a two-dimensional projection plane structure; obtaining a plurality of pieces of two-dimensional image information according to the two-dimensional projection plane structure; and encoding the plurality of pieces of two-dimensional image information to obtain code stream information.

This application discloses a method, apparatus, device, storage medium, and program product for screening face images, belonging to the field of face image screening technology. The method includes: acquiring multiple face images; detecting facial key points and target facial regions from the face images; calculating a first three-dimensional pose angle of the face images based on the facial key points; performing error compensation correction on the first three-dimensional pose angle to obtain a second three-dimensional pose angle; mapping the coordinates of the key points of the target facial region to a virtual projection plane when the face is facing the camera, based on the second three-dimensional pose angle, to obtain corrected coordinates of the key points of the target facial region; calculating state parameters of the target facial region based on the corrected coordinates of the key points of the target facial region; and selecting face images from the multiple face images whose target facial region state parameters satisfy a first preset condition and whose second three-dimensional pose angle satisfies a second preset condition, thereby obtaining a target image. According to the embodiments of this application, the accuracy and efficiency of the screening results can be improved.

Embodiments of the present disclosure relate to the technical field of computers, and provide a cylindrical surface detection method and apparatus. The method comprises: obtaining a plane detection result corresponding to point clouds to be detected; dividing approximately parallel planes in the plane detection result into plane groups; for each plane group, determining, from said point clouds, a point cloud set corresponding to the plane group and a projection plane corresponding to the point cloud set, wherein point cloud points in one point cloud set and an acquisition device configured to obtain said point clouds are located on the same side of the projection plane corresponding to the point cloud set, and the projection plane is a plane in the corresponding plane group; determining a target point cloud set and a target projection plane from the obtained point cloud sets and the corresponding projection planes on the basis of the projection point distribution of the point cloud sets on the corresponding projection planes; and detecting a target cylindrical surface on the basis of the target point cloud set and the target projection plane. In this way, the cylindrical surface can be detected from the point clouds, and high detection accuracy is achieved.

A device for storing and dispensing at least two cosmetic products comprises: a main body defining a first reservoir and a second reservoir; a first pump configured to be triggered along a first triggering axis; a second pump configured to be triggered along a second triggering axis parallel to the first triggering axis; a nozzle movably arranged relative to the main body and; and an applicator operable to move the nozzle relative to the main body parallel to the first triggering axis and the second triggering axis, from a resting position into a discharging position; wherein the applicator comprises: a pressing plate configured to be pressed by a user; a base plate configured for pushing the nozzle; and a stem portion fixed on one end to the pressing plate at a central region of the pressing plate, and fixed on the other end to the base plate, the stem portion extends in parallel to the first triggering axis and the second triggering axis; wherein the projected area of the pressing plate in a projection plane perpendicular to the first triggering axis and the second triggering axis is 20%-50% of the projected area of the base plate in the projection plane.

The utility model discloses a lens vibration eccentricity detection device relates to lens eccentricity detection technical field. The device includes: light source generator, is fixed in the horizontal surface of detection platform, and the object side of measured lens is fixedly connected with light source generator, projection plane is set up in the image side of measured lens, the projection plane is equipped with positioning figure, is used for the optical signal of light source generator and forms the projection on the projection plane through measured lens, camera, with projection plane opposite setting, is used for real -time shooting the image on projection plane, including the optical signal image of measured lens still time and the optical signal image of measured lens when being subjected to the vibration, terminal equipment is connected with camera, obtains the image of camera shooting, through comparing the optical signal image of measured lens still time and the optical signal image of measured lens when being subjected to the vibration, detects the eccentricity when the lens vibration.